1 files changed, 266 insertions, 0 deletions
diff --git a/bin/auditdistd/proto_socketpair.c b/bin/auditdistd/proto_socketpair.c
new file mode 100644
index 000000000000..8d04c49217e2
--- /dev/null
+++ b/bin/auditdistd/proto_socketpair.c
@@ -0,0 +1,266 @@
+/*-
+ * Copyright (c) 2009-2010 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Pawel Jakub Dawidek under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $P4: //depot/projects/trustedbsd/openbsm/bin/auditdistd/proto_socketpair.c#1 $
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "pjdlog.h"
+#include "proto_impl.h"
+
+#define	SP_CTX_MAGIC	0x50c3741
+struct sp_ctx {
+	int			sp_magic;
+	int			sp_fd[2];
+	int			sp_side;
+#define	SP_SIDE_UNDEF		0
+#define	SP_SIDE_CLIENT		1
+#define	SP_SIDE_SERVER		2
+};
+
+static void sp_close(void *ctx);
+
+static int
+sp_connect(const char *srcaddr, const char *dstaddr, int timeout, void **ctxp)
+{
+	struct sp_ctx *spctx;
+	int error;
+
+	PJDLOG_ASSERT(dstaddr != NULL);
+	PJDLOG_ASSERT(timeout >= -1);
+
+	if (strcmp(dstaddr, "socketpair://") != 0)
+		return (-1);
+
+	PJDLOG_ASSERT(srcaddr == NULL);
+
+	spctx = malloc(sizeof(*spctx));
+	if (spctx == NULL)
+		return (errno);
+
+	if (socketpair(PF_UNIX, SOCK_STREAM, 0, spctx->sp_fd) == -1) {
+		error = errno;
+		free(spctx);
+		return (error);
+	}
+
+	spctx->sp_side = SP_SIDE_UNDEF;
+	spctx->sp_magic = SP_CTX_MAGIC;
+	*ctxp = spctx;
+
+	return (0);
+}
+
+static int
+sp_wrap(int fd, bool client, void **ctxp)
+{
+	struct sp_ctx *spctx;
+
+	PJDLOG_ASSERT(fd >= 0);
+
+	spctx = malloc(sizeof(*spctx));
+	if (spctx == NULL)
+		return (errno);
+
+	if (client) {
+		spctx->sp_side = SP_SIDE_CLIENT;
+		spctx->sp_fd[0] = fd;
+		spctx->sp_fd[1] = -1;
+	} else {
+		spctx->sp_side = SP_SIDE_SERVER;
+		spctx->sp_fd[0] = -1;
+		spctx->sp_fd[1] = fd;
+	}
+	spctx->sp_magic = SP_CTX_MAGIC;
+	*ctxp = spctx;
+
+	return (0);
+}
+
+static int
+sp_send(void *ctx, const unsigned char *data, size_t size, int fd)
+{
+	struct sp_ctx *spctx = ctx;
+	int sock;
+
+	PJDLOG_ASSERT(spctx != NULL);
+	PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
+
+	switch (spctx->sp_side) {
+	case SP_SIDE_UNDEF:
+		/*
+		 * If the first operation done by the caller is proto_send(),
+		 * we assume this is the client.
+		 */
+		/* FALLTHROUGH */
+		spctx->sp_side = SP_SIDE_CLIENT;
+		/* Close other end. */
+		close(spctx->sp_fd[1]);
+		spctx->sp_fd[1] = -1;
+	case SP_SIDE_CLIENT:
+		PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
+		sock = spctx->sp_fd[0];
+		break;
+	case SP_SIDE_SERVER:
+		PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
+		sock = spctx->sp_fd[1];
+		break;
+	default:
+		PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
+	}
+
+	/* Someone is just trying to decide about side. */
+	if (data == NULL)
+		return (0);
+
+	return (proto_common_send(sock, data, size, fd));
+}
+
+static int
+sp_recv(void *ctx, unsigned char *data, size_t size, int *fdp)
+{
+	struct sp_ctx *spctx = ctx;
+	int sock;
+
+	PJDLOG_ASSERT(spctx != NULL);
+	PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
+
+	switch (spctx->sp_side) {
+	case SP_SIDE_UNDEF:
+		/*
+		 * If the first operation done by the caller is proto_recv(),
+		 * we assume this is the server.
+		 */
+		/* FALLTHROUGH */
+		spctx->sp_side = SP_SIDE_SERVER;
+		/* Close other end. */
+		close(spctx->sp_fd[0]);
+		spctx->sp_fd[0] = -1;
+	case SP_SIDE_SERVER:
+		PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
+		sock = spctx->sp_fd[1];
+		break;
+	case SP_SIDE_CLIENT:
+		PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
+		sock = spctx->sp_fd[0];
+		break;
+	default:
+		PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
+	}
+
+	/* Someone is just trying to decide about side. */
+	if (data == NULL)
+		return (0);
+
+	return (proto_common_recv(sock, data, size, fdp));
+}
+
+static int
+sp_descriptor(const void *ctx)
+{
+	const struct sp_ctx *spctx = ctx;
+
+	PJDLOG_ASSERT(spctx != NULL);
+	PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
+	PJDLOG_ASSERT(spctx->sp_side == SP_SIDE_CLIENT ||
+	    spctx->sp_side == SP_SIDE_SERVER);
+
+	switch (spctx->sp_side) {
+	case SP_SIDE_CLIENT:
+		PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
+		return (spctx->sp_fd[0]);
+	case SP_SIDE_SERVER:
+		PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
+		return (spctx->sp_fd[1]);
+	}
+
+	PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
+}
+
+static void
+sp_close(void *ctx)
+{
+	struct sp_ctx *spctx = ctx;
+
+	PJDLOG_ASSERT(spctx != NULL);
+	PJDLOG_ASSERT(spctx->sp_magic == SP_CTX_MAGIC);
+
+	switch (spctx->sp_side) {
+	case SP_SIDE_UNDEF:
+		PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
+		close(spctx->sp_fd[0]);
+		spctx->sp_fd[0] = -1;
+		PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
+		close(spctx->sp_fd[1]);
+		spctx->sp_fd[1] = -1;
+		break;
+	case SP_SIDE_CLIENT:
+		PJDLOG_ASSERT(spctx->sp_fd[0] >= 0);
+		close(spctx->sp_fd[0]);
+		spctx->sp_fd[0] = -1;
+		PJDLOG_ASSERT(spctx->sp_fd[1] == -1);
+		break;
+	case SP_SIDE_SERVER:
+		PJDLOG_ASSERT(spctx->sp_fd[1] >= 0);
+		close(spctx->sp_fd[1]);
+		spctx->sp_fd[1] = -1;
+		PJDLOG_ASSERT(spctx->sp_fd[0] == -1);
+		break;
+	default:
+		PJDLOG_ABORT("Invalid socket side (%d).", spctx->sp_side);
+	}
+
+	spctx->sp_magic = 0;
+	free(spctx);
+}
+
+static struct proto sp_proto = {
+	.prt_name = "socketpair",
+	.prt_connect = sp_connect,
+	.prt_wrap = sp_wrap,
+	.prt_send = sp_send,
+	.prt_recv = sp_recv,
+	.prt_descriptor = sp_descriptor,
+	.prt_close = sp_close
+};
+
+static __constructor void
+sp_ctor(void)
+{
+
+	proto_register(&sp_proto, false);
+}