1 |
#ifdef __sun |
2 |
#define _XOPEN_SOURCE 1 |
3 |
#define _XOPEN_SOURCE_EXTENDED 1 |
4 |
#define __EXTENSIONS__ 1 |
5 |
#endif |
6 |
|
7 |
#include "EXTERN.h" |
8 |
#include "perl.h" |
9 |
#include "XSUB.h" |
10 |
|
11 |
#if WIN32 |
12 |
|
13 |
/* perl probably did this already */ |
14 |
#include <windows.h> |
15 |
|
16 |
#elif __CYGWIN__ |
17 |
|
18 |
#include <windows.h> |
19 |
#include <io.h> |
20 |
#include <sys/cygwin.h> |
21 |
|
22 |
#define _open_osfhandle(h,m) cygwin_attach_handle_to_fd ("/dev/tcp", -1, (HANDLE)h, 1, GENERIC_READ | GENERIC_WRITE) |
23 |
typedef int SOCKET; |
24 |
|
25 |
#else |
26 |
|
27 |
#include <stddef.h> // needed by broken bsds for NULL used in sys/uio.h |
28 |
#include <stdlib.h> |
29 |
#include <errno.h> |
30 |
|
31 |
/* send_fd/recv_fd taken from libptytty */ |
32 |
#include <sys/types.h> |
33 |
#include <sys/uio.h> |
34 |
#include <sys/socket.h> |
35 |
|
36 |
#ifndef CMSG_SPACE |
37 |
# define CMSG_SPACE(len) (sizeof (struct cmsghdr) + len) |
38 |
#endif |
39 |
|
40 |
#ifndef CMSG_LEN |
41 |
# define CMSG_LEN(len) (sizeof (struct cmsghdr) + len) |
42 |
#endif |
43 |
|
44 |
#endif |
45 |
|
46 |
#if defined(WIN32) |
47 |
/* the rub is this: win32 doesn't seem to have a way to query whether a socket */ |
48 |
/* is non-blocking or not. so we assume it is blocking, make it so if it isn't */ |
49 |
/* and reset it afterwards */ |
50 |
static int |
51 |
rw (int wr, int fd, char *buf, int len) |
52 |
{ |
53 |
u_long nbio = 0; |
54 |
int got = 0; |
55 |
|
56 |
while (got != len) |
57 |
{ |
58 |
int sze = wr |
59 |
? send ((SOCKET)fd, buf, len - got, 0) /* we assume send and recv are macros with arguments */ |
60 |
: recv ((SOCKET)fd, buf, len - got, 0); /* to be on the safe side */ |
61 |
|
62 |
if (sze < 0) |
63 |
{ |
64 |
if (errno == EAGAIN || errno == WSAEWOULDBLOCK) |
65 |
{ |
66 |
ioctl (fd, FIONBIO, (void *)&nbio); |
67 |
nbio = 1; |
68 |
} |
69 |
else |
70 |
break; |
71 |
} |
72 |
else if (sze == 0) |
73 |
break; |
74 |
else |
75 |
got += sze; |
76 |
} |
77 |
|
78 |
if (nbio) |
79 |
ioctl (fd, FIONBIO, (void *)&nbio); |
80 |
|
81 |
return got == len; |
82 |
} |
83 |
#endif |
84 |
|
85 |
static int |
86 |
fd_send (int socket, int fd) |
87 |
{ |
88 |
#if defined(WIN32) |
89 |
DWORD pid; |
90 |
HANDLE hdl; |
91 |
|
92 |
pid = GetCurrentProcessId (); |
93 |
|
94 |
if (!rw (1, socket, (char *)&pid, sizeof (pid))) |
95 |
return 0; |
96 |
|
97 |
errno = EBADF; |
98 |
if (!DuplicateHandle ((HANDLE)-1, (HANDLE)_get_osfhandle (fd), (HANDLE)-1, &hdl, 0, FALSE, DUPLICATE_SAME_ACCESS)) |
99 |
return 0; |
100 |
|
101 |
if (!rw (1, socket, (char *)&hdl, sizeof (hdl))) |
102 |
{ |
103 |
CloseHandle (hdl); |
104 |
return 0; |
105 |
} |
106 |
|
107 |
return 1; |
108 |
|
109 |
#else |
110 |
