* Add support for multiple ip.access nanoBTS at one BSC
* keep track of site_id/bts_id in struct gsm_bts
* dynamically match incoming OML/RSL over TCP connections by BTS Unit ID
* introduce new debug category DINP (separate from DMI for hexdumps)
* remove ia_config() as it is no longer needed
*
* ensure that signalling links / E1 line information is correctly printed
* when bootstrapping RSL or OML, tell us for which BTS it is being doen
* separate bootstrap_bts() out from bootstrap_network()
* statically configure two ip.access BTS, one with unit id's 1800/0/0 and 1801/0/0
diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index b4d53bd..85ec031 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -33,6 +33,7 @@
#include <arpa/inet.h>
#include <openbsc/select.h>
+#include <openbsc/tlv.h>
#include <openbsc/msgb.h>
#include <openbsc/debug.h>
#include <openbsc/gsm_data.h>
@@ -46,35 +47,189 @@
struct ia_e1_handle {
struct bsc_fd listen_fd;
struct bsc_fd rsl_listen_fd;
+ struct gsm_network *gsmnet;
};
+static struct ia_e1_handle *e1h;
+
+
#define TS1_ALLOC_SIZE 300
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 };
+static const u_int8_t id_req[] = { 0, 17, IPAC_PROTO_IPACCESS, IPAC_MSGT_ID_GET,
+ 0x01, IPAC_IDTAG_UNIT,
+ 0x01, IPAC_IDTAG_MACADDR,
+ 0x01, IPAC_IDTAG_LOCATION1,
+ 0x01, IPAC_IDTAG_LOCATION2,
+ 0x01, IPAC_IDTAG_EQUIPVERS,
+ 0x01, IPAC_IDTAG_SWVERSION,
+ 0x01, IPAC_IDTAG_UNITNAME,
+ 0x01, IPAC_IDTAG_SERNR,
+ };
-static int ipaccess_rcvmsg(struct msgb *msg, int fd)
+static const char *idtag_names[] = {
+ [IPAC_IDTAG_SERNR] = "Serial_Number",
+ [IPAC_IDTAG_UNITNAME] = "Unit_Name",
+ [IPAC_IDTAG_LOCATION1] = "Location_1",
+ [IPAC_IDTAG_LOCATION2] = "Location_2",
+ [IPAC_IDTAG_EQUIPVERS] = "Equipment_Version",
+ [IPAC_IDTAG_SWVERSION] = "Software_Version",
+ [IPAC_IDTAG_IPADDR] = "IP_Address",
+ [IPAC_IDTAG_MACADDR] = "MAC_Address",
+ [IPAC_IDTAG_UNIT] = "Unit_ID",
+};
+
+static const char *ipac_idtag_name(int tag)
{
+ if (tag >= ARRAY_SIZE(idtag_names))
+ return "unknown";
+
+ return idtag_names[tag];
+}
+
+static int ipac_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len)
+{
+ u_int8_t t_len;
+ u_int8_t t_tag;
+ u_int8_t *cur = buf;
+
+ while (cur < buf + len) {
+ t_len = *cur++;
+ t_tag = *cur++;
+
+ DEBUGPC(DMI, "%s='%s' ", ipac_idtag_name(t_tag), cur);
+
+ dec->lv[t_tag].len = t_len;
+ dec->lv[t_tag].val = cur;
+
+ cur += t_len;
+ }
+ return 0;
+}
+
+struct gsm_bts *find_bts_by_unitid(struct gsm_network *net,
+ u_int16_t site_id, u_int16_t bts_id)
+{
+ int i;
+
+ for (i = 0; i < net->num_bts; i++) {
+ struct gsm_bts *bts = &net->bts[i];
+
+ if (!is_ipaccess_bts(bts))
+ continue;
+
+ if (bts->ip_access.site_id == site_id &&
+ bts->ip_access.bts_id == bts_id)
+ return bts;
+ }
+
+ return NULL;
+}
+
+static int parse_unitid(const char *str, u_int16_t *site_id, u_int16_t *bts_id,
+ u_int16_t *trx_id)
+{
+ unsigned long ul;
+ char *endptr;
+ const char *nptr;
+
+ nptr = str;
+ ul = strtoul(nptr, &endptr, 10);
+ if (endptr <= nptr)
+ return -EINVAL;
+ if (site_id)
+ *site_id = ul & 0xffff;
+
+ if (*endptr++ != '/')
+ return -EINVAL;
+
+ nptr = endptr;
+ ul = strtoul(nptr, &endptr, 10);
+ if (endptr <= nptr)
