implemented Login and Register requests

include/tcp-chat/client.h

@@ -26,3 +26,9 @@ Result(void) Client_getServerName(Client* self, str* out_name);
 /// @param self connected client
 /// @param out_name owned by Client, fetched from server during Client_connect
 Result(void) Client_getServerDescription(Client* self, str* out_desc);
+
+/// Create new account on connected server
+Result(void) Client_register(Client* self, u64* out_user_id);
+
+/// Authorize on connected server
+Result(void) Client_login(Client* self, u64* out_user_id, u64* out_landing_channel_id);

include/tcp-chat/common_constants.h

@@ -6,10 +6,13 @@
 #define PASSWORD_SIZE_MIN 8
 #define PASSWORD_SIZE_MAX 31
 #define PASSWORD_HASH_SIZE 32
+#define HOSTADDR_SIZE_MIN 4
+#define HOSTADDR_SIZE_MAX 255
+#define PRIVATE_KEY_BASE64_SIZE_MAX 1724
+#define PUBLIC_KEY_BASE64_SIZE_MAX 699
+#define SERVER_NAME_SIZE_MIN 1
+#define SERVER_NAME_SIZE_MAX 127
+#define SERVER_DESC_SIZE_MAX 1023
 #define CHANNEL_NAME_SIZE_MIN 1
 #define CHANNEL_NAME_SIZE_MAX 127
 #define CHANNEL_DESC_SIZE_MAX 1023
-#define PRIVATE_KEY_BASE64_SIZE_MAX 1724
-#define PUBLIC_KEY_BASE64_SIZE_MAX 699
-#define HOSTADDR_SIZE_MIN 4
-#define HOSTADDR_SIZE_MAX 255