/*
- * daemon-messages.h: Communications to and from the handle daemon
+ * daemon-messages.c: Communications to and from the handle daemon
*
* Author:
* Dick Porter (dick@ximian.com)
#include <pthread.h>
#include <errno.h>
#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+/* Freebsd needs this included explicitly, but it doesn't hurt on Linux */
+#include <sys/uio.h>
#ifndef HAVE_MSG_NOSIGNAL
#include <signal.h>
#include <mono/io-layer/wapi.h>
#include <mono/io-layer/daemon-messages.h>
+/* Solaris doesn't define these */
+#ifndef CMSG_LEN
+#define CMSG_LEN(size) (sizeof (struct cmsghdr) + (size))
+#endif
+#ifndef CMSG_SPACE
+#define CMSG_SPACE(size) (sizeof (struct cmsghdr) + (size))
+#endif
+
+static mono_mutex_t req_mutex;
+static mono_once_t attr_key_once = MONO_ONCE_INIT;
+static mono_mutexattr_t attr;
+
+static void attr_init (void)
+{
+ int ret;
+
+ ret = mono_mutexattr_init (&attr);
+ g_assert (ret == 0);
+
+ ret = mono_mutexattr_settype (&attr, MONO_MUTEX_RECURSIVE);
+ g_assert (ret == 0);
+
+ ret = mono_mutex_init (&req_mutex, &attr);
+ g_assert (ret == 0);
+}
+
/* Send request on fd, wait for response (called by applications, not
- * the daemon)
+ * the daemon, indirectly through _wapi_daemon_request_response and
+ * _wapi_daemon_request_response_with_fds)
*/
-void _wapi_daemon_request_response (int fd, WapiHandleRequest *req,
- WapiHandleResponse *resp)
+static void _wapi_daemon_request_response_internal (int fd,
+ struct msghdr *msg,
+ WapiHandleResponse *resp)
{
- static pthread_mutex_t req_mutex=PTHREAD_MUTEX_INITIALIZER;
int ret;
#ifndef HAVE_MSG_NOSIGNAL
void (*old_sigpipe)(int);
#endif
+ mono_once (&attr_key_once, attr_init);
+
/* Serialise requests to the daemon from the same process. We
* rely on request turnaround time being minimal anyway, so
* performance shouldnt suffer from the mutex.
*/
- pthread_mutex_lock (&req_mutex);
+ pthread_cleanup_push ((void(*)(void *))mono_mutex_unlock_in_cleanup,
+ (void *)&req_mutex);
+ ret = mono_mutex_lock (&req_mutex);
+ g_assert (ret == 0);
#ifdef HAVE_MSG_NOSIGNAL
- ret=send (fd, req, sizeof(WapiHandleRequest), MSG_NOSIGNAL);
+ do {
+ ret=sendmsg (fd, msg, MSG_NOSIGNAL);
+ }
+ while (ret==-1 && errno==EINTR);
#else
old_sigpipe = signal (SIGPIPE, SIG_IGN);
- ret=send (fd, req, sizeof(WapiHandleRequest), 0);
+ do {
+ ret=sendmsg (fd, msg, 0);
+ }
+ while (ret==-1 && errno==EINTR);
#endif
+
if(ret!=sizeof(WapiHandleRequest)) {
if(errno==EPIPE) {
g_critical (G_GNUC_PRETTY_FUNCTION ": The handle daemon vanished!");
}
#ifdef HAVE_MSG_NOSIGNAL
- ret=recv (fd, resp, sizeof(WapiHandleResponse), MSG_NOSIGNAL);
+ do {
+ ret=recv (fd, resp, sizeof(WapiHandleResponse), MSG_NOSIGNAL);
+ }
+ while (ret==-1 && errno==EINTR);
#else
- ret=recv (fd, resp, sizeof(WapiHandleResponse), 0);
+ do {
+ ret=recv (fd, resp, sizeof(WapiHandleResponse), 0);
+ }
+ while (ret==-1 && errno==EINTR);
signal (SIGPIPE, old_sigpipe);
#endif
+
if(ret==-1) {
if(errno==EPIPE) {
g_critical (G_GNUC_PRETTY_FUNCTION ": The handle daemon vanished!");
g_assert_not_reached ();
}
}
+
+ ret = mono_mutex_unlock (&req_mutex);
+ g_assert (ret == 0);
+
+ pthread_cleanup_pop (0);
+}
- pthread_mutex_unlock (&req_mutex);
+/* Send request on fd with filedescriptors, wait for response (called
+ * by applications, not the daemon)
+ */
+void _wapi_daemon_request_response_with_fds (int fd, WapiHandleRequest *req,
+ WapiHandleResponse *resp,
+ int in_fd, int out_fd, int err_fd)
+{
+ struct msghdr msg={0};
+ struct cmsghdr *cmsg;
+ struct iovec iov;
+ char cmsgdata[CMSG_SPACE (sizeof(int)*3)];
+ int *fdptr;
+
+ msg.msg_name=NULL;
+ msg.msg_namelen=0;
+ msg.msg_iov=&iov;
+ msg.msg_iovlen=1;
+ msg.msg_control=cmsgdata;
+ msg.msg_controllen=sizeof(cmsgdata);
