/* 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 #include #include #include #include #include #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), status () { } 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); }