+ return -EINVAL;
+ if (bts_id)
+ *bts_id = ul & 0xffff;
+
+ if (*endptr++ != '/')
+ return -EINVAL;
+
+ nptr = endptr;
+ ul = strtoul(nptr, &endptr, 10);
+ if (endptr <= nptr)
+ return -EINVAL;
+ if (trx_id)
+ *trx_id = ul & 0xffff;
+
+ return 0;
+}
+
+static int ipaccess_rcvmsg(struct e1inp_line *line, struct msgb *msg,
+ struct bsc_fd *bfd)
+{
+ struct tlv_parsed tlvp;
u_int8_t msg_type = *(msg->l2h);
+ u_int16_t site_id, bts_id, trx_id;
+ struct gsm_bts *bts;
int ret = 0;
switch (msg_type) {
case IPAC_MSGT_PING:
- ret = write(fd, pong, sizeof(pong));
+ ret = write(bfd->fd, pong, sizeof(pong));
break;
case IPAC_MSGT_PONG:
DEBUGP(DMI, "PONG!\n");
break;
case IPAC_MSGT_ID_RESP:
- DEBUGP(DMI, "ID_RESP\n");
+ DEBUGP(DMI, "ID_RESP ");
+ /* parse tags, search for Unit ID */
+ ipac_idtag_parse(&tlvp, (u_int8_t *)msg->l2h + 2,
+ msgb_l2len(msg)-2);
+ DEBUGP(DMI, "\n");
+
+ if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT))
+ break;
+
+ /* lookup BTS, create sign_link, ... */
+ parse_unitid((char *)TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT),
+ &site_id, &bts_id, &trx_id);
+ bts = find_bts_by_unitid(e1h->gsmnet, site_id, bts_id);
+ if (!bts) {
+ DEBUGP(DINP, "Unable to find BTS configuration for "
+ " %u/%u/%u, disconnecting\n", site_id, bts_id,
+ trx_id);
+ return -EIO;
+ }
+ DEBUGP(DINP, "Identified BTS %u/%u/%u\n", site_id, bts_id, trx_id);
+ if (bfd->priv_nr == 1) {
+ bts->oml_link = e1inp_sign_link_create(&line->ts[1-1],
+ E1INP_SIGN_OML, bts->c0,
+ 0, 0xff);
+ } else if (bfd->priv_nr == 2) {
+ struct e1inp_ts *e1i_ts;
+ struct bsc_fd *newbfd;
+
+ /* FIXME: implement this for non-0 TRX */
+ bfd->data = line = bts->oml_link->ts->line;
+ e1i_ts = &line->ts[2-1];
+ newbfd = &e1i_ts->driver.ipaccess.fd;
+
+ bts->c0->rsl_link =
+ e1inp_sign_link_create(e1i_ts,
+ E1INP_SIGN_RSL, bts->c0,
+ 0, 0);
+ /* get rid of our old temporary bfd */
+ memcpy(newbfd, bfd, sizeof(*newbfd));
+ bsc_unregister_fd(bfd);
+ bsc_register_fd(newbfd);
+ free(bfd);
+ }
break;
case IPAC_MSGT_ID_ACK:
DEBUGP(DMI, "ID_ACK? -> ACK!\n");
- ret = write(fd, id_ack, sizeof(id_ack));
+ ret = write(bfd->fd, id_ack, sizeof(id_ack));
break;
}
-
- msgb_free(msg);
return 0;
}
@@ -121,12 +276,23 @@
return -EIO;
}
msgb_put(msg, ret);
-
- if (hh->proto == IPAC_PROTO_IPACCESS)
- return ipaccess_rcvmsg(msg, bfd->fd);
-
DEBUGP(DMI, "RX %u: %s\n", ts_nr, hexdump(msgb_l2(msg), ret));
+ 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;
+ }
+ msgb_free(msg);
+ return ret;
+ }
+ /* BIG FAT WARNING: bfd might no longer exist here, since ipaccess_rcvmsg()
+ * might have free'd it !!! */
+
link = e1inp_lookup_sign_link(e1i_ts, 0, hh->proto);
if (!link) {
printf("no matching signalling link for hh->proto=0x%02x\n", hh->proto);
@@ -178,7 +344,7 @@
l2_data = msg->data;
- /* prepend the mISDNhead */
+ /* prepend the ip.access header */
hh = (struct ipaccess_head *) msgb_push(msg, sizeof(*hh));
hh->zero = 0;
hh->len = msg->len - sizeof(*hh);
@@ -204,36 +370,27 @@
return ret;
}
-
/* callback from select.c in case one of the fd's can be read/written */
static int ipaccess_fd_cb(struct bsc_fd *bfd, unsigned int what)
{
struct e1inp_line *line = bfd->data;
unsigned int ts_nr = bfd->priv_nr;
