s3-ctdb Rename packet file and files to ctdb_packet

This avoids a conflicts with the Samba4 packet.c, as these is only
used in CTDB

Andrew Bartlett

1 files changed, 274 insertions, 0 deletions

diff --git a/source3/lib/ctdb_packet.c b/source3/lib/ctdb_packet.c
new file mode 100644
index 0000000000..772fcec421
--- /dev/null
+++ b/source3/lib/ctdb_packet.c
@@ -0,0 +1,274 @@
+/*
+   Unix SMB/CIFS implementation.
+   CTDB Packet handling
+   Copyright (C) Volker Lendecke 2007
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "../lib/util/select.h"
+#include "system/filesys.h"
+#include "system/select.h"
+#include "ctdb_packet.h"
+
+struct ctdb_packet_context {
+	int fd;
+	DATA_BLOB in, out;
+};
+
+/*
+ * Close the underlying fd
+ */
+static int ctdb_packet_context_destructor(struct ctdb_packet_context *ctx)
+{
+	return close(ctx->fd);
+}
+
+/*
+ * Initialize a ctdb_packet context. The fd is given to the ctdb_packet context, meaning
+ * that it is automatically closed when the ctdb_packet context is freed.
+ */
+struct ctdb_packet_context *ctdb_packet_init(TALLOC_CTX *mem_ctx, int fd)
+{
+	struct ctdb_packet_context *result;
+
+	if (!(result = TALLOC_ZERO_P(mem_ctx, struct ctdb_packet_context))) {
+		return NULL;
+	}
+
+	result->fd = fd;
+	talloc_set_destructor(result, ctdb_packet_context_destructor);
+	return result;
+}
+
+/*
+ * Pull data from the fd
+ */
+NTSTATUS ctdb_packet_fd_read(struct ctdb_packet_context *ctx)
+{
+	int res, available;
+	size_t new_size;
+	uint8 *in;
+
+	res = ioctl(ctx->fd, FIONREAD, &available);
+
+	if (res == -1) {
+		DEBUG(10, ("ioctl(FIONREAD) failed: %s\n", strerror(errno)));
+		return map_nt_error_from_unix(errno);
+	}
+
+	SMB_ASSERT(available >= 0);
+
+	if (available == 0) {
+		return NT_STATUS_END_OF_FILE;
+	}
+
+	new_size = ctx->in.length + available;
+
+	if (new_size < ctx->in.length) {
+		DEBUG(0, ("integer wrap\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	if (!(in = TALLOC_REALLOC_ARRAY(ctx, ctx->in.data, uint8, new_size))) {
+		DEBUG(10, ("talloc failed\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ctx->in.data = in;
+
+	res = recv(ctx->fd, in + ctx->in.length, available, 0);
+
+	if (res < 0) {
+		DEBUG(10, ("recv failed: %s\n", strerror(errno)));
+		return map_nt_error_from_unix(errno);
+	}
+
+	if (res == 0) {
+		return NT_STATUS_END_OF_FILE;
+	}
+
+	ctx->in.length += res;
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS ctdb_packet_fd_read_sync(struct ctdb_packet_context *ctx, int timeout)
+{
+	int res, revents;
+
+	res = poll_one_fd(ctx->fd, POLLIN|POLLHUP, timeout, &revents);
+	if (res == 0) {
+		DEBUG(10, ("poll timed out\n"));
+		return NT_STATUS_IO_TIMEOUT;
+	}
+
+	if (res == -1) {
+		DEBUG(10, ("poll returned %s\n", strerror(errno)));
+		return map_nt_error_from_unix(errno);
+	}
+	if ((revents & (POLLIN|POLLHUP|POLLERR)) == 0) {
+		DEBUG(10, ("socket not readable\n"));
+		return NT_STATUS_IO_TIMEOUT;
+	}
+
+	return ctdb_packet_fd_read(ctx);
+}
+
+bool ctdb_packet_handler(struct ctdb_packet_context *ctx,
