/* fhandler_socket.cc. See fhandler.h for a description of the fhandler classes.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <sys/socket.h>
#include <asm/byteorder.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/statvfs.h>
#include <cygwin/acl.h>
#include "cygerrno.h"
#include "path.h"
#include "fhandler.h"
#include "tls_pbuf.h"
extern "C" {
int sscanf (const char *, const char *, ...);
} /* End of "C" section */
/**********************************************************************/
/* fhandler_socket */
fhandler_socket::fhandler_socket () :
fhandler_base (),
uid (myself->uid),
gid (myself->gid),
mode (S_IFSOCK | S_IRWXU | S_IRWXG | S_IRWXO),
_rcvtimeo (INFINITE),
_sndtimeo (INFINITE)
{
}
fhandler_socket::~fhandler_socket ()
{
}
char *
fhandler_socket::get_proc_fd_name (char *buf)
{
__small_sprintf (buf, "socket:[%lu]", get_plain_ino ());
return buf;
}
int
fhandler_socket::getpeereid (pid_t *pid, uid_t *euid, gid_t *egid)
{
set_errno (EINVAL);
return -1;
}
/* Definitions of old ifreq stuff used prior to Cygwin 1.7.0. */
#define OLD_SIOCGIFFLAGS _IOW('s', 101, struct __old_ifreq)
#define OLD_SIOCGIFADDR _IOW('s', 102, struct __old_ifreq)
#define OLD_SIOCGIFBRDADDR _IOW('s', 103, struct __old_ifreq)
#define OLD_SIOCGIFNETMASK _IOW('s', 104, struct __old_ifreq)
#define OLD_SIOCGIFHWADDR _IOW('s', 105, struct __old_ifreq)
#define OLD_SIOCGIFMETRIC _IOW('s', 106, struct __old_ifreq)
#define OLD_SIOCGIFMTU _IOW('s', 107, struct __old_ifreq)
#define OLD_SIOCGIFINDEX _IOW('s', 108, struct __old_ifreq)
#define CONV_OLD_TO_NEW_SIO(old) (((old)&0xff00ffff)|(((long)sizeof(struct ifreq)&IOCPARM_MASK)<<16))
struct __old_ifreq {
#define __OLD_IFNAMSIZ 16
union {
char ifrn_name[__OLD_IFNAMSIZ]; /* if name, e.g. "en0" */
} ifr_ifrn;
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short ifru_flags;
int ifru_metric;
int ifru_mtu;
int ifru_ifindex;
} ifr_ifru;
};
int
fhandler_socket::ioctl (unsigned int cmd, void *p)
{
extern int get_ifconf (struct ifconf *ifc, int what); /* net.cc */
int res;
struct ifconf ifc, *ifcp;
struct ifreq *ifrp;
switch (cmd)
{
case SIOCGIFCONF:
ifcp = (struct ifconf *) p;
if (!ifcp)
{
set_errno (EINVAL);
return -1;
}
if (CYGWIN_VERSION_CHECK_FOR_OLD_IFREQ)
{
ifc.ifc_len = ifcp->ifc_len / sizeof (struct __old_ifreq)
* sizeof (struct ifreq);
ifc.ifc_buf = (caddr_t) alloca (ifc.ifc_len);
}
else
{
ifc.ifc_len = ifcp->ifc_len;
ifc.ifc_buf = ifcp->ifc_buf;
}
res = get_ifconf (&ifc, cmd);
if (res)
debug_printf ("error in get_ifconf");
if (CYGWIN_VERSION_CHECK_FOR_OLD_IFREQ)
{
struct __old_ifreq *ifr = (struct __old_ifreq *) ifcp->ifc_buf;
for (ifrp = ifc.ifc_req;
(caddr_t) ifrp < ifc.ifc_buf + ifc.ifc_len;
++ifrp, ++ifr)
{
memcpy (&ifr->ifr_ifrn, &ifrp->ifr_ifrn, sizeof ifr->ifr_ifrn);
ifr->ifr_name[__OLD_IFNAMSIZ - 1] = '\0';
memcpy (&ifr->ifr_ifru, &ifrp->ifr_ifru, sizeof ifr->ifr_ifru);
}
ifcp->ifc_len = ifc.ifc_len / sizeof (struct ifreq)
* sizeof (struct __old_ifreq);
}
else
ifcp->ifc_len = ifc.ifc_len;
break;
case OLD_SIOCGIFFLAGS:
case OLD_SIOCGIFADDR:
case OLD_SIOCGIFBRDADDR:
case OLD_SIOCGIFNETMASK:
case OLD_SIOCGIFHWADDR:
case OLD_SIOCGIFMETRIC:
case OLD_SIOCGIFMTU:
case OLD_SIOCGIFINDEX:
cmd = CONV_OLD_TO_NEW_SIO (cmd);
/*FALLTHRU*/
case SIOCGIFFLAGS:
case SIOCGIFBRDADDR:
case SIOCGIFNETMASK:
case SIOCGIFADDR:
case SIOCGIFHWADDR:
case SIOCGIFMETRIC:
case SIOCGIFMTU:
case SIOCGIFINDEX:
case SIOCGIFFRNDLYNAM:
case SIOCGIFDSTADDR:
{
if (!p)
{
debug_printf ("ifr == NULL");
set_errno (EINVAL);
return -1;
}
if (cmd > SIOCGIFINDEX && CYGWIN_VERSION_CHECK_FOR_OLD_IFREQ)
{
debug_printf ("cmd not supported on this platform");
set_errno (EINVAL);
return -1;
}
ifc.ifc_len = 64 * sizeof (struct ifreq);
ifc.ifc_buf = (caddr_t) alloca (ifc.ifc_len);
if (cmd == SIOCGIFFRNDLYNAM)
{
struct ifreq_frndlyname *iff = (struct ifreq_frndlyname *)
