Merge branch 'zecke/features/osmux-reliability'
Not verified that the audio handling is working. I saw a circuit
set-up of the call though.
diff --git a/openbsc/include/openbsc/mgcp_internal.h b/openbsc/include/openbsc/mgcp_internal.h
index 1f83659..db22bcf 100644
--- a/openbsc/include/openbsc/mgcp_internal.h
+++ b/openbsc/include/openbsc/mgcp_internal.h
@@ -192,6 +192,8 @@
/* Osmux state: disabled, activating, active */
enum osmux_state state;
/* Allocated Osmux circuit ID for this endpoint */
+ int allocated_cid;
+ /* Used Osmux circuit ID for this endpoint */
uint8_t cid;
/* handle to batch messages */
struct osmux_in_handle *in;
diff --git a/openbsc/include/openbsc/osmux.h b/openbsc/include/openbsc/osmux.h
index 8c01fd0..82b8fa3 100644
--- a/openbsc/include/openbsc/osmux.h
+++ b/openbsc/include/openbsc/osmux.h
@@ -14,6 +14,8 @@
int osmux_enable_endpoint(struct mgcp_endpoint *endp, int role,
struct in_addr *addr, uint16_t port);
void osmux_disable_endpoint(struct mgcp_endpoint *endp);
+void osmux_allocate_cid(struct mgcp_endpoint *endp);
+void osmux_release_cid(struct mgcp_endpoint *endp);
int osmux_xfrm_to_rtp(struct mgcp_endpoint *endp, int type, char *buf, int rc);
int osmux_xfrm_to_osmux(int type, char *buf, int rc, struct mgcp_endpoint *endp);
@@ -22,6 +24,7 @@
int osmux_get_cid(void);
void osmux_put_cid(uint8_t osmux_cid);
+int osmux_used_cid(void);
enum osmux_state {
OSMUX_STATE_DISABLED = 0,
@@ -29,4 +32,10 @@
OSMUX_STATE_ENABLED,
};
+enum osmux_usage {
+ OSMUX_USAGE_OFF = 0,
+ OSMUX_USAGE_ON = 1,
+ OSMUX_USAGE_ONLY = 2,
+};
+
#endif
diff --git a/openbsc/src/libmgcp/mgcp_osmux.c b/openbsc/src/libmgcp/mgcp_osmux.c
index 90b7368..2d39b2c 100644
--- a/openbsc/src/libmgcp/mgcp_osmux.c
+++ b/openbsc/src/libmgcp/mgcp_osmux.c
@@ -492,6 +492,19 @@
osmux_handle_put(endp->osmux.in);
}
+void osmux_release_cid(struct mgcp_endpoint *endp)
+{
+ if (endp->osmux.allocated_cid >= 0)
+ osmux_put_cid(endp->osmux.allocated_cid);
+ endp->osmux.allocated_cid = -1;
+}
+
+void osmux_allocate_cid(struct mgcp_endpoint *endp)
+{
+ osmux_release_cid(endp);
+ endp->osmux.allocated_cid = osmux_get_cid();
+}
+
/* We don't need to send the dummy load for osmux so often as another endpoint
* may have already punched the hole in the firewall. This approach is simple
* though.
