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Neels Hofmeyr gerrit-no-reply at lists.osmocom.orgNeels Hofmeyr has submitted this change and it was merged. ( https://gerrit.osmocom.org/10118 ) Change subject: IuUP hack: make RTP patching less general ...................................................................... IuUP hack: make RTP patching less general We currently still patch over an RTP message to make it look like an IuUP Initialization Ack specifically for the ip.access nano3G femto cell. Be more specific about it: - only patch over RTP in 'loopback' mode. osmo-msc specifically leaves the endpoint in loopback mode for this hack, so if we're not in 'loopback', then this hack is out of place. - only patch over RTP if the header indicates an IuUP Initialization (check for 0xe4 byte). Change-Id: Ia9ec4debc138b34f6ca6a871a8778eafa6c0ba21 --- M src/libosmo-mgcp/mgcp_network.c 1 file changed, 11 insertions(+), 4 deletions(-) Approvals: Jenkins Builder: Verified Harald Welte: Looks good to me, approved diff --git a/src/libosmo-mgcp/mgcp_network.c b/src/libosmo-mgcp/mgcp_network.c index 7d98d07..3ac93be 100644 --- a/src/libosmo-mgcp/mgcp_network.c +++ b/src/libosmo-mgcp/mgcp_network.c @@ -732,11 +732,18 @@ * '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 (!rtp_state->patched_first_rtp_payload) { + if (!rtp_state->patched_first_rtp_payload + && conn_src->conn->mode == MGCP_CONN_LOOPBACK) { uint8_t *data = (uint8_t *) & buf[12]; - data[0] = 0xe4; - data[1] = 0x00; - rtp_state->patched_first_rtp_payload = true; + if (data[0] == 0xe0) { + data[0] = 0xe4; + data[1] = 0x00; + rtp_state->patched_first_rtp_payload = true; + LOGP(DRTP, LOGL_DEBUG, + "endpoint:0x%x Patching over first two bytes" + " to fake an IuUP Initialization Ack\n", + ENDPOINT_NUMBER(endp)); + } } len = mgcp_udp_send(rtp_end->rtp.fd, -- To view, visit https://gerrit.osmocom.org/10118 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-mgw Gerrit-Branch: master Gerrit-MessageType: merged Gerrit-Change-Id: Ia9ec4debc138b34f6ca6a871a8778eafa6c0ba21 Gerrit-Change-Number: 10118 Gerrit-PatchSet: 1 Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de> Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20180724/a84f49bd/attachment.htm>