+/**
+ * A wrapper around connect(2).
+ *
+ * \param fd The file descriptor.
+ * \param addr The address to connect.
+ * \param len The size of \a addr.
+ *
+ * This should not be called directly. Always use the PARA_CONNECT macro.
+ *
+ * \return \p -E_CONNECT on errors, 1 on success.
+ *
+ * \sa connect(2), PARA_CONNECT.
+ */
+static inline int _para_connect(int fd, void *addr, socklen_t len)
+{
+ if (connect(fd, (struct sockaddr *)addr, len) == -1)
+ return -E_CONNECT;
+ return 1;
+}
+
+/** A macro for connect() which does not need a \a len parameter. */
+#define PARA_CONNECT(fd, addr) _para_connect(fd, addr, sizeof(*(addr)))