@@ -532,11 +545,25 @@
/* bsc-nat allocates/releases the Osmux circuit ID */
static uint8_t osmux_cid_bitmap[16];
+int osmux_used_cid(void)
+{
+ int i, j, used = 0;
+
+ for (i = 0; i < sizeof(osmux_cid_bitmap); i++) {
+ for (j = 0; j < 8; j++) {
+ if (osmux_cid_bitmap[i] & (1 << j))
+ used += 1;
+ }
+ }
+
+ return used;
+}
+
int osmux_get_cid(void)
{
int i, j;
- for (i = 0; i < sizeof(osmux_cid_bitmap) / 8; i++) {
+ for (i = 0; i < sizeof(osmux_cid_bitmap); i++) {
for (j = 0; j < 8; j++) {
if (osmux_cid_bitmap[i] & (1 << j))
continue;
diff --git a/openbsc/src/libmgcp/mgcp_protocol.c b/openbsc/src/libmgcp/mgcp_protocol.c
index ab98be1..42ce8bb 100644
--- a/openbsc/src/libmgcp/mgcp_protocol.c
+++ b/openbsc/src/libmgcp/mgcp_protocol.c
@@ -818,6 +818,10 @@
if (osmux_cid >= 0) {
endp->osmux.cid = osmux_cid;
endp->osmux.state = OSMUX_STATE_ACTIVATING;
+ } else if(endp->cfg->osmux == OSMUX_USAGE_ONLY) {
+ LOGP(DMGCP, LOGL_ERROR,
+ "Osmux only and no osmux offered on 0x%x\n", ENDPOINT_NUMBER(endp));
+ goto error2;
}
endp->allocated = 1;
@@ -1310,6 +1314,7 @@
return -1;
for (i = 0; i < tcfg->number_endpoints; ++i) {
+ tcfg->endpoints[i].osmux.allocated_cid = -1;
tcfg->endpoints[i].ci = CI_UNUSED;
tcfg->endpoints[i].cfg = tcfg->cfg;
tcfg->endpoints[i].tcfg = tcfg;
@@ -1350,6 +1355,9 @@
if (endp->osmux.state == OSMUX_STATE_ENABLED)
osmux_disable_endpoint(endp);
+ /* release the circuit ID if it had been allocated */
+ osmux_release_cid(endp);
+
memset(&endp->taps, 0, sizeof(endp->taps));
}
diff --git a/openbsc/src/libmgcp/mgcp_vty.c b/openbsc/src/libmgcp/mgcp_vty.c
index fc2f818..c478b0a 100644
--- a/openbsc/src/libmgcp/mgcp_vty.c
+++ b/openbsc/src/libmgcp/mgcp_vty.c
@@ -139,8 +139,19 @@
if (g_cfg->bts_force_ptime > 0)
vty_out(vty, " rtp force-ptime %d%s", g_cfg->bts_force_ptime, VTY_NEWLINE);
vty_out(vty, " transcoder-remote-base %u%s", g_cfg->transcoder_remote_base, VTY_NEWLINE);
- vty_out(vty, " osmux %s%s",
- g_cfg->osmux == 1 ? "on" : "off", VTY_NEWLINE);
+
+ switch (g_cfg->osmux) {
+ case OSMUX_USAGE_ON:
+ vty_out(vty, " osmux on%s", VTY_NEWLINE);
+ break;
+ case OSMUX_USAGE_ONLY:
+ vty_out(vty, " osmux only%s", VTY_NEWLINE);
+ break;
+ case OSMUX_USAGE_OFF:
+ default:
+ vty_out(vty, " osmux off%s", VTY_NEWLINE);
+ break;
+ }
if (g_cfg->osmux) {
vty_out(vty, " osmux batch-factor %d%s",
g_cfg->osmux_batch, VTY_NEWLINE);
@@ -226,6 +237,9 @@
llist_for_each_entry(trunk, &g_cfg->trunks, entry)
dump_trunk(vty, trunk, show_stats);
+ if (g_cfg->osmux)
+ vty_out(vty, "Osmux used CID: %d%s", osmux_used_cid(), VTY_NEWLINE);
+
return CMD_SUCCESS;
}
@@ -1246,18 +1260,24 @@
#define OSMUX_STR "RTP multiplexing\n"
DEFUN(cfg_mgcp_osmux,
cfg_mgcp_osmux_cmd,
- "osmux (on|off)",
- OSMUX_STR "Enable OSMUX\n" "Disable OSMUX\n")
+ "osmux (on|off|only)",
+ OSMUX_STR "Enable OSMUX\n" "Disable OSMUX\n" "Only use OSMUX\n")
{
- if (strcmp(argv[0], "on") == 0) {
- g_cfg->osmux = 1;
- if (g_cfg->trunk.audio_loop) {
- vty_out(vty, "Cannot use `loop' with `osmux'.%s",
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- } else if (strcmp(argv[0], "off") == 0)
- g_cfg->osmux = 0;
+ if (strcmp(argv[0], "off") == 0) {
+ g_cfg->osmux = OSMUX_USAGE_OFF;