unsigned int idx = ts_nr-1;
- struct e1inp_ts *e1i_ts = &line->ts[idx];
+ struct e1inp_ts *e1i_ts;
int rc = 0;
- switch (e1i_ts->type) {
- case E1INP_TS_TYPE_SIGN:
+ /* In case of early RSL we might not yet have a line */
+
+ if (line)
+ e1i_ts = &line->ts[idx];
+
+ if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) {
if (what & BSC_FD_READ)
rc = handle_ts1_read(bfd);
if (what & BSC_FD_WRITE)
rc = handle_ts1_write(bfd);
- break;
-#if 0
- case E1INP_TS_TYPE_TRAU:
- if (what & BSC_FD_READ)
- rc = handle_tsX_read(bfd);
- /* We never include the mISDN B-Channel FD into the
- * writeset, since it doesn't support poll() based
- * write flow control */
- break;
-#endif
- default:
+ } else
fprintf(stderr, "unknown E1 TS type %u\n", e1i_ts->type);
- break;
- }
return rc;
}
@@ -241,12 +398,6 @@
static int ts_want_write(struct e1inp_ts *e1i_ts)
{
- /* We never include the mISDN B-Channel FD into the
- * writeset, since it doesn't support poll() based
- * write flow control */
- if (e1i_ts->type == E1INP_TS_TYPE_TRAU)
- return 0;
-
e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE;
return 0;
@@ -257,89 +408,98 @@
.want_write = ts_want_write,
};
-static int ia_e1_setup(struct e1inp_line *line)
-{
- return 0;
-}
-
+/* callback of the OML listening filedescriptor */
static int listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what)
{
- struct e1inp_line *line = listen_bfd->data;
int ret;
+ int idx = 0;
+ struct e1inp_line *line;
+ struct e1inp_ts *e1i_ts;
+ struct bsc_fd *bfd;
+ struct sockaddr_in sa;
+ socklen_t sa_len = sizeof(sa);
- if (what & BSC_FD_READ) {
- int idx = 0;
- struct e1inp_ts *e1i_ts = &line->ts[idx];
- struct bsc_fd *bfd = &e1i_ts->driver.ipaccess.fd;
- struct sockaddr_in sa;
- socklen_t sa_len = sizeof(sa);
+ if (!(what & BSC_FD_READ))
+ return 0;
- if (bfd->fd) {
- printf("dumping old OML fd\n");
- if (bfd->fd != -1) {
- bsc_unregister_fd(bfd);
- close(bfd->fd);
- }
- }
- bfd->fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
- if (bfd->fd < 0) {
- perror("accept");
- return bfd->fd;
- }
- printf("accept()ed new OML fd\n");
- bfd->data = line;
- bfd->priv_nr = 1;
- bfd->cb = ipaccess_fd_cb;
- bfd->when = BSC_FD_READ;
- ret = bsc_register_fd(bfd);
- if (ret < 0) {
- fprintf(stderr, "could not register FD\n");
- return ret;
- }
+ ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
+ if (ret < 0) {
+ perror("accept");
+ return ret;
}
- return 0;
+ DEBUGP(DINP, "accept()ed new OML link from %s\n", inet_ntoa(sa.sin_addr));
+
+ line = malloc(sizeof(*line));
+ if (!line) {
+ close(ret);
+ return -ENOMEM;
+ }
+ memset(line, 0, sizeof(*line));
+ line->driver = &ipaccess_driver;
+ //line->driver_data = e1h;
+ /* create virrtual E1 timeslots for signalling */
+ e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
+ e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_SIGN);
+
+ e1i_ts = &line->ts[idx];
+
+ bfd = &e1i_ts->driver.ipaccess.fd;
+ bfd->fd = ret;
+ bfd->data = line;
+ bfd->priv_nr = 1;
+ bfd->cb = ipaccess_fd_cb;
+ bfd->when = BSC_FD_READ;
+ ret = bsc_register_fd(bfd);
+ if (ret < 0) {
+ fprintf(stderr, "could not register FD\n");
+ close(bfd->fd);
+ free(line);
+ return ret;
+ }
