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authorHolger Hans Peter Freyther <holger@moiji-mobile.com>2015-10-02 18:15:18 +0200
committerHolger Hans Peter Freyther <holger@moiji-mobile.com>2015-10-12 09:11:25 +0200
commit20626dde8fd04c2ded3788a8417ea67abf17c4cf (patch)
tree7c31b3f1b06d3141b97ff7592b3ae921ce783384 /openbsc/src/osmo-bsc_nat
parent6598ded5cdbdaee8ee2aa9b8da283582b90840ed (diff)
osmux: Enforce Osmux only global and per BSC configuration
Extend the osmux only setting from the MGCP MGW to the NAT. This is applied when an endpoint is allocated and/or when the allocation is confirmed by the remote system. Not tested. The impact should only be when the new option is being used. Fixes: OW#1492
Diffstat (limited to 'openbsc/src/osmo-bsc_nat')
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c32
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_nat_vty.c22
2 files changed, 44 insertions, 10 deletions
diff --git a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
index f19cb4c97..bd1d96523 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 @@ struct nat_sccp_connection *bsc_mgcp_find_con(struct bsc_nat *nat, int endpoint)
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;
@@ -544,9 +553,16 @@ static int bsc_mgcp_policy_cb(struct mgcp_trunk_config *tcfg, int endpoint, int
}
/* 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_cid = osmux_get_cid();
+ if (osmux_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,
@@ -734,6 +750,16 @@ void bsc_mgcp_forward(struct bsc_connection *bsc, struct msgb *msg)
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;
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
index 981168cc1..cd8293cc9 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 @@ static void config_write_bsc_single(struct vty *vty, struct bsc_config *bsc)
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 @@ DEFUN(show_ussd_connection,
#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 @@ DEFUN(cfg_bsc_osmux,
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