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-rw-r--r--libkdenetwork/libgpgme-copy/assuan/assuan-uds.c311
1 files changed, 311 insertions, 0 deletions
diff --git a/libkdenetwork/libgpgme-copy/assuan/assuan-uds.c b/libkdenetwork/libgpgme-copy/assuan/assuan-uds.c
new file mode 100644
index 000000000..77945fb50
--- /dev/null
+++ b/libkdenetwork/libgpgme-copy/assuan/assuan-uds.c
@@ -0,0 +1,311 @@
+/* assuan-uds.c - Assuan unix domain socket utilities
+ * Copyright (C) 2006 Free Software Foundation, Inc.
+ *
+ * This file is part of Assuan.
+ *
+ * Assuan is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Assuan is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#ifndef HAVE_W32_SYSTEM
+#include <sys/socket.h>
+#include <sys/un.h>
+#else
+#include <windows.h>
+#endif
+#if HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <assert.h>
+
+#include "assuan-defs.h"
+
+#ifdef USE_DESCRIPTOR_PASSING
+/* Provide replacement for missing CMSG maccros. We assume that
+ size_t matches the alignment requirement. */
+#define MY_ALIGN(n) ((((n))+ sizeof(size_t)-1) & (size_t)~(sizeof(size_t)-1))
+#ifndef CMSG_SPACE
+#define CMSG_SPACE(n) (MY_ALIGN(sizeof(struct cmsghdr)) + MY_ALIGN((n)))
+#endif
+#ifndef CMSG_LEN
+#define CMSG_LEN(n) (MY_ALIGN(sizeof(struct cmsghdr)) + (n))
+#endif
+#ifndef CMSG_FIRSTHDR
+#define CMSG_FIRSTHDR(mhdr) \
+ ((size_t)(mhdr)->msg_controllen >= sizeof (struct cmsghdr) \
+ ? (struct cmsghdr*) (mhdr)->msg_control : (struct cmsghdr*)NULL)
+#endif
+#ifndef CMSG_DATA
+#define CMSG_DATA(cmsg) ((unsigned char*)((struct cmsghdr*)(cmsg)+1))
+#endif
+#endif /*USE_DESCRIPTOR_PASSING*/
+
+
+/* Read from a unix domain socket using sendmsg.
+
+ FIXME: We don't need the buffering. It is a leftover from the time
+ when we used datagrams. */
+static ssize_t
+uds_reader (assuan_context_t ctx, void *buf, size_t buflen)
+{
+ int len = ctx->uds.buffersize;
+
+#ifndef HAVE_W32_SYSTEM
+ if (!ctx->uds.bufferallocated)
+ {
+ ctx->uds.buffer = xtrymalloc (2048);
+ if (!ctx->uds.buffer)
+ return _assuan_error (ASSUAN_Out_Of_Core);
+ ctx->uds.bufferallocated = 2048;
+ }
+
+ while (!len) /* No data is buffered. */
+ {
+ struct msghdr msg;
+ struct iovec iovec;
+#ifdef USE_DESCRIPTOR_PASSING
+ union {
+ struct cmsghdr cm;
+ char control[CMSG_SPACE(sizeof (int))];
+ } control_u;
+ struct cmsghdr *cmptr;
+#endif /*USE_DESCRIPTOR_PASSING*/
+
+ memset (&msg, 0, sizeof (msg));
+
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iov = &iovec;
+ msg.msg_iovlen = 1;
+ iovec.iov_base = ctx->uds.buffer;
+ iovec.iov_len = ctx->uds.bufferallocated;
+#ifdef USE_DESCRIPTOR_PASSING
+ msg.msg_control = control_u.control;
+ msg.msg_controllen = sizeof (control_u.control);
+#endif
+
+ len = _assuan_simple_recvmsg (ctx, &msg);
+ if (len < 0)
+ return -1;
+
+ ctx->uds.buffersize = len;
+ ctx->uds.bufferoffset = 0;
+
+#ifdef USE_DESCRIPTOR_PASSING
+ cmptr = CMSG_FIRSTHDR (&msg);
+ if (cmptr && cmptr->cmsg_len == CMSG_LEN (sizeof(int)))
+ {
+ if (cmptr->cmsg_level != SOL_SOCKET
+ || cmptr->cmsg_type != SCM_RIGHTS)
+ _assuan_log_printf ("unexpected ancillary data received\n");
+ else
+ {
+ int fd = *((int*)CMSG_DATA (cmptr));
+
+ if (ctx->uds.pendingfdscount >= DIM (ctx->uds.pendingfds))
+ {
+ _assuan_log_printf ("too many descriptors pending - "
+ "closing received descriptor %d\n", fd);
+ _assuan_close (fd);
+ }
+ else
+ ctx->uds.pendingfds[ctx->uds.pendingfdscount++] = fd;
+ }
+ }
+#endif /*USE_DESCRIPTOR_PASSING*/
+ }
+
+#else /*HAVE_W32_SYSTEM*/
+
+ len = recvfrom (ctx->inbound.fd, buf, buflen, 0, NULL, NULL);
+
+#endif /*HAVE_W32_SYSTEM*/
+
+ /* Return some data to the user. */
+
+ if (len > buflen) /* We have more than the user requested. */
+ len = buflen;
+
