2 * daemon-messages.c: Communications to and from the handle daemon
5 * Dick Porter (dick@ximian.com)
7 * (C) 2002 Ximian, Inc.
15 #include <sys/types.h>
16 #include <sys/socket.h>
17 /* Freebsd needs this included explicitly, but it doesn't hurt on Linux */
20 #ifndef HAVE_MSG_NOSIGNAL
24 #include <mono/io-layer/wapi.h>
25 #include <mono/io-layer/daemon-messages.h>
27 /* Solaris doesn't define these */
29 #define CMSG_LEN(size) (sizeof (struct cmsghdr) + (size))
32 #define CMSG_SPACE(size) (sizeof (struct cmsghdr) + (size))
35 static mono_mutex_t req_mutex;
36 static mono_once_t attr_key_once = MONO_ONCE_INIT;
37 static mono_mutexattr_t attr;
39 static void attr_init (void)
43 ret = mono_mutexattr_init (&attr);
46 ret = mono_mutexattr_settype (&attr, MONO_MUTEX_RECURSIVE);
49 ret = mono_mutex_init (&req_mutex, &attr);
53 /* Send request on fd, wait for response (called by applications, not
54 * the daemon, indirectly through _wapi_daemon_request_response and
55 * _wapi_daemon_request_response_with_fds)
57 static void _wapi_daemon_request_response_internal (int fd,
59 WapiHandleResponse *resp)
62 #ifndef HAVE_MSG_NOSIGNAL
63 void (*old_sigpipe)(int);
66 mono_once (&attr_key_once, attr_init);
68 /* Serialise requests to the daemon from the same process. We
69 * rely on request turnaround time being minimal anyway, so
70 * performance shouldnt suffer from the mutex.
72 pthread_cleanup_push ((void(*)(void *))mono_mutex_unlock_in_cleanup,
74 ret = mono_mutex_lock (&req_mutex);
77 #ifdef HAVE_MSG_NOSIGNAL
79 ret=sendmsg (fd, msg, MSG_NOSIGNAL);
81 while (ret==-1 && errno==EINTR);
83 old_sigpipe = signal (SIGPIPE, SIG_IGN);
85 ret=sendmsg (fd, msg, 0);
87 while (ret==-1 && errno==EINTR);
90 if(ret!=sizeof(WapiHandleRequest)) {
92 g_critical (G_GNUC_PRETTY_FUNCTION ": The handle daemon vanished!");
95 g_warning (G_GNUC_PRETTY_FUNCTION ": Send error: %s",
97 g_assert_not_reached ();
101 #ifdef HAVE_MSG_NOSIGNAL
103 ret=recv (fd, resp, sizeof(WapiHandleResponse), MSG_NOSIGNAL);
105 while (ret==-1 && errno==EINTR);
108 ret=recv (fd, resp, sizeof(WapiHandleResponse), 0);
110 while (ret==-1 && errno==EINTR);
111 signal (SIGPIPE, old_sigpipe);
116 g_critical (G_GNUC_PRETTY_FUNCTION ": The handle daemon vanished!");
119 g_warning (G_GNUC_PRETTY_FUNCTION ": Send error: %s",
121 g_assert_not_reached ();
125 ret = mono_mutex_unlock (&req_mutex);
128 pthread_cleanup_pop (0);
131 /* Send request on fd with filedescriptors, wait for response (called
132 * by applications, not the daemon)
134 void _wapi_daemon_request_response_with_fds (int fd, WapiHandleRequest *req,
135 WapiHandleResponse *resp,
136 int in_fd, int out_fd, int err_fd)
138 struct msghdr msg={0};
139 struct cmsghdr *cmsg;
