Support for multiple RSL connections with ABIS/ipaccess (BTS side)
In order to support multiple TRX, multiple RSL connections can be
establised. e1inp_ipa_bts_rsl_connect() requires an additional parameter
to set the TRX number.
The ts[] array (member of struct e1inp_line) refers to OML and RSL.
ts[0] refers to OML link, ts[1] to RSL link of first TRX, ts[2] to
RSL link of second TRX (if exists) and so on.
The code was successfully tested with osmobts-trx and UmTRX with two
transceivers.
The user of e1inp_ipa_bts_rsl_connect() (which is osmo-bts) can use
the new function like this (backwards compatibility function provided):
src/common/oml.c
- rc = e1inp_ipa_bts_rsl_connect(oml_link->ts->line, inet_ntoa(in), port);
+ rc = e1inp_ipa_bts_rsl_connect_n(oml_link->ts->line, inet_ntoa(in), port,
+ trx->nr);
diff --git a/include/osmocom/abis/e1_input.h b/include/osmocom/abis/e1_input.h
index fe5d624..e5d2991 100644
--- a/include/osmocom/abis/e1_input.h
+++ b/include/osmocom/abis/e1_input.h
@@ -270,6 +270,10 @@
int e1inp_ipa_bts_rsl_connect(struct e1inp_line *line,
const char *rem_addr, uint16_t rem_port);
+int e1inp_ipa_bts_rsl_connect_n(struct e1inp_line *line,
+ const char *rem_addr, uint16_t rem_port,
+ uint8_t trx_id);
+
void e1inp_sign_link_destroy(struct e1inp_sign_link *link);
int e1inp_line_update(struct e1inp_line *line);
diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index b8932a2..145e471 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -564,7 +564,7 @@
#define IPA_STRING_MAX 64
static struct msgb *
-ipa_bts_id_resp(struct ipaccess_unit *dev, uint8_t *data, int len)
+ipa_bts_id_resp(struct ipaccess_unit *dev, uint8_t *data, int len, int trx_nr)
{
struct msgb *nmsg;
char str[IPA_STRING_MAX];
@@ -585,7 +585,7 @@
switch (data[1]) {
case IPAC_IDTAG_UNIT:
snprintf(str, sizeof(str), "%u/%u/%u",
- dev->site_id, dev->bts_id, dev->trx_id);
+ dev->site_id, dev->bts_id, trx_nr);
break;
case IPAC_IDTAG_MACADDR:
snprintf(str, sizeof(str),
@@ -685,9 +685,13 @@
if (msg_type == IPAC_MSGT_ID_GET) {
uint8_t *data = msgb_l2(msg);
int len = msgb_l2len(msg);
+ int trx_nr = 0;
+
+ if (link->ofd->priv_nr >= E1INP_SIGN_RSL)
+ trx_nr = link->ofd->priv_nr - E1INP_SIGN_RSL;
LOGP(DLINP, LOGL_NOTICE, "received ID get\n");
- rmsg = ipa_bts_id_resp(dev, data + 1, len - 1);
+ rmsg = ipa_bts_id_resp(dev, data + 1, len - 1, trx_nr);
ret = ipa_send(link->ofd->fd, rmsg->data, rmsg->len);
if (ret != rmsg->len) {
LOGP(DLINP, LOGL_ERROR, "cannot send ID_RESP "
@@ -766,7 +770,7 @@
} else if (link->port == IPA_TCP_PORT_OML)
e1i_ts = &link->line->ts[0];
else if (link->port == IPA_TCP_PORT_RSL)
- e1i_ts = &link->line->ts[1];
+ e1i_ts = &link->line->ts[link->ofd->priv_nr-1];
OSMO_ASSERT(e1i_ts != NULL);
@@ -892,14 +896,35 @@
return ret;
}
+
+/* backwards compatibility */
int e1inp_ipa_bts_rsl_connect(struct e1inp_line *line,
const char *rem_addr, uint16_t rem_port)
{
+ return e1inp_ipa_bts_rsl_connect_n(line, rem_addr, rem_port, 0);
+}
+
+int e1inp_ipa_bts_rsl_connect_n(struct e1inp_line *line,
+ const char *rem_addr, uint16_t rem_port,
+ uint8_t trx_nr)
+{
struct ipa_client_conn *rsl_link;
+ if (E1INP_SIGN_RSL+trx_nr-1 >= NUM_E1_TS) {
+ LOGP(DLINP, LOGL_ERROR, "cannot create RSL BTS link: "
+ "trx_nr (%d) out of range\n", trx_nr);
+ return -EINVAL;
+ }
+ if (line->ts[E1INP_SIGN_RSL+trx_nr-1].type != E1INP_TS_TYPE_SIGN) {
+ LOGP(DLINP, LOGL_ERROR, "cannot create RSL BTS link: "
+ "trx_nr (%d) does not refer to a signalling link\n",
+ trx_nr);
+ return -EINVAL;
+ }
+
rsl_link = ipa_client_conn_create(tall_ipa_ctx,
- &line->ts[E1INP_SIGN_RSL-1],
- E1INP_SIGN_RSL,
+ &line->ts[E1INP_SIGN_RSL+trx_nr-1],
+ E1INP_SIGN_RSL+trx_nr,
rem_addr, rem_port,
ipaccess_bts_updown_cb,
ipaccess_bts_read_cb,
diff --git a/tests/e1inp_ipa_bts_test.c b/tests/e1inp_ipa_bts_test.c
index 18f1709..5798d00 100644
--- a/tests/e1inp_ipa_bts_test.c
+++ b/tests/e1inp_ipa_bts_test.c
@@ -71,7 +71,7 @@
/* Now we can send OML messages to the BSC. */
bts_state = BTS_TEST_OML_SIGN_LINK_UP;
}
- e1inp_ipa_bts_rsl_connect(line, "127.0.0.1", IPA_TCP_PORT_RSL);
+ e1inp_ipa_bts_rsl_connect(line, "127.0.0.1", IPA_TCP_PORT_RSL, 0);
break;
case E1INP_SIGN_RSL:
LOGP(DBTSTEST, LOGL_NOTICE, "RSL link up request received.\n");