+ msg.msg_flags=0;
+
+ iov.iov_base=req;
+ iov.iov_len=sizeof(WapiHandleRequest);
+
+ cmsg=CMSG_FIRSTHDR (&msg);
+ cmsg->cmsg_len=CMSG_LEN (sizeof(int)*3);
+ cmsg->cmsg_level=SOL_SOCKET;
+ cmsg->cmsg_type=SCM_RIGHTS;
+ fdptr=(int *)CMSG_DATA (cmsg);
+ fdptr[0]=in_fd;
+ fdptr[1]=out_fd;
+ fdptr[2]=err_fd;
+
+ msg.msg_controllen=CMSG_SPACE (sizeof(int)*3);
+
+ _wapi_daemon_request_response_internal (fd, &msg, resp);
+}
+
+/* Send request on fd, wait for response (called by applications, not
+ * the daemon)
+ */
+void _wapi_daemon_request_response (int fd, WapiHandleRequest *req,
+ WapiHandleResponse *resp)
+{
+ struct msghdr msg={0};
+ struct iovec iov;
+
+ msg.msg_name=NULL;
+ msg.msg_namelen=0;
+ msg.msg_iov=&iov;
+ msg.msg_iovlen=1;
+ msg.msg_control=NULL;
+ msg.msg_controllen=0;
+ msg.msg_flags=0;
+
+ iov.iov_base=req;
+ iov.iov_len=sizeof(WapiHandleRequest);
+
+ _wapi_daemon_request_response_internal (fd, &msg, resp);
}
/* Read request on fd (called by the daemon) */
-void _wapi_daemon_request (int fd, WapiHandleRequest *req)
+int _wapi_daemon_request (int fd, WapiHandleRequest *req, int *fds,
+ gboolean *has_fds)
{
int ret;
+ struct msghdr msg;
+ struct iovec iov;
+ struct cmsghdr *cmsg;
+ guchar cmsgdata[CMSG_SPACE (sizeof(int)*3)];
+
+ msg.msg_name=NULL;
+ msg.msg_namelen=0;
+ msg.msg_iov=&iov;
+ msg.msg_iovlen=1;
+ msg.msg_control=cmsgdata;
+ msg.msg_controllen=sizeof(cmsgdata);
+ msg.msg_flags=0;
+ iov.iov_base=req;
+ iov.iov_len=sizeof(WapiHandleRequest);
+ do {
#ifdef HAVE_MSG_NOSIGNAL
- ret=recv (fd, req, sizeof(WapiHandleRequest), MSG_NOSIGNAL);
+ ret=recvmsg (fd, &msg, MSG_NOSIGNAL);
#else
- ret=recv (fd, req, sizeof(WapiHandleRequest), 0);
+ ret=recvmsg (fd, &msg, 0);
#endif
+ }
+ while (ret==-1 && errno==EINTR);
+
if(ret==-1 || ret!= sizeof(WapiHandleRequest)) {
/* Make sure we dont do anything with this response */
req->type=WapiHandleRequestType_Error;
#endif
/* The next loop around poll() should tidy up */
}
+
+#ifdef DEBUG
+ if(msg.msg_flags & MSG_OOB) {
+ g_message (G_GNUC_PRETTY_FUNCTION ": OOB data received");
+ }
+ if(msg.msg_flags & MSG_CTRUNC) {
+ g_message (G_GNUC_PRETTY_FUNCTION ": ancillary data was truncated");
+ }
+ g_message (G_GNUC_PRETTY_FUNCTION ": msg.msg_controllen=%d",
+ msg.msg_controllen);
+#endif
+
+ cmsg=CMSG_FIRSTHDR (&msg);
+ if(cmsg!=NULL && cmsg->cmsg_level==SOL_SOCKET &&
+ cmsg->cmsg_type==SCM_RIGHTS) {
+#ifdef DEBUG
+ g_message (G_GNUC_PRETTY_FUNCTION ": cmsg->cmsg_len=%d",
+ cmsg->cmsg_len);
+ g_message (G_GNUC_PRETTY_FUNCTION
+ ": cmsg->level=%d cmsg->type=%d", cmsg->cmsg_level,
+ cmsg->cmsg_type);
+#endif
+
+ memcpy (fds, (int *)CMSG_DATA (cmsg), sizeof(int)*3);
+ *has_fds=TRUE;
+
+#ifdef DEBUG
+ g_message (G_GNUC_PRETTY_FUNCTION
+ ": fd[0]=%d, fd[1]=%d, fd[2]=%d", fds[0], fds[1],
+ fds[2]);
+#endif
+ } else {
+#ifdef DEBUG
+ g_message (G_GNUC_PRETTY_FUNCTION ": no ancillary data");
+#endif
+ *has_fds=FALSE;
+ }
+
+ return(ret);
}
/* Send response on fd (called by the daemon) */
-void _wapi_daemon_response (int fd, WapiHandleResponse *resp)
+int _wapi_daemon_response (int fd, WapiHandleResponse *resp)
{
int ret;
-
+
+ do {
#ifdef HAVE_MSG_NOSIGNAL
- ret=send (fd, resp, sizeof(WapiHandleResponse), MSG_NOSIGNAL);
+ ret=send (fd, resp, sizeof(WapiHandleResponse), MSG_NOSIGNAL);
#else
- ret=send (fd, resp, sizeof(WapiHandleResponse), 0);
+ ret=send (fd, resp, sizeof(WapiHandleResponse), 0);
#endif
+ }
+ while (ret==-1 && errno==EINTR);
+
#ifdef DEBUG
+
if(ret==-1 || ret != sizeof(WapiHandleResponse)) {
g_warning (G_GNUC_PRETTY_FUNCTION ": Send error: %s",
strerror (errno));
/* The next loop around poll() should tidy up */
}
#endif
+
+ return(ret);
}
projects / mono.git / blobdiff