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Diffstat (limited to 'openbsc/src/input/ipaccess.c')
-rw-r--r--openbsc/src/input/ipaccess.c209
1 files changed, 131 insertions, 78 deletions
diff --git a/openbsc/src/input/ipaccess.c b/openbsc/src/input/ipaccess.c
index 323540f48..721cadd23 100644
--- a/openbsc/src/input/ipaccess.c
+++ b/openbsc/src/input/ipaccess.c
@@ -1,6 +1,8 @@
/* OpenBSC Abis input driver for ip.access */
/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by Holger Hans Peter Freyther
+ * (C) 2010 by On-Waves
*
* All Rights Reserved
*
@@ -57,7 +59,7 @@ struct ia_e1_handle {
static struct ia_e1_handle *e1h;
-#define TS1_ALLOC_SIZE 300
+#define TS1_ALLOC_SIZE 900
static const u_int8_t pong[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_PONG };
static const u_int8_t id_ack[] = { 0, 1, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_ACK };
@@ -234,6 +236,8 @@ static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg,
}
DEBUGP(DINP, "Identified BTS %u/%u/%u\n", site_id, bts_id, trx_id);
if (bfd->priv_nr == PRIV_OML) {
+ /* drop any old oml connection */
+ ipaccess_drop_oml(bts);
bts->oml_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1],
E1INP_SIGN_OML, bts->c0,
bts->oml_tei, 0);
@@ -241,7 +245,18 @@ static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg,
struct e1inp_ts *e1i_ts;
struct bsc_fd *newbfd;
struct gsm_bts_trx *trx = gsm_bts_trx_num(bts, trx_id);
-
+
+ /* drop any old rsl connection */
+ ipaccess_drop_rsl(trx);
+
+ if (!bts->oml_link) {
+ bsc_unregister_fd(bfd);
+ close(bfd->fd);
+ bfd->fd = -1;
+ talloc_free(bfd);
+ return 0;
+ }
+
bfd->data = line = bts->oml_link->ts->line;
e1i_ts = &line->ts[PRIV_RSL + trx_id - 1];
newbfd = &e1i_ts->driver.ipaccess.fd;
@@ -251,19 +266,13 @@ static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg,
E1INP_SIGN_RSL, trx,
trx->rsl_tei, 0);
- if (newbfd->fd >= 0) {
- LOGP(DINP, LOGL_ERROR, "BTS is still registered. Closing old connection.\n");
- bsc_unregister_fd(newbfd);
- close(newbfd->fd);
- newbfd->fd = -1;
- }
-
/* get rid of our old temporary bfd */
memcpy(newbfd, bfd, sizeof(*newbfd));
newbfd->priv_nr = PRIV_RSL + trx_id;
bsc_unregister_fd(bfd);
- bsc_register_fd(newbfd);
+ bfd->fd = -1;
talloc_free(bfd);
+ bsc_register_fd(newbfd);
}
break;
}
@@ -328,6 +337,103 @@ struct msgb *ipaccess_read_msg(struct bsc_fd *bfd, int *error)
return msg;
}
+int ipaccess_drop_oml(struct gsm_bts *bts)
+{
+ struct gsm_bts_trx *trx;
+ struct e1inp_ts *ts;
+ struct e1inp_line *line;
+ struct bsc_fd *bfd;
+
+ if (!bts || !bts->oml_link)
+ return -1;
+
+ /* send OML down */
+ ts = bts->oml_link->ts;
+ line = ts->line;
+ e1inp_event(ts, EVT_E1_TEI_DN, bts->oml_link->tei, bts->oml_link->sapi);
+
+ bfd = &ts->driver.ipaccess.fd;
+ bsc_unregister_fd(bfd);
+ close(bfd->fd);
+ bfd->fd = -1;
+
+ /* clean up OML and RSL */
+ e1inp_sign_link_destroy(bts->oml_link);
+ bts->oml_link = NULL;
+ bts->ip_access.flags = 0;
+
+ /* drop all RSL connections too */
+ llist_for_each_entry(trx, &bts->trx_list, list)
+ ipaccess_drop_rsl(trx);
+
+ /* kill the E1 line now... as we have no one left to use it */
+ talloc_free(line);
+
+ return -1;
+}
+
+static int ipaccess_drop(struct e1inp_ts *ts, struct bsc_fd *bfd)
+{
+ struct e1inp_sign_link *link;
+ int bts_nr;
+
+ if (!ts) {
+ /*
+ * If we don't have a TS this means that this is a RSL
+ * connection but we are not past the authentication
+ * handling yet. So we can safely delete this bfd and
+ * wait for a reconnect.