void *buf = malloc (CMSG_SPACE (sizeof (int))); |
111 |
|
112 |
if (!buf) |
113 |
return 0; |
114 |
|
115 |
struct msghdr msg; |
116 |
struct iovec iov; |
117 |
struct cmsghdr *cmsg; |
118 |
char data = 0; |
119 |
|
120 |
iov.iov_base = &data; |
121 |
iov.iov_len = 1; |
122 |
|
123 |
msg.msg_name = 0; |
124 |
msg.msg_namelen = 0; |
125 |
msg.msg_iov = &iov; |
126 |
msg.msg_iovlen = 1; |
127 |
msg.msg_control = buf; |
128 |
msg.msg_controllen = CMSG_SPACE (sizeof (int)); |
129 |
|
130 |
cmsg = CMSG_FIRSTHDR (&msg); |
131 |
cmsg->cmsg_level = SOL_SOCKET; |
132 |
cmsg->cmsg_type = SCM_RIGHTS; |
133 |
cmsg->cmsg_len = CMSG_LEN (sizeof (int)); |
134 |
|
135 |
*(int *)CMSG_DATA (cmsg) = fd; |
136 |
|
137 |
ssize_t result = sendmsg (socket, &msg, 0); |
138 |
|
139 |
free (buf); |
140 |
|
141 |
return result >= 0; |
142 |
#endif |
143 |
} |
144 |
|
145 |
static int |
146 |
fd_recv (int socket) |
147 |
{ |
148 |
#if defined(WIN32) |
149 |
DWORD pid; |
150 |
HANDLE source, rhd, lhd; |
151 |
|
152 |
if (!rw (0, socket, (char *)&pid, sizeof (pid))) |
153 |
return -1; |
154 |
|
155 |
if (!rw (0, socket, (char *)&rhd, sizeof (rhd))) |
156 |
return -1; |
157 |
|
158 |
source = OpenProcess (PROCESS_DUP_HANDLE, FALSE, pid); |
159 |
errno = EACCES; |
160 |
if (!source) |
161 |
return -1; |
162 |
|
163 |
pid = DuplicateHandle (source, rhd, (HANDLE)-1, &lhd, |
164 |
0, FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE); |
165 |
|
166 |
CloseHandle (source); |
167 |
|
168 |
errno = EBADF; |
169 |
if (!pid) |
170 |
return -1; |
171 |
|
172 |
return _open_osfhandle ((intptr_t)lhd, 0); |
173 |
#else |
174 |
void *buf = malloc (CMSG_SPACE (sizeof (int))); |
175 |
|
176 |
if (!buf) |
177 |
return -1; |
178 |
|
179 |
struct msghdr msg; |
180 |
struct iovec iov; |
181 |
char data = 1; |
182 |
|
183 |
iov.iov_base = &data; |
184 |
iov.iov_len = 1; |
185 |
|
186 |
msg.msg_name = 0; |
187 |
msg.msg_namelen = 0; |
188 |
msg.msg_iov = &iov; |
189 |
msg.msg_iovlen = 1; |
190 |
msg.msg_control = buf; |
191 |
msg.msg_controllen = CMSG_SPACE (sizeof (int)); |
192 |
|
193 |
if (recvmsg (socket, &msg, 0) <= 0) |
194 |
return -1; |
195 |
|
196 |
int fd = -1; |
197 |
errno = EDOM; |
198 |
|
199 |
struct cmsghdr *cmsg = CMSG_FIRSTHDR (&msg); |
200 |
|
201 |
if (data == 0 |
202 |
&& cmsg |
203 |
&& cmsg->cmsg_level == SOL_SOCKET |
204 |
&& cmsg->cmsg_type == SCM_RIGHTS |
205 |
&& cmsg->cmsg_len >= CMSG_LEN (sizeof (int))) |
206 |
fd = *(int *)CMSG_DATA (cmsg); |
207 |
|
208 |
free (buf); |
209 |
|
210 |
return fd; |
211 |
#endif |
212 |
} |
213 |
|
214 |
MODULE = IO::FDPass PACKAGE = IO::FDPass PREFIX = fd_ |
215 |
|
216 |
PROTOTYPES: DISABLE |
217 |
|
218 |
int |
219 |
fd_send (int socket, int fd) |
220 |
|
221 |
int |
222 |
fd_recv (int socket) |
223 |
|