diff --git a/include/osmocom/abis/ipa.h b/include/osmocom/abis/ipa.h
index f088ec0..d455069 100644
--- a/include/osmocom/abis/ipa.h
+++ b/include/osmocom/abis/ipa.h
@@ -42,19 +42,22 @@
 
 struct ipa_client_link {
 	struct e1inp_line		*line;
-	struct osmo_fd			ofd;
+	struct osmo_fd			*ofd;
 	struct llist_head		tx_queue;
 	struct osmo_timer_list		timer;
 	enum ipa_client_link_state	state;
 	const char			*addr;
 	uint16_t			port;
-	int (*cb)(struct ipa_client_link *link, struct msgb *msg);
+	int (*read_cb)(struct ipa_client_link *link, struct msgb *msg);
+	int (*write_cb)(struct ipa_client_link *link);
 	void				*data;
 };
 
-struct ipa_client_link *ipa_client_link_create(void *ctx, struct e1inp_line *line, const char *addr, uint16_t port, int (*cb)(struct ipa_client_link *link, struct msgb *msgb), void *data);
+struct ipa_client_link *ipa_client_link_create(void *ctx, struct e1inp_ts *ts, const char *driver_name, int priv_nr, const char *addr, uint16_t port, int (*read_cb)(struct ipa_client_link *link, struct msgb *msgb), int (*write_cb)(struct ipa_client_link *link), void *data);
 void ipa_client_link_destroy(struct ipa_client_link *link);
 
+int ipa_client_write_default_cb(struct ipa_client_link *link);
+
 int ipa_client_link_open(struct ipa_client_link *link);
 void ipa_client_link_close(struct ipa_client_link *link);