ctdb-protocol: Add protocol marshalling for CTDB_REQ_TUNNEL

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>

3 files changed, 175 insertions, 0 deletions

diff --git a/ctdb/protocol/protocol_api.h b/ctdb/protocol/protocol_api.h
index 0e5d57fdece..8b40d1d8c0e 100644
--- a/ctdb/protocol/protocol_api.h
+++ b/ctdb/protocol/protocol_api.h
@@ -653,6 +653,20 @@ int ctdb_req_keepalive_pull(uint8_t *buf, size_t buflen,
 			    TALLOC_CTX *mem_ctx,
 			    struct ctdb_req_keepalive *c);
 
+/* From protocol/protocol_tunnel.c */
+
+size_t ctdb_req_tunnel_len(struct ctdb_req_header *h,
+			   struct ctdb_req_tunnel *c);
+
+int ctdb_req_tunnel_push(struct ctdb_req_header *h,
+			 struct ctdb_req_tunnel *c,
+			 uint8_t *buf, size_t *buflen);
+
+int ctdb_req_tunnel_pull(uint8_t *buf, size_t buflen,
+			 struct ctdb_req_header *h,
+			 TALLOC_CTX *mem_ctx,
+			 struct ctdb_req_tunnel *c);
+
 /* From protocol/protocol_event.c */
 
 size_t ctdb_event_request_len(struct ctdb_event_request *in);
diff --git a/ctdb/protocol/protocol_debug.c b/ctdb/protocol/protocol_debug.c
index 1a87ade3419..3dd5c32ab11 100644
--- a/ctdb/protocol/protocol_debug.c
+++ b/ctdb/protocol/protocol_debug.c
@@ -354,6 +354,24 @@ static void ctdb_srvid_print(uint64_t srvid, FILE *fp)
 	}
 }
 
+static void ctdb_tunnel_id_print(uint64_t tunnel_id, FILE *fp)
+{
+	fprintf(fp, "0x%"PRIx64, tunnel_id);
+}
+
+static void ctdb_tunnel_flags_print(uint32_t flags, FILE *fp)
+{
+	if (flags & CTDB_TUNNEL_FLAG_REQUEST) {
+		fprintf(fp, "REQUEST ");
+	}
+	if (flags & CTDB_TUNNEL_FLAG_REPLY) {
+		fprintf(fp, "REPLY ");
+	}
+	if (flags & CTDB_TUNNEL_FLAG_NOREPLY) {
+		fprintf(fp, "NOREPLY ");
+	}
+}
+
 /*
  * Print routines
  */
@@ -472,6 +490,16 @@ static void ctdb_req_keepalive_print(struct ctdb_req_keepalive *c, FILE *fp)
 	fprintf(fp, "\n");
 }
 
+static void ctdb_req_tunnel_print(struct ctdb_req_tunnel *c, FILE *fp)
+{
+	fprintf(fp, "Data\n");
+	fprintf(fp, "  tunnel_id:");
+	ctdb_tunnel_id_print(c->tunnel_id, fp);
+	ctdb_tunnel_flags_print(c->flags, fp);
+	tdb_data_print(c->data, fp);
+	fprintf(fp, "\n");
+}
+
 /*
  * Parse routines
  */
@@ -611,6 +639,21 @@ static void ctdb_req_keepalive_parse(uint8_t *buf, size_t buflen, FILE *fp,
 	ctdb_req_keepalive_print(&c, fp);
 }
 
+static void ctdb_req_tunnel_parse(uint8_t *buf, size_t buflen, FILE *fp,
+				  TALLOC_CTX *mem_ctx)
+{
+	struct ctdb_req_tunnel c;
+	int ret;
+
+	ret = ctdb_req_tunnel_pull(buf, buflen, NULL, mem_ctx, &c);
+	if (ret != 0) {
+		fprintf(fp, "Failed to parse CTDB_REQ_TUNNEL\n");
+		return;
+	}
+
+	ctdb_req_tunnel_print(&c, fp);
+}
+
 /*
  * Packet print
  */
@@ -679,6 +722,10 @@ void ctdb_packet_print(uint8_t *buf, size_t buflen, FILE *fp)
 			ctdb_req_keepalive_parse(buf, buflen, fp, mem_ctx);
 			break;
 
+		case CTDB_REQ_TUNNEL:
+			ctdb_req_tunnel_parse(buf, buflen, fp, mem_ctx);
+			break;
+
 		default:
 			fprintf(fp, "Invalid ctdb operation\n");
 			break;
diff --git a/ctdb/protocol/protocol_tunnel.c b/ctdb/protocol/protocol_tunnel.c
new file mode 100644
index 00000000000..d31d9d50f01
--- /dev/null
+++ b/ctdb/protocol/protocol_tunnel.c
@@ -0,0 +1,114 @@
+/*
+   CTDB protocol marshalling
+
+   Copyright (C) Amitay Isaacs  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 <tdb.h>
+
+#include "protocol.h"
+#include "protocol_api.h"
+#include "protocol_private.h"
+
+size_t ctdb_req_tunnel_len(struct ctdb_req_header *h,
+			   struct ctdb_req_tunnel *c)
+{
+	return ctdb_req_header_len(h) +
+		ctdb_uint64_len(&c->tunnel_id) +
+		ctdb_uint32_len(&c->flags) +
+		ctdb_tdb_datan_len(&c->data);
+}
+
+int ctdb_req_tunnel_push(struct ctdb_req_header *h,
+			 struct ctdb_req_tunnel *c,
+			 uint8_t *buf, size_t *buflen)
+{
+	size_t length, offset = 0, np;
+
+	length = ctdb_req_tunnel_len(h, c);
+	if (*buflen < length) {
+		*buflen = length;
+		return EMSGSIZE;
+	}
+
+	h->length = *buflen;
+	ctdb_req_header_push(h, buf, &np);
+	offset += np;
+
+	ctdb_uint64_push(&c->tunnel_id, buf+offset, &np);
+	offset += np;
+
+	ctdb_uint32_push(&c->flags, buf+offset, &np);
+	offset += np;
+
+	ctdb_tdb_datan_push(&c->data, buf+offset, &np);
+	offset += np;
+
+	if (offset > *buflen) {
+		return EMSGSIZE;
+	}
+
+	return 0;
+}
+
+int ctdb_req_tunnel_pull(uint8_t *buf, size_t buflen,
+			 struct ctdb_req_header *h,
+			 TALLOC_CTX *mem_ctx,
+			 struct ctdb_req_tunnel *c)
+{
+	struct ctdb_req_header header;
+	size_t offset = 0, np;
+	int ret;
+
+	ret = ctdb_req_header_pull(buf, buflen, &header, &np);
+	if (ret != 0) {
+		return ret;
+	}
+	offset += np;
+
+	if (h != NULL) {
+		*h = header;
+	}
+
+	ret = ctdb_uint64_pull(buf+offset, buflen-offset, &c->tunnel_id, &np);
+	if (ret != 0) {
+		return ret;
+	}
+	offset += np;
+
+	ret = ctdb_uint32_pull(buf+offset, buflen-offset, &c->flags, &np);
+	if (ret != 0) {
+		return ret;
+	}
+	offset += np;
+
+	ret = ctdb_tdb_datan_pull(buf+offset, buflen-offset, mem_ctx,
+				  &c->data, &np);
+	if (ret != 0) {
+		return ret;
+	}
+	offset += np;
+
+	if (offset > buflen) {
+		return EMSGSIZE;
+	}
+
+	return 0;
+}