1 files changed, 400 insertions, 0 deletions
diff --git a/ctdb/protocol/protocol_basic.c b/ctdb/protocol/protocol_basic.c
new file mode 100644
index 0000000..42f2077
--- /dev/null
+++ b/ctdb/protocol/protocol_basic.c
@@ -0,0 +1,400 @@
+/*
+   CTDB protocol marshalling
+
+   Copyright (C) Amitay Isaacs  2015-2017
+
+   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 "replace.h"
+#include "system/network.h"
+
+#include <talloc.h>
+
+#include "protocol_basic.h"
+
+/*
+ * Basic data types
+ */
+
+size_t ctdb_uint8_len(uint8_t *in)
+{
+	return sizeof(uint8_t);
+}
+
+void ctdb_uint8_push(uint8_t *in, uint8_t *buf, size_t *npush)
+{
+	*buf = *in;
+	*npush = sizeof(uint8_t);
+}
+
+int ctdb_uint8_pull(uint8_t *buf, size_t buflen, uint8_t *out, size_t *npull)
+{
+	if (buflen < sizeof(uint8_t)) {
+		return EMSGSIZE;
+	}
+
+	*out = *buf;
+	*npull = sizeof(uint8_t);
+	return 0;
+}
+
+size_t ctdb_uint16_len(uint16_t *in)
+{
+	return sizeof(uint16_t);
+}
+
+void ctdb_uint16_push(uint16_t *in, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, sizeof(uint16_t));
+	*npush = sizeof(uint16_t);
+}
+
+int ctdb_uint16_pull(uint8_t *buf, size_t buflen, uint16_t *out, size_t *npull)
+{
+	if (buflen < sizeof(uint16_t)) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, sizeof(uint16_t));
+	*npull = sizeof(uint16_t);
+	return 0;
+}
+
+size_t ctdb_int32_len(int32_t *in)
+{
+	return sizeof(int32_t);
+}
+
+void ctdb_int32_push(int32_t *in, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, sizeof(int32_t));
+	*npush = sizeof(int32_t);
+}
+
+int ctdb_int32_pull(uint8_t *buf, size_t buflen, int32_t *out, size_t *npull)
+{
+	if (buflen < sizeof(int32_t)) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, sizeof(int32_t));
+	*npull = sizeof(int32_t);
+	return 0;
+}
+
+size_t ctdb_uint32_len(uint32_t *in)
+{
+	return sizeof(uint32_t);
+}
+
+void ctdb_uint32_push(uint32_t *in, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, sizeof(uint32_t));
+	*npush = sizeof(uint32_t);
+}
+
+int ctdb_uint32_pull(uint8_t *buf, size_t buflen, uint32_t *out, size_t *npull)
+{
+	if (buflen < sizeof(uint32_t)) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, sizeof(uint32_t));
+	*npull = sizeof(uint32_t);
+	return 0;
+}
+
+size_t ctdb_uint64_len(uint64_t *in)
+{
+	return sizeof(uint64_t);
+}
+
+void ctdb_uint64_push(uint64_t *in, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, sizeof(uint64_t));
+	*npush = sizeof(uint64_t);
+}
+
+int ctdb_uint64_pull(uint8_t *buf, size_t buflen, uint64_t *out, size_t *npull)
+{
+	if (buflen < sizeof(uint64_t)) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, sizeof(uint64_t));
+	*npull = sizeof(uint64_t);
+	return 0;
+}
+
+size_t ctdb_double_len(double *in)
+{
+	return sizeof(double);
+}
+
+void ctdb_double_push(double *in, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, sizeof(double));
+	*npush = sizeof(double);
+}
+
+int ctdb_double_pull(uint8_t *buf, size_t buflen, double *out, size_t *npull)
+{
+	if (buflen < sizeof(double)) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, sizeof(double));
+	*npull = sizeof(double);
+	return 0;
+}
+
+size_t ctdb_bool_len(bool *in)
+{
+	uint8_t u8 = 0;
+
+	return ctdb_uint8_len(&u8);
+}
+
+void ctdb_bool_push(bool *in, uint8_t *buf, size_t *npush)
+{
+	size_t np;
+	uint8_t u8 = *in;
+
+	ctdb_uint8_push(&u8, buf, &np);
+	*npush = np;
+}
+
+int ctdb_bool_pull(uint8_t *buf, size_t buflen, bool *out, size_t *npull)
+{
+	size_t np;
+	uint8_t u8;
+	int ret;
+
+	ret = ctdb_uint8_pull(buf, buflen, &u8, &np);
+	if (ret != 0) {
+		return ret;
+	}
+
+	if (u8 == 0) {
+		*out = false;
+	} else if (u8 == 1) {
+		*out = true;
+	} else {
+		return EINVAL;
+	}
+
+	*npull = np;