141 char cmsgdata[CMSG_SPACE (sizeof(int)*3)];
148 msg.msg_control=cmsgdata;
149 msg.msg_controllen=sizeof(cmsgdata);
153 iov.iov_len=sizeof(WapiHandleRequest);
155 cmsg=CMSG_FIRSTHDR (&msg);
156 cmsg->cmsg_len=CMSG_LEN (sizeof(int)*3);
157 cmsg->cmsg_level=SOL_SOCKET;
158 cmsg->cmsg_type=SCM_RIGHTS;
159 fdptr=(int *)CMSG_DATA (cmsg);
164 msg.msg_controllen=CMSG_SPACE (sizeof(int)*3);
166 _wapi_daemon_request_response_internal (fd, &msg, resp);
169 /* Send request on fd, wait for response (called by applications, not
172 void _wapi_daemon_request_response (int fd, WapiHandleRequest *req,
173 WapiHandleResponse *resp)
175 struct msghdr msg={0};
182 msg.msg_control=NULL;
183 msg.msg_controllen=0;
187 iov.iov_len=sizeof(WapiHandleRequest);
189 _wapi_daemon_request_response_internal (fd, &msg, resp);
192 /* Read request on fd (called by the daemon) */
193 int _wapi_daemon_request (int fd, WapiHandleRequest *req, int *fds,
199 struct cmsghdr *cmsg;
200 guchar cmsgdata[CMSG_SPACE (sizeof(int)*3)];
206 msg.msg_control=cmsgdata;
207 msg.msg_controllen=sizeof(cmsgdata);
210 iov.iov_len=sizeof(WapiHandleRequest);
213 #ifdef HAVE_MSG_NOSIGNAL
214 ret=recvmsg (fd, &msg, MSG_NOSIGNAL);
216 ret=recvmsg (fd, &msg, 0);
219 while (ret==-1 && errno==EINTR);
221 if(ret==-1 || ret!= sizeof(WapiHandleRequest)) {
222 /* Make sure we dont do anything with this response */
223 req->type=WapiHandleRequestType_Error;
226 g_warning (G_GNUC_PRETTY_FUNCTION ": Recv error: %s",
229 /* The next loop around poll() should tidy up */
233 if(msg.msg_flags & MSG_OOB) {
234 g_message (G_GNUC_PRETTY_FUNCTION ": OOB data received");
236 if(msg.msg_flags & MSG_CTRUNC) {
237 g_message (G_GNUC_PRETTY_FUNCTION ": ancillary data was truncated");
239 g_message (G_GNUC_PRETTY_FUNCTION ": msg.msg_controllen=%d",
243 cmsg=CMSG_FIRSTHDR (&msg);
244 if(cmsg!=NULL && cmsg->cmsg_level==SOL_SOCKET &&
245 cmsg->cmsg_type==SCM_RIGHTS) {
247 g_message (G_GNUC_PRETTY_FUNCTION ": cmsg->cmsg_len=%d",
249 g_message (G_GNUC_PRETTY_FUNCTION
250 ": cmsg->level=%d cmsg->type=%d", cmsg->cmsg_level,
254 memcpy (fds, (int *)CMSG_DATA (cmsg), sizeof(int)*3);
258 g_message (G_GNUC_PRETTY_FUNCTION
259 ": fd[0]=%d, fd[1]=%d, fd[2]=%d", fds[0], fds[1],
264 g_message (G_GNUC_PRETTY_FUNCTION ": no ancillary data");
272 /* Send response on fd (called by the daemon) */
273 int _wapi_daemon_response (int fd, WapiHandleResponse *resp)
278 #ifdef HAVE_MSG_NOSIGNAL
279 ret=send (fd, resp, sizeof(WapiHandleResponse), MSG_NOSIGNAL);
281 ret=send (fd, resp, sizeof(WapiHandleResponse), 0);
284 while (ret==-1 && errno==EINTR);
288 if(ret==-1 || ret != sizeof(WapiHandleResponse)) {
289 g_warning (G_GNUC_PRETTY_FUNCTION ": Send error: %s",
291 /* The next loop around poll() should tidy up */