diff --git a/include/patty/ax25/sock.h b/include/patty/ax25/sock.h
index 3c04393..a2dde53 100644
--- a/include/patty/ax25/sock.h
+++ b/include/patty/ax25/sock.h
@@ -121,6 +121,8 @@ ssize_t patty_ax25_sock_send_sabme(patty_ax25_sock *sock, int pf);
 
 ssize_t patty_ax25_sock_send_disc(patty_ax25_sock *sock, int pf);
 
+ssize_t patty_ax25_sock_send_xid(patty_ax25_sock *sock);
+
 ssize_t patty_ax25_sock_write(patty_ax25_sock *sock,
                               void *buf,
                               size_t len);
diff --git a/src/sock.c b/src/sock.c
index e2178c5..1abbfaf 100644
--- a/src/sock.c
+++ b/src/sock.c
@@ -377,6 +377,63 @@ ssize_t patty_ax25_sock_send_disc(patty_ax25_sock *sock, int pf) {
                                 0);
 }
 
+ssize_t patty_ax25_sock_send_xid(patty_ax25_sock *sock) {
+    patty_ax25_params params;
+    ssize_t encoded;
+
+    if (sock->remote.callsign[0] == '\0') {
+        goto error_nopeer;
+    }
+
+    params.flags = PATTY_AX25_PARAM_CLASSES
+                 | PATTY_AX25_PARAM_HDLC
+                 | PATTY_AX25_PARAM_INFO_TX
+                 | PATTY_AX25_PARAM_INFO_RX
+                 | PATTY_AX25_PARAM_WINDOW_TX
+                 | PATTY_AX25_PARAM_WINDOW_RX
+                 | PATTY_AX25_PARAM_ACK
+                 | PATTY_AX25_PARAM_RETRY;
+
+    /*
+     * TODO: This value needs to come from the interface this socket is bound
+     * to
+     */
+    params.classes = PATTY_AX25_PARAM_CLASSES_ABM
+                   | PATTY_AX25_PARAM_CLASSES_HALF_DUPLEX;
+
+    /*
+     * TODO: These flags should be part of each sock object
+     */
+    params.hdlc = PATTY_AX25_PARAM_HDLC_REJ
+                | PATTY_AX25_PARAM_HDLC_SREJ
+                | PATTY_AX25_PARAM_HDLC_XADDR
+                | PATTY_AX25_PARAM_HDLC_MODULO_128
+                | PATTY_AX25_PARAM_HDLC_SYNC_TX;
+
+    params.info_tx   = sock->n_maxlen_tx;
+    params.info_rx   = sock->n_maxlen_rx;
+    params.window_tx = sock->n_window_tx;
+    params.window_rx = sock->n_window_rx;
+    params.ack       = sock->n_ack;
+    params.retry     = sock->n_retry;
+
+    if ((encoded = patty_ax25_frame_encode_xid(&params,
+                                               sock->buf,
+                                               sock->n_maxlen_tx)) < 0) {
+        goto error_frame_encode_xid;
+    }
+
+    return patty_ax25_sock_send(sock,
+                                PATTY_AX25_FRAME_COMMAND,
+                                control_u(PATTY_AX25_FRAME_XID, 0),
+                                sock->buf,
+                                encoded);
+
+error_nopeer:
+error_frame_encode_xid:
+    return -1;
+}
+
 ssize_t patty_ax25_sock_write(patty_ax25_sock *sock,
                               void *buf,
                               size_t len) {