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/* GetCurrentProcessId is XP and up, which means in all supported versions */ |
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/* but older SDK's might need this */ |
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#define _WIN32_WINNT NTDDI_WINXP |
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|
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#ifdef __sun |
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#define _XOPEN_SOURCE 1 |
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#define _XOPEN_SOURCE_EXTENDED 1 |
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#define __EXTENSIONS__ 1 |
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#endif |
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|
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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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#if WIN32 |
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|
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/* perl probably did this already */ |
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#include <windows.h> |
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|
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#elif __CYGWIN__ |
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|
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#include <windows.h> |
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#include <io.h> |
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#include <sys/cygwin.h> |
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|
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#define ioctlsocket(a,b,c) ioctl (a, b, c) |
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#define _open_osfhandle(h,m) cygwin_attach_handle_to_fd ("/dev/pipe", -1, (HANDLE)h, 1, GENERIC_READ | GENERIC_WRITE) |
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typedef int SOCKET; |
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|
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#else |
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|
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#include <stddef.h> // needed by broken bsds for NULL used in sys/uio.h |
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#include <stdlib.h> |
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#include <errno.h> |
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|
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/* send_fd/recv_fd taken from libptytty */ |
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#include <sys/types.h> |
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#include <sys/uio.h> |
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#include <sys/socket.h> |
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|
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#ifndef CMSG_SPACE |
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# define CMSG_SPACE(len) (sizeof (cmsghdr) + len) |
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#endif |
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|
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#ifndef CMSG_LEN |
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# define CMSG_LEN(len) (sizeof (cmsghdr) + len) |
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#endif |
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|
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#endif |
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|
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#if defined(WIN32) |
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/* the rub is this: win32 doesn't seem to have a way to query whether a socket */ |
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/* is non-blocking or not. so we assume it is blocking, make it so if it isn't */ |
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/* and reset it afterwards */ |
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static int |
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rw (int wr, int fd, char *buf, int len) |
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{ |
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u_long nbio = 0; |
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int got = 0; |
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|
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while (got != len) |
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{ |
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int sze = wr |
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? send ((SOCKET)fd, buf, len) /* we assume send and recv are macros with arguments */ |
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: recv ((SOCKET)fd, buf, len); /* to be on the safe side */ |
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|
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if (sze <= 0) |
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{ |
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if (errno == EAGAIN || errno == EWOULDBLOCK || errno == WSAWOULDBLOCK) |
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{ |
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ioctlsocket (s, FIONBIO, &nbio); |
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nbio = 1; |
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} |
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else |
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break; |
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} |
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else |
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got += sze; |
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} |
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|
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if (nbio) |
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ioctlsocket (s, FIONBIO, &nbio); |
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|
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return got == len; |
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} |
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#endif |
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|
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static int |
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fd_send (int socket, int fd) |
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{ |
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#if defined(WIN32) |
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DWORD pid; |
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HANDLE target, h; |
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|
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/* seriously, there is no way to query whether a socket is non-blocking?? */ |
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if (rw (0, socket, (char *)&pid, sizeof (pid), 0) != sizeof (pid)) |
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return 0; |
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|
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target = OpenProcess (PROCESS_DUP_HANDLE, FALSE, pid); |
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if (!target) |
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croak ("AnyEvent::ProcessPool::fd_recv: OpenProcess failed"); |
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|
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if (!DuplicateHandle ((HANDLE)-1, (HANDLE)_get_osfhandle (fd), target, &h, 0, FALSE, DUPLICATE_SAME_ACCESS)) |
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croak ("AnyEvent::ProcessPool::fd_recv: DuplicateHandle failed"); |
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|
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CloseHandle (target); |
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|
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if (rw (1, socket, (char *)&h, sizeof (h), 0) != sizeof (h)) |
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return 0; |
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|
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return 1; |
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|
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#else |
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void *buf = malloc (CMSG_SPACE (sizeof (int))); |
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|
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if (!buf) |
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return 0; |
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|
| 119 |
struct msghdr msg; |
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struct iovec iov; |
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struct cmsghdr *cmsg; |
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char data = 0; |
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|
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iov.iov_base = &data; |
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iov.iov_len = 1; |
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|
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msg.msg_name = 0; |
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msg.msg_namelen = 0; |
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msg.msg_iov = &iov; |
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msg.msg_iovlen = 1; |
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msg.msg_control = buf; |
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msg.msg_controllen = CMSG_SPACE (sizeof (int)); |
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|
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cmsg = CMSG_FIRSTHDR (&msg); |
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cmsg->cmsg_level = SOL_SOCKET; |
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cmsg->cmsg_type = SCM_RIGHTS; |
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cmsg->cmsg_len = CMSG_LEN (sizeof (int)); |
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|
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*(int *)CMSG_DATA (cmsg) = fd; |
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|
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ssize_t result = sendmsg (socket, &msg, 0); |
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|
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free (buf); |
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|
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return result >= 0; |
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#endif |
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} |
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|
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static int |
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fd_recv (int socket) |
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{ |
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#if defined(WIN32) |
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DWORD pid = GetCurrentProcessId (); |
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HANDLE h; |
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|
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if (rw (1, socket, (char *)&pid, sizeof (pid), 0) != sizeof (pid)) |
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return -1; |
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|
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if (rw (0, socket, (char *)&h, sizeof (h), 0) != sizeof (h)) |
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return -1; |
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|
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return _open_osfhandle ((intptr_t)h, 0); |
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#else |
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void *buf = malloc (CMSG_SPACE (sizeof (int))); |
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|
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if (!buf) |
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return -1; |
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|
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struct msghdr msg; |
| 170 |
struct iovec iov; |
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char data = 1; |
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|
| 173 |
iov.iov_base = &data; |
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iov.iov_len = 1; |
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|
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msg.msg_name = 0; |
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msg.msg_namelen = 0; |
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msg.msg_iov = &iov; |
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msg.msg_iovlen = 1; |
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msg.msg_control = buf; |
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msg.msg_controllen = CMSG_SPACE (sizeof (int)); |
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|
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if (recvmsg (socket, &msg, 0) <= 0) |
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return -1; |
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|
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int fd = -1; |
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|
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errno = EDOM; |
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|
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if ( |
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data == 0 |
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#if __OpenBSD__ |
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&& msg.msg_controllen >= CMSG_LEN (sizeof (int)) /* work around a bug in at least openbsd 4.5 and 4.8 */ |
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#else |
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&& msg.msg_controllen >= CMSG_SPACE (sizeof (int)) |
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#endif |
| 197 |
) { |
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struct cmsghdr *cmsg = CMSG_FIRSTHDR (&msg); |
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|
| 200 |
if (cmsg->cmsg_level == SOL_SOCKET |
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&& cmsg->cmsg_type == SCM_RIGHTS |
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&& cmsg->cmsg_len >= CMSG_LEN (sizeof (int))) |
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fd = *(int *)CMSG_DATA (cmsg); |
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} |
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|
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free (buf); |
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|
| 208 |
return fd; |
| 209 |
#endif |
| 210 |
} |
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|
| 212 |
MODULE = IO::FDPass PACKAGE = IO::FDPass PREFIX = fd_ |
| 213 |
|
| 214 |
PROTOTYPES: DISABLE |
| 215 |
|
| 216 |
int |
| 217 |
fd_send (int socket, int fd) |
| 218 |
|
| 219 |
int |
| 220 |
fd_recv (int socket) |
| 221 |
|
