diff options
| -rw-r--r-- | include/openbsc/mgcp_internal.h | 1 | ||||
| -rw-r--r-- | src/libmgcp/mgcp_network.c | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/openbsc/mgcp_internal.h b/include/openbsc/mgcp_internal.h index b58eb9b58..b2c24089d 100644 --- a/include/openbsc/mgcp_internal.h +++ b/include/openbsc/mgcp_internal.h @@ -64,6 +64,7 @@ struct mgcp_rtp_state { uint32_t stats_jitter; int32_t stats_transit; int stats_cycles; + bool patched_first_rtp_payload; /* FIXME: drop this, see OS#2459 */ }; struct mgcp_rtp_codec { diff --git a/src/libmgcp/mgcp_network.c b/src/libmgcp/mgcp_network.c index c9fe17973..399dc8fe1 100644 --- a/src/libmgcp/mgcp_network.c +++ b/src/libmgcp/mgcp_network.c @@ -667,6 +667,19 @@ int mgcp_send(struct mgcp_endpoint *endp, int dest, int is_rtp, forward_data(rtp_end->rtp.fd, &endp->taps[tap_idx], buf, len); + /* FIXME: HACK HACK HACK. See OS#2459. + * The ip.access nano3G needs the first RTP payload's first two bytes to read hex + * 'e400', or it will reject the RAB assignment. It seems to not harm other femto + * cells (as long as we patch only the first RTP payload in each stream). + */ + if (tap_idx == MGCP_TAP_BTS_OUT + && !rtp_state->patched_first_rtp_payload) { + uint8_t *data = (uint8_t*)&buf[12]; + data[0] = 0xe4; + data[1] = 0x00; + rtp_state->patched_first_rtp_payload = true; + } + rc = mgcp_udp_send(rtp_end->rtp.fd, &rtp_end->addr, rtp_end->rtp_port, buf, len); |