+
+ /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */
+ ret = write(bfd->fd, id_req, sizeof(id_req));
+
+ return e1inp_line_register(line);
}
static int rsl_listen_fd_cb(struct bsc_fd *listen_bfd, unsigned int what)
{
- struct e1inp_line *line = listen_bfd->data;
+ struct sockaddr_in sa;
+ socklen_t sa_len = sizeof(sa);
+ struct bsc_fd *bfd = malloc(sizeof(*bfd));
int ret;
- if (what & BSC_FD_READ) {
- int idx = 1;
- struct e1inp_ts *e1i_ts = &line->ts[idx];
- struct bsc_fd *bfd = &e1i_ts->driver.ipaccess.fd;
- struct sockaddr_in sa;
- socklen_t sa_len = sizeof(sa);
+ if (!(what & BSC_FD_READ))
+ return 0;
- if (bfd->fd) {
- printf("dumping old RSL fd\n");
- if (bfd->fd != -1) {
- bsc_unregister_fd(bfd);
- close(bfd->fd);
- }
- }
- bfd->fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
- if (bfd->fd < 0) {
- perror("accept");
- return bfd->fd;
- }
- printf("accept()ed new RSL fd\n");
- bfd->data = line;
- bfd->priv_nr = 2;
- bfd->cb = ipaccess_fd_cb;
- bfd->when = BSC_FD_READ;
- ret = bsc_register_fd(bfd);
- if (ret < 0) {
- fprintf(stderr, "could not register FD\n");
- return ret;
- }
+ /* Some BTS has connected to us, but we don't know yet which line
+ * (as created by the OML link) to associate it with. Thus, we
+ * aloocate a temporary bfd until we have received ID from BTS */
+
+ bfd->fd = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len);
+ if (bfd->fd < 0) {
+ perror("accept");
+ return bfd->fd;
}
+ DEBUGP(DINP, "accept()ed new RSL link from %s\n", inet_ntoa(sa.sin_addr));
+ bfd->priv_nr = 2;
+ bfd->cb = ipaccess_fd_cb;
+ bfd->when = BSC_FD_READ;
+ ret = bsc_register_fd(bfd);
+ if (ret < 0) {
+ fprintf(stderr, "could not register FD\n");
+ close(bfd->fd);
+ free(bfd);
+ return ret;
+ }
+ /* Request ID. FIXME: request LOCATION, HW/SW VErsion, Unit Name, Serno */
+ ret = write(bfd->fd, id_req, sizeof(id_req));
+
return 0;
}
static int make_sock(struct bsc_fd *bfd, u_int16_t port,
- struct e1inp_line *line,
int (*cb)(struct bsc_fd *fd, unsigned int what))
{
struct sockaddr_in addr;
@@ -348,7 +508,7 @@
bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
bfd->cb = cb;
bfd->when = BSC_FD_READ;
- bfd->data = line;
+ //bfd->data = line;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
@@ -411,9 +571,8 @@
return e1inp_line_register(line);
}
-int ipaccess_setup(struct e1inp_line *line)
+int ipaccess_setup(struct gsm_network *gsmnet)
{
- struct ia_e1_handle *e1h;
int ret;
/* register the driver with the core */
@@ -422,23 +581,15 @@
if (ret)
return ret;
- /* create the actual line instance */
- /* FIXME: do this independent of driver registration */
e1h = malloc(sizeof(*e1h));
memset(e1h, 0, sizeof(*e1h));
-
- line->driver = &ipaccess_driver;
- line->driver_data = e1h;
+ e1h->gsmnet = gsmnet;
/* Listen for OML connections */
- ret = make_sock(&e1h->listen_fd, 3002, line, listen_fd_cb);
+ ret = make_sock(&e1h->listen_fd, 3002, listen_fd_cb);
/* Listen for RSL connections */
- ret = make_sock(&e1h->rsl_listen_fd, 3003, line, rsl_listen_fd_cb);
+ ret = make_sock(&e1h->rsl_listen_fd, 3003, rsl_listen_fd_cb);
- ret = ia_e1_setup(line);
- if (ret)
- return ret;
-
- return e1inp_line_register(line);
+ return ret;
}