+ return CMD_SUCCESS;
+ }
+
+ if (strcmp(argv[0], "on") == 0)
+ g_cfg->osmux = OSMUX_USAGE_ON;
+ else if (strcmp(argv[0], "only") == 0)
+ g_cfg->osmux = OSMUX_USAGE_ONLY;
+
+ if (g_cfg->trunk.audio_loop) {
+ vty_out(vty, "Cannot use `loop' with `osmux'.%s",
+ VTY_NEWLINE);
+ return CMD_WARNING;
+ }
return CMD_SUCCESS;
}
diff --git a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
index f19cb4c..9fd9967 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
@@ -499,6 +499,15 @@
return NULL;
}
+static int nat_osmux_only(struct mgcp_config *mgcp_cfg, struct bsc_config *bsc_cfg)
+{
+ if (mgcp_cfg->osmux == OSMUX_USAGE_ONLY)
+ return 1;
+ if (bsc_cfg->osmux == OSMUX_USAGE_ONLY)
+ return 1;
+ return 0;
+}
+
static int bsc_mgcp_policy_cb(struct mgcp_trunk_config *tcfg, int endpoint, int state, const char *transaction_id)
{
struct bsc_nat *nat;
@@ -506,7 +515,6 @@
struct nat_sccp_connection *sccp;
struct mgcp_endpoint *mgcp_endp;
struct msgb *bsc_msg;
- int osmux_cid = -1;
nat = tcfg->cfg->data;
bsc_endp = &nat->bsc_endpoints[endpoint];
@@ -544,14 +552,23 @@
}
/* Allocate a Osmux circuit ID */
- if (state == MGCP_ENDP_CRCX &&
- nat->mgcp_cfg->osmux && sccp->bsc->cfg->osmux)
- osmux_cid = osmux_get_cid();
+ if (state == MGCP_ENDP_CRCX) {
+ if (nat->mgcp_cfg->osmux && sccp->bsc->cfg->osmux) {
+ osmux_allocate_cid(mgcp_endp);
+ if (mgcp_endp->osmux.allocated_cid < 0 &&
+ nat_osmux_only(nat->mgcp_cfg, sccp->bsc->cfg)) {
+ LOGP(DMGCP, LOGL_ERROR,
+ "Rejecting usage of endpoint\n");
+ return MGCP_POLICY_REJECT;
+ }
+ }
+ }
/* we need to generate a new and patched message */
bsc_msg = bsc_mgcp_rewrite((char *) nat->mgcp_msg, nat->mgcp_length,
sccp->bsc_endp, mgcp_bts_src_addr(mgcp_endp),
- mgcp_endp->bts_end.local_port, osmux_cid,
+ mgcp_endp->bts_end.local_port,
+ mgcp_endp->osmux.allocated_cid,
&mgcp_endp->net_end.codec.payload_type,
nat->sdp_ensure_amr_mode_set);
if (!bsc_msg) {
@@ -571,10 +588,10 @@
/* Annotate the allocated Osmux CID until the bsc confirms that
* it agrees to use Osmux for this voice flow.
*/
- if (osmux_cid >= 0 &&
+ if (mgcp_endp->osmux.allocated_cid >= 0 &&
mgcp_endp->osmux.state != OSMUX_STATE_ENABLED) {
mgcp_endp->osmux.state = OSMUX_STATE_ACTIVATING;
- mgcp_endp->osmux.cid = osmux_cid;
+ mgcp_endp->osmux.cid = mgcp_endp->osmux.allocated_cid;
}
socklen_t len = sizeof(sock);
@@ -596,7 +613,7 @@
/* libmgcp clears the MGCP endpoint for us */
if (mgcp_endp->osmux.state == OSMUX_STATE_ENABLED)
- osmux_put_cid(mgcp_endp->osmux.cid);
+ osmux_release_cid(mgcp_endp);
return MGCP_POLICY_CONT;
} else {
@@ -665,8 +682,7 @@
osmux_cid);
return;
err:
- osmux_put_cid(endp->osmux.cid);
- endp->osmux.cid = -1;
+ osmux_release_cid(endp);
endp->osmux.state = OSMUX_STATE_DISABLED;
}
@@ -734,6 +750,16 @@
if (endp->osmux.state == OSMUX_STATE_ACTIVATING)
bsc_mgcp_osmux_confirm(endp, (const char *) msg->l2h);
+ /* If we require osmux and it is disabled.. fail */
+ if (nat_osmux_only(bsc->nat->mgcp_cfg, bsc->cfg) &&
+ endp->osmux.state == OSMUX_STATE_DISABLED) {
+ LOGP(DMGCP, LOGL_ERROR,
+ "Failed to activate osmux endpoint 0x%x\n",
+ ENDPOINT_NUMBER(endp));
+ free_chan_downstream(endp, bsc_endp, bsc);
+ return;
+ }
+
/* free some stuff */
