Borland Programmer's Resource/Borland_Programmers_Resource_CD_1995.iso/winsock/wsftp32/ws_ip.c

C/C++ Source or Header | 1995-05-19 | 5.6 KB | 164 lines

/***************************************************************************
  Windows Sockets Client Application Support Module

  Written by:
      John A. Junod             Internet: <[e-mail]>
      267 Hillwood Street                 <[e-mail]>
      Martinez, GA 30907      Compuserve: 72321,366

  This program executable and all source code is released into the public
  domain.  It would be nice (but is not required) to give me a little
  credit for any use of this code.

  THE INFORMATION AND CODE PROVIDED IS PROVIDED AS IS WITHOUT WARRANTY
  OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  PURPOSE. IN NO EVENT SHALL JOHN A. JUNOD BE LIABLE FOR ANY DAMAGES
  WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS
  OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF JOHN A. JUNOD HAS BEEN
  ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

*****************************************************************************/
/*
  MODULE: WS_IP.C

  Based on code published in UNIX Network Programming by W. Richard Stevens

  These are common routines that will be needed by many different programs
  and should not be modified for a specific instance.
*/
#include "ws_glob.h"
#include "ws_ftp.h"
#include <stdlib.h>

volatile SOCKET connectTCP(char *host,char *service)
{
  return connectsock(host,service,"tcp");
}

volatile SOCKET connectUDP(char *host,char *service)
{
  return connectsock(host,service,"udp");
}

volatile SOCKET connectsock(char *host,char *service,char *protocol)
{
  struct hostent *pHostEntry;      // pointer to host entry
  struct servent FAR *pServiceEntry;   // pointer to service entry
  struct protoent FAR *pProtoEntry;    // pointer to protocol entry
  volatile SOCKET sSocket;                  // socket
  int nSocketType;                 // socket type
  short pproto;
  int iFlag=1;

  DoPrintf("  ");
  // initialize socket address structure
  memset((char *)&saSockAddr,0,sizeof(saSockAddr));
  saSockAddr.sin_family=AF_INET;
  // get service port number from name
  if(pServiceEntry=getservbyname(service,protocol))
    {
    if (uiFtpPort != 21)
      {
       DoPrintf("Overridding Ftp port number with %u",uiFtpPort);
       saSockAddr.sin_port=htons((u_short)uiFtpPort);
      }
    else saSockAddr.sin_port=pServiceEntry->s_port;
    }
 else if((saSockAddr.sin_port=htons((u_short)atoi(service)))==0)
    {
//  lgk new code first try user interface setting if different than 21
    if (uiFtpPort != 21)
      {
       DoPrintf("Overridding Ftp port number with %u",uiFtpPort);
       saSockAddr.sin_port=htons((u_short)uiFtpPort);
      }
    else
     {

       if(strcmpi(service,"FTP")==0)
          saSockAddr.sin_port=htons(21);
       else {
          DoPrintf("can't get \"%s\" service entry",service);
         return INVALID_SOCKET;
       }
     }
  }
  // map host to ip, allow ip
  if(pHostEntry=gethostbyname(host))
    memcpy((char *)&saSockAddr.sin_addr,pHostEntry->h_addr,
             pHostEntry->h_length);
//  memcpy(pHostEntry->h_addr,(char *)&saSockAddr.sin_addr,pHostEntry->h_length);
  else if((saSockAddr.sin_addr.s_addr=inet_addr(host))==INADDR_NONE) {
    DoPrintf("can't get \"%s\" host entry",host);
    return INVALID_SOCKET;
  }
  // map protocol name to protocol number
  if((pProtoEntry=getprotobyname(protocol))==0) {
    if(strcmpi(protocol,"TCP")==0)
      pproto=6;
    else {
      DoPrintf("can't get \"%s\" protocol entry",protocol);
      return INVALID_SOCKET;
    }
  } else pproto=pProtoEntry->p_proto;
  // use protocol to choose socket type
  if(strcmp(protocol,"udp")==0)
    nSocketType=SOCK_DGRAM;
  else
    nSocketType=SOCK_STREAM;
  // allocate a socket
  sSocket=socket(AF_INET,nSocketType,pproto);
  if(sSocket==INVALID_SOCKET)
  {
    ReportWSError("create socket",WSAGetLastError());
    return INVALID_SOCKET;
  }
      // lgk set for reuse
      if(setsockopt(sSocket,SOL_SOCKET,SO_REUSEADDR,
         (char *)&iFlag,sizeof(iFlag))==SOCKET_ERROR)
      {
        ReportWSError("setsockopt",WSAGetLastError());
        closesocket(data_socket);
        return INVALID_SOCKET;
      }

  memcpy((LPSTR)&saSockAddr1,(LPSTR)&saSockAddr,sizeof(saSockAddr));
  saSockAddr1.sin_port=htons(20);

  DoPrintf("connecting to %s ...",inet_ntoa(saSockAddr.sin_addr));
  // connect the socket
  if(connect(sSocket,(struct sockaddr *)&saSockAddr,sizeof(saSockAddr))
      ==SOCKET_ERROR) {
    DoPrintf("Can't connect to %s %s service port %u.",host,service,ntohs(saSockAddr.sin_port));
    ReportWSError("Connect failed -",WSAGetLastError());
    return INVALID_SOCKET;
  }

  DoPrintf("Connected to %s port %u",
    inet_ntoa(saSockAddr.sin_addr),ntohs(saSockAddr.sin_port));

  return sSocket;
}

int sendstr(SOCKET sSocket,LPSTR pBuf,int nBytesToWrite)
{
  int nBytesLeft,nWritten;

  nBytesLeft=nBytesToWrite;
  while(nBytesLeft > 0) {                   // while we haven't written enough
    nWritten=send(sSocket,pBuf,((nBytesLeft>1024)?1024:nBytesLeft),0); // write what we can
    // DoPrintf("[%u] %u send %u",sSocket,nBytesLeft,nWritten);
  if(nWritten <= 0)
    {
      DoPrintf("[%u] %u send %u",sSocket,nBytesLeft,nWritten);
      ReportWSError("send",WSAGetLastError());
      return(nWritten);  // error occured
    }
    nBytesLeft -= nWritten;                 // count what we wrote
    pBuf   += nWritten;                     // adjust buffer pointer
  }
  return(nBytesToWrite - nBytesLeft);       // return count of bytes written
}