Protocol: more code and a tutorial.

Signed-off-by: Ramūnas Mažeikis <ramunasnezinomas@gmail.com>

1 files changed, 20 insertions, 71 deletions

diff --git a/src/common/protocol.c b/src/common/protocol.c
index ed636d2..90dfc92 100644
--- a/src/common/protocol.c
+++ b/src/common/protocol.c
@@ -32,75 +32,6 @@
 #include "net.h"
 #include "utils.h"
 
-#if 0
-int tlv_push(struct tlv_packet *packet, enum tlv_type type, char *data)
-{
-	int ret = 0;
-	size_t size;
-
-	switch (type) {
-	case TEXT:
-		size = strlen(data) + 1;
-		break;
-	case FPI1:
-		size = sizeof(fpi1_t);
-		break;
-	case TIMESTAMP:
-		size = sizeof(time_t);
-		break;
-	case REQUEST:
-		size = sizeof(msg_idx_t);
-		break;
-	case REPLY:
-		size = sizeof(msg_idx_t) + strlen(data + sizeof(msg_idx_t));
-		break;
-	case UUID:
-		size = sizeof(uuid_t);
-		break;
-	default:
-		ret = E_UNKNOWN_TYPE;
-	}
-	ret |= push_tlv_header(packet, type, size);
-	ret |= push_bytes(packet, data, size);
-	return ret;
-}
-
-#endif
-
-void tlv_clear_data(struct tlv_packet *packet)
-{
-	packet->offset = 0;
-	packet->type = 0;
-	memset(packet->data, 0, packet->size);
-}
-
-static int push_bytes(struct tlv_packet *packet, char *data, size_t size)
-{
-	int ret = 0;
-
-	if (packet->offset + size >= packet->size) {
-		ret = E_TLV_OVERFLOW;
-	} else {
-		memcpy(packet->data + packet->offset, data, size);
-		packet->offset += size;
-	}
-}
-
-static int push_tlv_header(struct tlv_packet *packet, enum tlv_type type, size_t size)
-{
-	int ret = 0;
-
-	if (packet->offset + sizeof(type) + sizeof(size) >= packet->size) {
-		ret = E_TLV_OVERFLOW;
-	} else {
-		memcpy(packet->data + packet->size, type, sizeof(type));
-		packet->offset += sizeof(type);
-		memcpy(packet->data + packet->offset, size, sizeof(size));
-		packet->offset += sizeof(size);
-	}
-	return ret;
-}
-
 int tlv_get(struct tlv_parser *parser, struct tlv *ret)
 {
 	int retval = 0;
@@ -141,12 +72,12 @@ void tlv_destroy(struct tlv *t)
 	t->length = 0;
 }
 
-size_t tlv_raw_size(struct tlv *t)
+size_t tlv_raw_size(const struct tlv *t)
 {
 	return sizeof(*t) + t->length;
 }
 
-int tlv_push(struct tlv *t, const char *data, size_t size)
+int tlv_push_data(struct tlv *t, const char *data, size_t size)
 {
 	int ret = 0;
 	size_t final_size = tlv_raw_size(t) + size;
@@ -165,4 +96,22 @@ void tlv_init(struct tlv *t, enum tlv_type type)
 	t->type = type;
 	t->length = 0;
 	t->data = NULL;
+}
+
+int tlv_push_tlv(struct tlv *t, const struct tlv *other)
+{
+	int ret = 0;
+	size_t other_size;
+	size_t final_size;
+
+	other_size = tlv_raw_size(other);
+	final_size = tlv_raw_size(t) + other_size;
+	if (final_size > TLV_SZ_MAX_RAW) {
+		ret = E_TLV_OVERFLOW;
+	} else {
+		tlv_get_raw(other, t->data + t->length);
+		t->length = final_size;
+	}
+
+	return ret;
 }
\ No newline at end of file