talloc_free(bsc_endp->transaction_id);
bsc_endp->transaction_id = NULL;
@@ -792,7 +818,7 @@
int slen;
int ret;
char buf[40];
- char osmux_extension[strlen("X-Osmux: 255")];
+ char osmux_extension[strlen("\nX-Osmux: 255") + 1];
buf[0] = buf[39] = '\0';
ret = sscanf(tok, "%*s %s", buf);
@@ -803,7 +829,7 @@
}
if (osmux_cid >= 0)
- sprintf(osmux_extension, "\nX-Osmux: %u", osmux_cid);
+ sprintf(osmux_extension, "\nX-Osmux: %u", osmux_cid & 0xff);
else
osmux_extension[0] = '\0';
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
index 981168c..cd8293c 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
@@ -162,8 +162,14 @@
if (bsc->paging_group != -1)
vty_out(vty, " paging group %d%s", bsc->paging_group, VTY_NEWLINE);
vty_out(vty, " paging forbidden %d%s", bsc->forbid_paging, VTY_NEWLINE);
- if (bsc->osmux)
+ switch (bsc->osmux) {
+ case OSMUX_USAGE_ON:
vty_out(vty, " osmux on%s", VTY_NEWLINE);
+ break;
+ case OSMUX_USAGE_ONLY:
+ vty_out(vty, " osmux only%s", VTY_NEWLINE);
+ break;
+ }
}
static int config_write_bsc(struct vty *vty)
@@ -1124,18 +1130,20 @@
#define OSMUX_STR "RTP multiplexing\n"
DEFUN(cfg_bsc_osmux,
cfg_bsc_osmux_cmd,
- "osmux (on|off)",
- OSMUX_STR "Enable OSMUX\n" "Disable OSMUX\n")
+ "osmux (on|off|only)",
+ OSMUX_STR "Enable OSMUX\n" "Disable OSMUX\n" "Only OSMUX\n")
{
struct bsc_config *conf = vty->index;
int old = conf->osmux;
if (strcmp(argv[0], "on") == 0)
- conf->osmux = 1;
+ conf->osmux = OSMUX_USAGE_ON;
else if (strcmp(argv[0], "off") == 0)
- conf->osmux = 0;
+ conf->osmux = OSMUX_USAGE_OFF;
+ else if (strcmp(argv[0], "only") == 0)
+ conf->osmux = OSMUX_USAGE_ONLY;
- if (old == 0 && conf->osmux == 1 && !conf->nat->mgcp_cfg->osmux_init) {
+ if (old == 0 && conf->osmux > 0 && !conf->nat->mgcp_cfg->osmux_init) {
LOGP(DMGCP, LOGL_NOTICE, "Setting up OSMUX socket\n");
if (osmux_init(OSMUX_ROLE_BSC_NAT, conf->nat->mgcp_cfg) < 0) {
LOGP(DMGCP, LOGL_ERROR, "Cannot init OSMUX\n");
@@ -1143,7 +1151,7 @@
VTY_NEWLINE);
return CMD_WARNING;
}
- } else if (old == 1 && conf->osmux == 0) {
+ } else if (old > 0 && conf->osmux == 0) {
LOGP(DMGCP, LOGL_NOTICE, "Disabling OSMUX socket\n");
/* Don't stop the socket, we may already have ongoing voice
* flows already using Osmux. This just switch indicates that
diff --git a/openbsc/tests/mgcp/mgcp_test.c b/openbsc/tests/mgcp/mgcp_test.c
index b2cb938..ec86c55 100644
--- a/openbsc/tests/mgcp/mgcp_test.c
+++ b/openbsc/tests/mgcp/mgcp_test.c
@@ -1175,6 +1175,31 @@
talloc_free(cfg);
}
+static void test_osmux_cid(void)
+{
+ int id, i;
+
+ OSMO_ASSERT(osmux_used_cid() == 0);
+ id = osmux_get_cid();
+ OSMO_ASSERT(id == 0);
+ OSMO_ASSERT(osmux_used_cid() == 1);
+ osmux_put_cid(id);
+ OSMO_ASSERT(osmux_used_cid() == 0);
+
+ for (i = 0; i < 128; ++i) {
+ id = osmux_get_cid();
+ OSMO_ASSERT(id == i);
+ OSMO_ASSERT(osmux_used_cid() == i + 1);
+ }
+
+ id = osmux_get_cid();
+ OSMO_ASSERT(id == -1);
+
+ for (i = 0; i < 256; ++i)
+ osmux_put_cid(i);
+ OSMO_ASSERT(osmux_used_cid() == 0);
+}
+
int main(int argc, char **argv)
{
osmo_init_logging(&log_info);
@@ -1193,6 +1218,7 @@
test_multilple_codec();
test_no_cycle();
test_no_name();
+ test_osmux_cid();
printf("Done\n");
return EXIT_SUCCESS;