+ */
+ bsc_unregister_fd(bfd);
+ close(bfd->fd);
+ bfd->fd = -1;
+ talloc_free(bfd);
+ return -1;
+ }
+
+ /* attempt to find a signalling link */
+ if (ts->type == E1INP_TS_TYPE_SIGN) {
+ llist_for_each_entry(link, &ts->sign.sign_links, list) {
+ bts_nr = link->trx->bts->bts_nr;
+ /* we have issues just reconnecting RLS so we drop OML */
+ ipaccess_drop_oml(link->trx->bts);
+ return bts_nr;
+ }
+ }
+
+ /* error case */
+ LOGP(DINP, LOGL_ERROR, "Failed to find a signalling link for ts: %p\n", ts);
+ bsc_unregister_fd(bfd);
+ close(bfd->fd);
+ bfd->fd = -1;
+ return -1;
+}
+
+int ipaccess_drop_rsl(struct gsm_bts_trx *trx)
+{
+ struct bsc_fd *bfd;
+ struct e1inp_ts *ts;
+
+ if (!trx || !trx->rsl_link)
+ return -1;
+
+ /* send RSL down */
+ ts = trx->rsl_link->ts;
+ e1inp_event(ts, EVT_E1_TEI_DN, trx->rsl_link->tei, trx->rsl_link->sapi);
+
+ /* close the socket */
+ bfd = &ts->driver.ipaccess.fd;
+ bsc_unregister_fd(bfd);
+ close(bfd->fd);
+ bfd->fd = -1;
+
+ /* destroy */
+ e1inp_sign_link_destroy(trx->rsl_link);
+ trx->rsl_link = NULL;
+
+ return -1;
+}
+
static int handle_ts1_read(struct bsc_fd *bfd)
{
struct e1inp_line *line = bfd->data;
@@ -341,18 +447,12 @@ static int handle_ts1_read(struct bsc_fd *bfd)
msg = ipaccess_read_msg(bfd, &error);
if (!msg) {
if (error == 0) {
- link = e1inp_lookup_sign_link(e1i_ts, IPAC_PROTO_OML, 0);
- if (link) {
- link->trx->bts->ip_access.flags = 0;
+ int ret = ipaccess_drop(e1i_ts, bfd);
+ if (ret >= 0)
LOGP(DINP, LOGL_NOTICE, "BTS %u disappeared, dead socket\n",
- link->trx->bts->nr);
- } else
+ ret);
+ else
LOGP(DINP, LOGL_NOTICE, "unknown BTS disappeared, dead socket\n");
- e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_RSL);
- e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_OML);
- bsc_unregister_fd(bfd);
- close(bfd->fd);
- bfd->fd = -1;
}
return error;
}
@@ -362,13 +462,8 @@ static int handle_ts1_read(struct bsc_fd *bfd)
hh = (struct ipaccess_head *) msg->data;
if (hh->proto == IPAC_PROTO_IPACCESS) {
ret = ipaccess_rcvmsg(line, msg, bfd);
- if (ret < 0) {
- e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_RSL);
- e1inp_event(e1i_ts, EVT_E1_TEI_DN, 0, IPAC_PROTO_OML);
- bsc_unregister_fd(bfd);
- close(bfd->fd);
- bfd->fd = -1;
- }
+ if (ret < 0)
+ ipaccess_drop(e1i_ts, bfd);
msgb_free(msg);
return ret;
}
@@ -475,7 +570,9 @@ static int handle_ts1_write(struct bsc_fd *bfd)
/* set tx delay timer for next event */
e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
e1i_ts->sign.tx_timer.data = e1i_ts;
- bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, 100);
+
+ /* Reducing this might break the nanoBTS 900 init. */
+ bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, 100000);
return ret;
}
@@ -505,7 +602,6 @@ static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what)
return rc;
}
-
struct e1inp_driver ipaccess_driver = {
.name = "ip.access",
.want_write = ts_want_write,
@@ -611,53 +707,6 @@ static int rsl_listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what)
return 0;
}
-static int make_sock(struct bsc_fd *bfd, u_int16_t port,
- int (*cb)(struct bsc_fd *fd, unsigned int what))
-{
- struct sockaddr_in addr;
- int ret, on = 1;
-
- bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
- bfd->cb = cb;
- bfd->when = BSC_FD_READ;
- //bfd->data = line;
-
- if (bfd->fd < 0) {
- LOGP(DINP, LOGL_ERROR, "could not create TCP socket.\n");
- return -EIO;
- }
-
- memset(&addr, 0, sizeof(addr));
- addr.sin_family = AF_INET;
- addr.sin_port = htons(port);
- addr.sin_addr.s_addr = INADDR_ANY;
-
- setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
-
- ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr));
- if (ret < 0) {
- LOGP(DINP, LOGL_ERROR, "could not bind l2 socket %s\n",
- strerror(errno));
- close(bfd->fd);
- return -EIO;
- }
-
- ret = listen(bfd->fd, 1);
- if (ret < 0) {
- perror("listen");
- close(bfd->fd);
- return ret;
- }
-
- ret = bsc_register_fd(bfd);
- if (ret < 0) {
- perror("register_listen_fd");
- close(bfd->fd);
- return ret;
- }
- return 0;
-}
-
/* Actively connect to a BTS. Currently used by ipaccess-config.c */
int ipaccess_connect(struct e1inp_line *line, struct sockaddr_in *sa)
{
@@ -714,12 +763,16 @@ int ipaccess_setup(struct gsm_network *gsmnet)
e1h->gsmnet = gsmnet;
/* Listen for OML connections */
- ret = make_sock(&e1h->listen_fd, IPA_TCP_PORT_OML, listen_fd_cb);
+ ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, IPA_TCP_PORT_OML,
+ listen_fd_cb);
if (ret < 0)
return ret;
/* Listen for RSL connections */
- ret = make_sock(&e1h->rsl_listen_fd, IPA_TCP_PORT_RSL, rsl_listen_fd_cb);
+ ret = make_sock(&e1h->rsl_listen_fd, IPPROTO_TCP,
+ IPA_TCP_PORT_RSL, rsl_listen_fd_cb);
+ if (ret < 0)
+ return ret;
return ret;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-22 06:46:07 +0000