e1input: rework generic (virtual and real) E1 line operations
struct e1inp_line_ops {
int (*sign_link_up)(struct msgb *msg, struct e1inp_line *line);
int (*sign_link)(struct msgb *msg, struct e1inp_sign_link *link);
int (*error)(struct msgb *msg, int error);
};
The description of the operations is the following:
* sign_link_up is invoked if the signalling link becomes up. In A-bis
over IP, we have to wait until the other peer identifies itself as
a BTS/BSC device, then this function is invoked. This function is not
used by ISDN drivers, the signalling link can be set up just after
the line is created.
* sign_link is called if we receive OML/RSL message. This function
is used both by ISDN and A-bis over IP drivers.
* error is called if we receive a malformed message. It is used both
by ISDN and A-bis over IP drivers.
diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index ef773ba..92819ac 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -170,18 +170,65 @@
return msg;
}
+/* base handling of the ip.access protocol */
+int ipaccess_rcvmsg_base(struct msgb *msg,
+ struct osmo_fd *bfd)
+{
+ uint8_t msg_type = *(msg->l2h);
+ int ret = 0;
+
+ switch (msg_type) {
+ case IPAC_MSGT_PING:
+ ret = ipaccess_send_pong(bfd->fd);
+ break;
+ case IPAC_MSGT_PONG:
+ DEBUGP(DMI, "PONG!\n");
+ break;
+ case IPAC_MSGT_ID_ACK:
+ DEBUGP(DMI, "ID_ACK? -> ACK!\n");
+ ret = ipaccess_send_id_ack(bfd->fd);
+ break;
+ }
+ return 0;
+}
+
+static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg,
+ struct osmo_fd *bfd)
+{
+ uint8_t msg_type = *(msg->l2h);
+
+ /* handle base messages */
+ ipaccess_rcvmsg_base(msg, bfd);
+
+ switch (msg_type) {
+ case IPAC_MSGT_ID_RESP:
+ DEBUGP(DMI, "ID_RESP\n");
+ if (!line->ops.sign_link_up) {
+ LOGP(DINP, LOGL_ERROR, "Fix your application, "
+ "no action set if the signalling link "
+ "becomes ready\n");
+ return -EINVAL;
+ }
+ line->ops.sign_link_up(msg, line);
+ break;
+ }
+ return 0;
+}
+
static int handle_ts1_read(struct osmo_fd *bfd)
{
struct e1inp_line *line = bfd->data;
unsigned int ts_nr = bfd->priv_nr;
struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1];
+ struct e1inp_sign_link *link;
+ struct ipaccess_head *hh;
struct msgb *msg;
int ret = 0, error;
msg = ipaccess_read_msg(bfd, &error);
if (!msg) {
- if (e1i_ts->line->rx_err)
- e1i_ts->line->rx_err(error);
+ if (e1i_ts->line->ops.error)
+ e1i_ts->line->ops.error(NULL, error);
if (error == 0) {
osmo_fd_unregister(bfd);
close(bfd->fd);
@@ -191,10 +238,32 @@
}
DEBUGP(DMI, "RX %u: %s\n", ts_nr, osmo_hexdump(msgb_l2(msg), msgb_l2len(msg)));
- /* XXX better use e1inp_ts_rx. */
+ hh = (struct ipaccess_head *) msg->data;
+ if (hh->proto == IPAC_PROTO_IPACCESS) {
+ ipaccess_rcvmsg(line, msg, bfd);
+ msgb_free(msg);
+ return ret;
+ }
+ /* BIG FAT WARNING: bfd might no longer exist here, since ipaccess_rcvmsg()
+ * might have free'd it !!! */
- if (e1i_ts->line->rx)
- e1i_ts->line->rx(msg, e1i_ts);
+ link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0);
+ if (!link) {
+ LOGP(DINP, LOGL_ERROR, "no matching signalling link for "
+ "hh->proto=0x%02x\n", hh->proto);
+ msgb_free(msg);
+ return -EIO;
+ }
+ msg->dst = link;
+
+ /* XXX better use e1inp_ts_rx? */
+ if (!e1i_ts->line->ops.sign_link) {
+ LOGP(DINP, LOGL_ERROR, "Fix your application, "
+ "no action set for signalling messages.\n");
+ return -ENOENT;
+ }
+ e1i_ts->line->ops.sign_link(msg, link);
+
return ret;
}