HPAVC/HPAVC CD-ROM.iso/pc/ABUSESRC.ZIP/AbuseSrc/macabuse/src/net/mac/mactcp.c

C/C++ Source or Header | 1997-05-20 | 4.7 KB | 196 lines

#include "tcpip.hpp"
#include <ctype.h>

tcpip_protocol tcpip;

/*
FILE *log_file=NULL;
extern int net_start();
void net_log(char *st, void *buf, long size)
{

  if (!log_file)
  {
    if (net_start())
      log_file=fopen("client.log","wb");
    else
      log_file=fopen("server.log","wb");
  }


    fprintf(log_file,"%s%d - ",st,size);
    int i;
    for (i=0;i<size;i++)
      if (isprint(*((unsigned char *)buf+i)))
        fprintf(log_file,"%c",*((unsigned char *)buf+i));
      else fprintf(log_file,"~");

    fprintf(log_file," : ");

    for (i=0;i<size;i++)
    fprintf(log_file,"%02x, ",*((unsigned char *)buf+i),*((unsigned char *)buf+i));
    fprintf(log_file,"\n");
    fflush(log_file);

} */


int unix_fd::read(void *buf, int size, net_address **addr)
{
  int tr=::read(fd,buf,size);
  if (addr) *addr=NULL;
  return tr;
}

int unix_fd::write(void *buf, int size, net_address *addr)
{
  if (addr) fprintf(stderr,"Cannot change address for this socket type\n");
  return ::write(fd,buf,size);
}


net_address *tcpip_protocol::get_local_address()
{
  char my_name[100];                              // now check to see if this address is 'hostname'
  gethostname(my_name,100);
  struct hostent *l_hn=gethostbyname(my_name);
  ip_address *a=new ip_address();
  memset(&a->addr,0,sizeof(a->addr));
  memcpy(&a->addr.sin_addr,*l_hn->h_addr_list,4);
}

net_address *tcpip_protocol::get_node_address(char *&server_name, int def_port, int force_port)
{
  char name[256],*np;
  np=name;
  while (*server_name && *server_name!=':' && *server_name!='/')
    *(np++)=*(server_name)++;
  *np=0;
  if (*server_name==':')
  {
    server_name++;
    char port[256],*p;
    p=port;
    while (*server_name && *server_name!='/')
      *(p++)=*(server_name++);
    *p=0;
    int x;
    if (!force_port)
    {
      if (sscanf(port,"%d",&x)==1) def_port=x;
      else return 0;
    }
  }

  if (*server_name=='/') server_name++;

  hostent *hp=gethostbyname(name);
  if (!hp)
  {
    fprintf(stderr,"unable to locate server named '%s'\n",name);
    return 0;
  }


  sockaddr_in host;
  memset( (char*) &host,0, sizeof(host));
  host.sin_family = AF_INET;
  host.sin_port = htons(def_port);
  host.sin_addr.s_addr = htonl(INADDR_ANY);
  memcpy(&host.sin_addr,hp->h_addr,hp->h_length);
  return new ip_address(&host);
}

net_socket *tcpip_protocol::connect_to_server(net_address *addr, net_socket::socket_type sock_type)
{
  if (addr->protocol_type()!=net_address::IP)
  {
    fprintf(stderr,"Procotol type not supported in the executable\n");
    return NULL;
  }

  int socket_fd=socket(AF_INET,sock_type==net_socket::SOCKET_SECURE ? SOCK_STREAM : SOCK_DGRAM,0);
  if (socket_fd<0)
  {
    fprintf(stderr,"unable to create socket (too many open files?)\n");
    return 0;
  }

  int zz;
  if (setsockopt(socket_fd,SOL_SOCKET,SO_REUSEADDR,(char *)&zz,sizeof(zz))<0)
  {
    fprintf(stderr,"could not set socket option reuseaddr");
    return 0;
  }


  if (connect(socket_fd, (struct sockaddr *) &((ip_address *)addr)->addr, sizeof( ((ip_address *)addr)->addr ))==-1)
  {
    fprintf(stderr,"unable to connect\n");
    close(socket_fd);
    return 0;
  }

  if (sock_type==net_socket::SOCKET_SECURE)
    return new tcp_socket(socket_fd);
  else
    return new udp_socket(socket_fd);
}


net_socket *tcpip_protocol::create_listen_socket(int port, net_socket::socket_type sock_type, char *name)
{
  int socket_fd=socket(AF_INET,sock_type==net_socket::SOCKET_SECURE ? SOCK_STREAM : SOCK_DGRAM,0);
  if (socket_fd<0)
  {
    fprintf(stderr,"unable to create socket (too many open files?)\n");
    return 0;
  }
/*  int zz;
  if (setsockopt(socket_fd,SOL_SOCKET,SO_REUSEADDR,(char *)&zz,sizeof(zz))<0)
  {
    fprintf(stderr,"could not set socket option reuseaddr");
    return 0;
  } */


  net_socket *s;
  if (sock_type==net_socket::SOCKET_SECURE)
    s=new tcp_socket(socket_fd);
  else s=new udp_socket(socket_fd);
  if (s->listen(port)==0)
  {
    delete s;
    return 0;
  }

  return s;
}


tcpip_protocol::tcpip_protocol()
{
  FD_ZERO(&master_set);
  FD_ZERO(&master_write_set);
  FD_ZERO(&read_set);
  FD_ZERO(&exception_set);
  FD_ZERO(&write_set);
}


int tcpip_protocol::select(int block)
{
  memcpy(&read_set,&master_set,sizeof(master_set));
  memcpy(&exception_set,&master_set,sizeof(master_set));
  memcpy(&write_set,&master_write_set,sizeof(master_set));
  if (block)
    return ::select(FD_SETSIZE,&read_set,&write_set,&exception_set,NULL);
  else
  {
    timeval tv={0,0};
    return ::select(FD_SETSIZE,&read_set,&write_set,&exception_set,&tv);
  }
}