ECode CSerialPort::Open(
/* [in] */ IParcelFileDescriptor* pfd,
/* [in] */ Int32 speed)
{
AutoPtr<IFileDescriptor> fd;
pfd->GetFileDescriptor((IFileDescriptor**)&fd);
native_open(fd, speed);
mFileDescriptor = pfd;
return NOERROR;
}
int open(const char *path, int flags, ...)
{
va_list ap;
int data;
va_start(ap, flags);
data = va_arg(ap, int);
va_end(ap);
if (strcmp(path,TUNTAPPATH)==0 && tapfd[0] == -1) {
if (socketpair(PF_UNIX, SOCK_DGRAM, 0,tapfd) == 0)
return tapfd[0];
else
return -1;
} else
return native_open(path, flags, data);
}
int ioctl(int fd, unsigned long int command, ...)
#endif
{
va_list ap;
char *data;
char *vdesock;
int pid;
int callerpid=getpid();
va_start(ap, command);
data = va_arg(ap, char *);
va_end(ap);
if (fd == tapfd[0]) {
if (command == TUNSETIFF) {
struct ifreq *ifr = (struct ifreq *) data;
char num[5];
char name[10];
char scallerpid[6];
ifr->ifr_name[IFNAMSIZ-1] = '\0';
if (ifr->ifr_name[0] == 0) {
if (ifr->ifr_flags & IFF_TAP)
sprintf(name,"tap%d",tapcount++);
else
sprintf(name,"tun%d",tuncount++);
strncpy(ifr->ifr_name,name,IFNAMSIZ);
}
else if (strchr(ifr->ifr_name, '%') != NULL) {
sprintf(name,ifr->ifr_name,tapcount++);
strncpy(ifr->ifr_name,name,IFNAMSIZ);
}
if ((ifr->ifr_flags & IFF_TAP) && (
/* from env: single interface or VDEALLTAP */
((vdesock=getenv(ifr->ifr_name)) != NULL) ||
(vdesock=getenv(VDEALLTAP)) != NULL)
){
if ((pid=fork()) < 0) {
close(tapfd[1]);
errno=EINVAL;
return -1;
} else if (pid > 0) { /*father*/
if((pid=addpid(pid)) < 0) {
close(tapfd[0]);
close(tapfd[1]);
return -1;
} else {
close(tapfd[1]);
return 0;
}
} else { /*son*/
plh=NULL;
close(tapfd[0]);
sprintf(num,"%d",tapfd[1]);
sprintf(scallerpid,"%d",callerpid);
return execlp(VDETAPEXEC,"-",num,vdesock,ifr->ifr_name,
scallerpid,
getvdeopt(ifr,"port"),
getvdeopt(ifr,"group"),
getvdeopt(ifr,"mode"),
(char *) 0);
}
}
else /*roll back to the native tuntap*/
{
int newfd;
int saverrno;
int resultioctl;
close(tapfd[1]);
if ((newfd=native_open(TUNTAPPATH, O_RDWR, 0)) < 0) {
saverrno=errno;
close(tapfd[0]);
errno=saverrno;
return -1;
} else
{
resultioctl=native_ioctl(fd, command, data);
if (resultioctl < 0) {
saverrno=errno;
close(tapfd[0]);
errno=saverrno;
return -1;
} else {
dup2(newfd,tapfd[0]);
return resultioctl;
}
}
}
} else
return 0;
} else
return (native_ioctl(fd, command, data));
}