+	return 0;
+}
+
+size_t ctdb_chararray_len(char *in, size_t len)
+{
+	return len;
+}
+
+void ctdb_chararray_push(char *in, size_t len, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, len);
+	*npush = len;
+}
+
+int ctdb_chararray_pull(uint8_t *buf, size_t buflen, char *out, size_t len,
+			size_t *npull)
+{
+	if (buflen < len) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, len);
+	out[len-1] = '\0';
+	*npull = len;
+	return 0;
+}
+
+size_t ctdb_string_len(const char **in)
+{
+	if (*in == NULL) {
+		return 0;
+	}
+
+	return strlen(*in) + 1;
+}
+
+void ctdb_string_push(const char **in, uint8_t *buf, size_t *npush)
+{
+	size_t len;
+
+	len = ctdb_string_len(in);
+	if (len > 0) {
+		memcpy(buf, *in, len);
+	}
+
+	*npush = len;
+}
+
+int ctdb_string_pull(uint8_t *buf, size_t buflen, TALLOC_CTX *mem_ctx,
+		     const char **out, size_t *npull)
+{
+	const char *str;
+
+	if (buflen > UINT32_MAX) {
+		return EMSGSIZE;
+	}
+
+	if (buflen == 0) {
+		*out = NULL;
+		*npull = 0;
+		return 0;
+	}
+
+	str = talloc_strndup(mem_ctx, (char *)buf, buflen);
+	if (str == NULL) {
+		return ENOMEM;
+	}
+
+	*out = str;
+	*npull = ctdb_string_len(&str);
+	return 0;
+}
+
+size_t ctdb_stringn_len(const char **in)
+{
+	uint32_t u32 = ctdb_string_len(in);
+
+	return ctdb_uint32_len(&u32) + u32;
+}
+
+void ctdb_stringn_push(const char **in, uint8_t *buf, size_t *npush)
+{
+	size_t offset = 0, np;
+	uint32_t u32 = ctdb_string_len(in);
+
+	ctdb_uint32_push(&u32, buf+offset, &np);
+	offset += np;
+
+	ctdb_string_push(in, buf+offset, &np);
+	offset += np;
+
+	*npush = offset;
+}
+
+int ctdb_stringn_pull(uint8_t *buf, size_t buflen, TALLOC_CTX *mem_ctx,
+		      const char **out, size_t *npull)
+{
+	size_t offset = 0, np;
+	uint32_t u32;
+	int ret;
+
+	ret = ctdb_uint32_pull(buf+offset, buflen-offset, &u32, &np);
+	if (ret != 0) {
+		return ret;
+	}
+	offset += np;
+
+	if (buflen-offset < u32) {
+		return EMSGSIZE;
+	}
+
+	ret = ctdb_string_pull(buf+offset, u32, mem_ctx, out, &np);
+	if (ret != 0) {
+		return ret;
+	}
+	offset += np;
+
+	*npull = offset;
+	return 0;
+}
+
+/*
+ * System defined data types
+ */
+
+size_t ctdb_pid_len(pid_t *in)
+{
+	return sizeof(pid_t);
+}
+
+void ctdb_pid_push(pid_t *in, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, sizeof(pid_t));
+	*npush = sizeof(pid_t);
+}
+
+int ctdb_pid_pull(uint8_t *buf, size_t buflen, pid_t *out, size_t *npull)
+{
+	if (buflen < sizeof(pid_t)) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, sizeof(pid_t));
+	*npull = sizeof(pid_t);
+	return 0;
+}
+
+size_t ctdb_timeval_len(struct timeval *in)
+{
+	return sizeof(struct timeval);
+}
+
+void ctdb_timeval_push(struct timeval *in, uint8_t *buf, size_t *npush)
+{
+	memcpy(buf, in, sizeof(struct timeval));
+	*npush = sizeof(struct timeval);
+}
+
+int ctdb_timeval_pull(uint8_t *buf, size_t buflen, struct timeval *out,
+		      size_t *npull)
+{
+	if (buflen < sizeof(struct timeval)) {
+		return EMSGSIZE;
+	}
+
+	memcpy(out, buf, sizeof(struct timeval));
+	*npull = sizeof(struct timeval);
+	return 0;
+}
+
+/*
+ * Dummy type to tackle structure padding
+ */
+
+size_t ctdb_padding_len(int count)
+{
+	return count % SIZEOF_VOID_P;
+}
+
+void ctdb_padding_push(int count, uint8_t *buf, size_t *npush)
+{
+	uint8_t padding[count];
+	size_t aligned_count = count % SIZEOF_VOID_P;
+
+	if (aligned_count > 0) {
+		memset(padding, 0, aligned_count);
+		memcpy(buf, padding, aligned_count);
+	}
+	*npush = aligned_count;
+}
+
+int ctdb_padding_pull(uint8_t *buf, size_t buflen, int count, size_t *npull)
+{
+	size_t aligned_count = count % SIZEOF_VOID_P;
+
+	if (buflen < aligned_count) {
+		return EMSGSIZE;
+	}
+
+	*npull = aligned_count;
+	return 0;
+}