alloca (64 * sizeof (struct ifreq_frndlyname));
for (int i = 0; i < 64; ++i)
ifc.ifc_req[i].ifr_frndlyname = &iff[i];
}
res = get_ifconf (&ifc, cmd);
if (res)
{
debug_printf ("error in get_ifconf");
break;
}
if (CYGWIN_VERSION_CHECK_FOR_OLD_IFREQ)
{
struct __old_ifreq *ifr = (struct __old_ifreq *) p;
debug_printf (" name: %s", ifr->ifr_name);
for (ifrp = ifc.ifc_req;
(caddr_t) ifrp < ifc.ifc_buf + ifc.ifc_len;
++ifrp)
{
debug_printf ("testname: %s", ifrp->ifr_name);
if (! strcmp (ifrp->ifr_name, ifr->ifr_name))
{
memcpy (&ifr->ifr_ifru, &ifrp->ifr_ifru,
sizeof ifr->ifr_ifru);
break;
}
}
}
else
{
struct ifreq *ifr = (struct ifreq *) p;
debug_printf (" name: %s", ifr->ifr_name);
for (ifrp = ifc.ifc_req;
(caddr_t) ifrp < ifc.ifc_buf + ifc.ifc_len;
++ifrp)
{
debug_printf ("testname: %s", ifrp->ifr_name);
if (! strcmp (ifrp->ifr_name, ifr->ifr_name))
{
if (cmd == SIOCGIFFRNDLYNAM)
/* The application has to care for the space. */
memcpy (ifr->ifr_frndlyname, ifrp->ifr_frndlyname,
sizeof (struct ifreq_frndlyname));
else
memcpy (&ifr->ifr_ifru, &ifrp->ifr_ifru,
sizeof ifr->ifr_ifru);
break;
}
}
}
if ((caddr_t) ifrp >= ifc.ifc_buf + ifc.ifc_len)
{
set_errno (EINVAL);
return -1;
}
break;
}
default:
res = fhandler_base::ioctl (cmd, p);
break;
}
syscall_printf ("%d = ioctl_socket(%x, %p)", res, cmd, p);
return res;
}
int
fhandler_socket::fcntl (int cmd, intptr_t arg)
{
int res = 0;
int request, current;
switch (cmd)
{
case F_SETFL:
{
/* Carefully test for the O_NONBLOCK or deprecated OLD_O_NDELAY flag.
Set only the flag that has been passed in. If both are set, just
record O_NONBLOCK. */
int new_flags = arg & O_NONBLOCK_MASK;
if ((new_flags & OLD_O_NDELAY) && (new_flags & O_NONBLOCK))
new_flags = O_NONBLOCK;
current = get_flags () & O_NONBLOCK_MASK;
request = new_flags ? 1 : 0;
if (!!current != !!new_flags && (res = ioctl (FIONBIO, &request)))
break;
set_flags ((get_flags () & ~O_NONBLOCK_MASK) | new_flags);
break;
}
default:
res = fhandler_base::fcntl (cmd, arg);
break;
}
return res;
}
int
fhandler_socket::open (int flags, mode_t mode)
{
set_errno (ENXIO);
return 0;
}
int __reg2
fhandler_socket::fstat (struct stat *buf)
{
int res;
res = fhandler_base::fstat (buf);
if (!res)
{
buf->st_dev = FHDEV (DEV_SOCK_MAJOR, 0);
if (!(buf->st_ino = get_plain_ino ()))
sscanf (get_name (), "/proc/%*d/fd/socket:[%lld]",
(long long *) &buf->st_ino);
buf->st_uid = uid;
buf->st_gid = gid;
buf->st_mode = mode;
buf->st_size = 0;
}
return res;
}
int __reg2
fhandler_socket::fstatvfs (struct statvfs *sfs)
{
memset (sfs, 0, sizeof (*sfs));
sfs->f_bsize = sfs->f_frsize = 4096;
sfs->f_namemax = NAME_MAX;
return 0;
}
int
fhandler_socket::fchmod (mode_t newmode)
{
mode = (newmode & ~S_IFMT) | S_IFSOCK;
return 0;
}
int
fhandler_socket::fchown (uid_t newuid, gid_t newgid)
{
bool perms = check_token_membership (&well_known_admins_sid);
/* Admin rulez */
if (!perms)
{
/* Otherwise, new uid == old uid or current uid is fine */
if (newuid == ILLEGAL_UID || newuid == uid || newuid == myself->uid)
perms = true;
/* Otherwise, new gid == old gid or current gid is fine */
else if (newgid == ILLEGAL_GID || newgid == gid || newgid == myself->gid)
perms = true;
else
{
/* Last but not least, newgid in supplementary group list is fine */
tmp_pathbuf tp;
gid_t *gids = (gid_t *) tp.w_get ();
int num = getgroups (65536 / sizeof (*gids), gids);
for (int idx = 0; idx < num; ++idx)
if (newgid == gids[idx])
{
perms = true;
break;
}
}
}
if (perms)
{
if (newuid != ILLEGAL_UID)
uid = newuid;
if (newgid != ILLEGAL_GID)
gid = newgid;
return 0;
}
set_errno (EPERM);
return -1;
}
int
fhandler_socket::facl (int cmd, int nentries, aclent_t *aclbufp)
{
set_errno (EOPNOTSUPP);
return -1;
}
int
fhandler_socket::link (const char *newpath)
{
return fhandler_base::link (newpath);
}