+		    bool (*full_req)(const uint8_t *buf,
+				     size_t available,
+				     size_t *length,
+				     void *priv),
+		    NTSTATUS (*callback)(uint8_t *buf, size_t length,
+					 void *priv),
+		    void *priv, NTSTATUS *status)
+{
+	size_t length;
+	uint8_t *buf;
+
+	if (!full_req(ctx->in.data, ctx->in.length, &length, priv)) {
+		return False;
+	}
+
+	if (length > ctx->in.length) {
+		*status = NT_STATUS_INTERNAL_ERROR;
+		return true;
+	}
+
+	if (length == ctx->in.length) {
+		buf = ctx->in.data;
+		ctx->in.data = NULL;
+		ctx->in.length = 0;
+	} else {
+		buf = (uint8_t *)TALLOC_MEMDUP(ctx, ctx->in.data, length);
+		if (buf == NULL) {
+			*status = NT_STATUS_NO_MEMORY;
+			return true;
+		}
+
+		memmove(ctx->in.data, ctx->in.data + length,
+			ctx->in.length - length);
+		ctx->in.length -= length;
+	}
+
+	*status = callback(buf, length, priv);
+	return True;
+}
+
+/*
+ * How many bytes of outgoing data do we have pending?
+ */
+size_t ctdb_packet_outgoing_bytes(struct ctdb_packet_context *ctx)
+{
+	return ctx->out.length;
+}
+
+/*
+ * Push data to the fd
+ */
+NTSTATUS ctdb_packet_fd_write(struct ctdb_packet_context *ctx)
+{
+	ssize_t sent;
+
+	sent = send(ctx->fd, ctx->out.data, ctx->out.length, 0);
+
+	if (sent == -1) {
+		DEBUG(0, ("send failed: %s\n", strerror(errno)));
+		return map_nt_error_from_unix(errno);
+	}
+
+	memmove(ctx->out.data, ctx->out.data + sent,
+		ctx->out.length - sent);
+	ctx->out.length -= sent;
+
+	return NT_STATUS_OK;
+}
+
+/*
+ * Sync flush all outgoing bytes
+ */
+NTSTATUS ctdb_packet_flush(struct ctdb_packet_context *ctx)
+{
+	while (ctx->out.length != 0) {
+		NTSTATUS status = ctdb_packet_fd_write(ctx);
+		if (!NT_STATUS_IS_OK(status)) {
+			return status;
+		}
+	}
+	return NT_STATUS_OK;
+}
+
+/*
+ * Send a list of DATA_BLOBs
+ *
+ * Example:  ctdb_packet_send(ctx, 2, data_blob_const(&size, sizeof(size)),
+ *			 data_blob_const(buf, size));
+ */
+NTSTATUS ctdb_packet_send(struct ctdb_packet_context *ctx, int num_blobs, ...)
+{
+	va_list ap;
+	int i;
+	size_t len;
+	uint8 *out;
+
+	len = ctx->out.length;
+
+	va_start(ap, num_blobs);
+	for (i=0; i<num_blobs; i++) {
+		size_t tmp;
+		DATA_BLOB blob = va_arg(ap, DATA_BLOB);
+
+		tmp = len + blob.length;
+		if (tmp < len) {
+			DEBUG(0, ("integer overflow\n"));
+			va_end(ap);
+			return NT_STATUS_NO_MEMORY;
+		}
+		len = tmp;
+	}
+	va_end(ap);
+
+	if (len == 0) {
+		return NT_STATUS_OK;
+	}
+
+	if (!(out = TALLOC_REALLOC_ARRAY(ctx, ctx->out.data, uint8, len))) {
+		DEBUG(0, ("talloc failed\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ctx->out.data = out;
+
+	va_start(ap, num_blobs);
+	for (i=0; i<num_blobs; i++) {
+		DATA_BLOB blob = va_arg(ap, DATA_BLOB);
+
+		memcpy(ctx->out.data+ctx->out.length, blob.data, blob.length);
+		ctx->out.length += blob.length;
+	}
+	va_end(ap);
+
+	SMB_ASSERT(ctx->out.length == len);
+	return NT_STATUS_OK;
+}
+
+/*
+ * Get the ctdb_packet context's file descriptor
+ */
+int ctdb_packet_get_fd(struct ctdb_packet_context *ctx)
+{
+	return ctx->fd;
+}