+ memcpy (buf, ctx->uds.buffer + ctx->uds.bufferoffset, len);
+ ctx->uds.buffersize -= len;
+ assert (ctx->uds.buffersize >= 0);
+ ctx->uds.bufferoffset += len;
+ assert (ctx->uds.bufferoffset <= ctx->uds.bufferallocated);
+
+ return len;
+}
+
+
+/* Write to the domain server. */
+static ssize_t
+uds_writer (assuan_context_t ctx, const void *buf, size_t buflen)
+{
+#ifndef HAVE_W32_SYSTEM
+ struct msghdr msg;
+ struct iovec iovec;
+ ssize_t len;
+
+ memset (&msg, 0, sizeof (msg));
+
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iovlen = 1;
+ msg.msg_iov = &iovec;
+ iovec.iov_base = (void*)buf;
+ iovec.iov_len = buflen;
+
+ len = _assuan_simple_sendmsg (ctx, &msg);
+#else /*HAVE_W32_SYSTEM*/
+ int len;
+
+ len = sendto (ctx->outbound.fd, buf, buflen, 0,
+ (struct sockaddr *)&ctx->serveraddr,
+ sizeof (struct sockaddr_in));
+#endif /*HAVE_W32_SYSTEM*/
+ return len;
+}
+
+
+static assuan_error_t
+uds_sendfd (assuan_context_t ctx, int fd)
+{
+#ifdef USE_DESCRIPTOR_PASSING
+ struct msghdr msg;
+ struct iovec iovec;
+ union {
+ struct cmsghdr cm;
+ char control[CMSG_SPACE(sizeof (int))];
+ } control_u;
+ struct cmsghdr *cmptr;
+ int len;
+ char buffer[80];
+
+ /* We need to send some real data so that a read won't return 0
+ which will be taken as an EOF. It also helps with debugging. */
+ snprintf (buffer, sizeof(buffer)-1, "# descriptor %d is in flight\n", fd);
+ buffer[sizeof(buffer)-1] = 0;
+
+ memset (&msg, 0, sizeof (msg));
+
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iovlen = 1;
+ msg.msg_iov = &iovec;
+ iovec.iov_base = buffer;
+ iovec.iov_len = strlen (buffer);
+
+ msg.msg_control = control_u.control;
+ msg.msg_controllen = sizeof (control_u.control);
+ cmptr = CMSG_FIRSTHDR (&msg);
+ cmptr->cmsg_len = CMSG_LEN(sizeof(int));
+ cmptr->cmsg_level = SOL_SOCKET;
+ cmptr->cmsg_type = SCM_RIGHTS;
+ *((int*)CMSG_DATA (cmptr)) = fd;
+
+ len = _assuan_simple_sendmsg (ctx, &msg);
+ if (len < 0)
+ {
+ _assuan_log_printf ("uds_sendfd: %s\n", strerror (errno));
+ return _assuan_error (ASSUAN_Write_Error);
+ }
+ else
+ return 0;
+#else
+ return _assuan_error (ASSUAN_Not_Implemented);
+#endif
+}
+
+
+static assuan_error_t
+uds_receivefd (assuan_context_t ctx, int *fd)
+{
+#ifdef USE_DESCRIPTOR_PASSING
+ int i;
+
+ if (!ctx->uds.pendingfdscount)
+ {
+ _assuan_log_printf ("no pending file descriptors!\n");
+ return _assuan_error (ASSUAN_General_Error);
+ }
+ assert (ctx->uds.pendingfdscount <= DIM(ctx->uds.pendingfds));
+
+ *fd = ctx->uds.pendingfds[0];
+ for (i=1; i < ctx->uds.pendingfdscount; i++)
+ ctx->uds.pendingfds[i-1] = ctx->uds.pendingfds[i];
+ ctx->uds.pendingfdscount--;
+
+ return 0;
+#else
+ return _assuan_error (ASSUAN_Not_Implemented);
+#endif
+}
+
+
+/* Close all pending fds. */
+void
+_assuan_uds_close_fds (assuan_context_t ctx)
+{
+ int i;
+
+ for (i = 0; i < ctx->uds.pendingfdscount; i++)
+ _assuan_close (ctx->uds.pendingfds[i]);
+ ctx->uds.pendingfdscount = 0;
+}
+
+/* Deinitialize the unix domain socket I/O functions. */
+void
+_assuan_uds_deinit (assuan_context_t ctx)
+{
+ /* First call the finish_handler which should close descriptors etc. */
+ ctx->finish_handler (ctx);
+
+ if (ctx->uds.buffer)
+ {
+ assert (ctx->uds.bufferallocated);
+ ctx->uds.bufferallocated = 0;
+ xfree (ctx->uds.buffer);
+ }
+
+ _assuan_uds_close_fds (ctx);
+}
+
+
+/* Helper function to initialize a context for domain I/O. */
+void
+_assuan_init_uds_io (assuan_context_t ctx)
+{
+ static struct assuan_io io = { uds_reader, uds_writer,
+ uds_sendfd, uds_receivefd };
+
+ ctx->io = &io;
+ ctx->uds.buffer = 0;
+ ctx->uds.bufferoffset = 0;
+ ctx->uds.buffersize = 0;
+ ctx->uds.bufferallocated = 0;
+ ctx->uds.pendingfdscount = 0;
+}
+
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