1 files changed, 62 insertions, 3 deletions
diff --git a/include/packet.c b/include/packet.c
index 5f551de..a523285 100644
--- a/include/packet.c
+++ b/include/packet.c
@@ -1,7 +1,66 @@
 #include "packet.h"
 
-unsigned int system_packet_checksum(struct kv_system_packet *packet) {
-	return 	(packet->user_id << 8) ^ 
-		(packet->operation_id | (177013 << 10));
+i64 const commd_size_lookup[64] = {[CMD_CREATE]	  = sizeof(struct commd_create),
+				       [CMD_DELETE]	  = sizeof(struct commd_delete),
+				       [CMD_JOIN]	  = sizeof(struct commd_join),
+				       [CMD_LEAVE]	  = sizeof(struct commd_leave),
+				       [CMD_REGISTER]	  = sizeof(struct commd_register),
+				       [CMD_UNREGISTER]	  = sizeof(struct commd_unregister),
+				       [CMD_GET_PORT]	  = sizeof(struct commd_get_port),
+				       [CMD_GET_CHANNELS] = 0, // You can not get a sizeof(void)
+				       0};
+
+u32 system_packet_checksum(struct kv_system_packet *packet)
+{
+	return ((packet->user_id << 8) ^ (ntoh64(packet->operation_id) | (177013 << 10)) ^ packet->ackid) &
+	       packet->magic_bytes;
+}
+u8 is_system_packet(struct kv_packet *p)
+{
+	struct kv_system_packet *sysp = (struct kv_system_packet *)p;
+	if (sysp->magic_bytes == SYS_PACKET_MAGIC_BYTES && (signed int)ntohl(sysp->operation_id) < 0) return 1;
+	return 0;
+}
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+u64 hton64(u64 a)
+{
+	#if __SIZEOF_SIZE_T__ == 8
+	return ((u64)htonl((u32)(a & 0xFFFFFFFF)) << 32) | (u64)htonl((u32)(a >> 32));
+	#else
+	return htonl((u32)a);
+	#endif
+}
+u64 ntoh64(u64 a)
+{
+	#if __SIZEOF_SIZE_T__ == 8
+	return ((u64)ntohl((u32)(a & 0xFFFFFFFF)) << 32) | (u64)ntohl((u32)(a >> 32));
+	#else
+	return ntohl((u32)a);
+	#endif
 }
+#else
+u64 htonzu(u64 a) { return a; }
+u64 ntohzu(u64 a) { return a; }
+#endif
 
+const char *kv_strerror(enum commd_error e)
+{
+	switch (e) {
+	case ERR_SUCCESS:
+		return "Success";
+	case ERR_SERV:
+		return "Internal server error";
+	case ERR_ACCESS:
+		return "No access";
+	case ERR_INVAL:
+		return "Invalid/insufficient parameters";
+	case ERR_PARAM:
+		return "Incorrect parameters";
+	case ERR_NOIMPL:
+		return "Not implemented";
+	case ERR_DO_IT_YOURSELF:
+		return "You should not have recieved this error. This is either server or network fault";
+	}
+	return "Unknown error";
+}