Initial IuUP support using proper FSMs
Related: OS#1937 Depends: libosmocore Change-Id I63ee780b4aa162ea097410b234e73984000c0965 Change-Id: I6694a21480b25ab8f35d375295be6601ce38e31d
This commit is contained in:
parent
2799ff9bb9
commit
bb3ccdea1a
|
@ -13,4 +13,5 @@ noinst_HEADERS = \
|
|||
mgcp_e1.h \
|
||||
mgcp_network.h \
|
||||
mgcp_protocol.h \
|
||||
mgcp_iuup.h \
|
||||
$(NULL)
|
||||
|
|
|
@ -28,6 +28,7 @@
|
|||
#include <osmocom/mgcp/osmux.h>
|
||||
#include <osmocom/core/linuxlist.h>
|
||||
#include <osmocom/core/rate_ctr.h>
|
||||
#include <osmocom/gsm/iuup.h>
|
||||
#include <inttypes.h>
|
||||
|
||||
#define LOGPCONN(conn, cat, level, fmt, args...) \
|
||||
|
@ -47,6 +48,7 @@ enum mgcp_conn_rtp_type {
|
|||
MGCP_RTP_DEFAULT = 0,
|
||||
MGCP_OSMUX_BSC,
|
||||
MGCP_OSMUX_BSC_NAT,
|
||||
MGCP_RTP_IUUP,
|
||||
};
|
||||
|
||||
/*! Connection type, specifies which member of the union "u" in mgcp_conn
|
||||
|
@ -93,6 +95,14 @@ struct mgcp_conn_rtp {
|
|||
} stats;
|
||||
} osmux;
|
||||
|
||||
struct {
|
||||
struct osmo_iuup_instance *iui;
|
||||
bool active_init; /* true: Send IuUP Init */
|
||||
int rfci_idx_no_data; /* Index for RFCI NO_DATA (-1 if not available) */
|
||||
bool configured;
|
||||
struct osmo_iuup_rnl_prim *init_ind;
|
||||
} iuup;
|
||||
|
||||
struct rate_ctr_group *rate_ctr_group;
|
||||
};
|
||||
|
||||
|
@ -176,6 +186,12 @@ static inline bool mgcp_conn_rtp_is_osmux(const struct mgcp_conn_rtp *conn) {
|
|||
return conn->type == MGCP_OSMUX_BSC || conn->type == MGCP_OSMUX_BSC_NAT;
|
||||
}
|
||||
|
||||
/* Was conn configured to handle Osmux? */
|
||||
static inline bool mgcp_conn_rtp_is_iuup(const struct mgcp_conn_rtp *conn)
|
||||
{
|
||||
return conn->type == MGCP_RTP_IUUP;
|
||||
}
|
||||
|
||||
struct mgcp_conn *mgcp_conn_alloc(void *ctx, struct mgcp_endpoint *endp,
|
||||
enum mgcp_conn_type type, char *name);
|
||||
struct mgcp_conn *mgcp_conn_get(struct mgcp_endpoint *endp, const char *id);
|
||||
|
|
|
@ -0,0 +1,33 @@
|
|||
/* IuUP connection functionalitites */
|
||||
|
||||
/*
|
||||
* (C) 2021 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
|
||||
* All Rights Reserved
|
||||
*
|
||||
* Author: Pau Espin Pedrol
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Affero General Public License as published by
|
||||
* the Free Software Foundation; either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Affero General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Affero General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
#pragma once
|
||||
|
||||
#include <osmocom/core/msgb.h>
|
||||
|
||||
struct mgcp_conn_rtp;
|
||||
|
||||
int mgcp_conn_iuup_init(struct mgcp_conn_rtp *conn_rtp);
|
||||
void mgcp_conn_iuup_cleanup(struct mgcp_conn_rtp *conn_rtp);
|
||||
int mgcp_conn_iuup_dispatch_rtp(struct msgb *msg);
|
||||
int mgcp_conn_iuup_send_rtp(struct mgcp_conn_rtp *conn_src_rtp, struct mgcp_conn_rtp *conn_dest_rtp, struct msgb *msg);
|
||||
int mgcp_conn_iuup_send_dummy(struct mgcp_conn_rtp *conn_rtp);
|
|
@ -70,8 +70,6 @@ struct mgcp_rtp_state {
|
|||
* data is just re-used) */
|
||||
uint16_t alt_rtp_tx_sequence;
|
||||
uint32_t alt_rtp_tx_ssrc;
|
||||
|
||||
bool patched_first_rtp_payload; /* FIXME: drop this, see OS#2459 */
|
||||
};
|
||||
|
||||
struct mgcp_rtp_codec {
|
||||
|
@ -177,3 +175,8 @@ void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp,
|
|||
void mgcp_rtp_annex_count(const struct mgcp_endpoint *endp, struct mgcp_rtp_state *state,
|
||||
const uint16_t seq, const int32_t transit,
|
||||
const uint32_t ssrc, const bool marker_bit);
|
||||
|
||||
void rtpconn_rate_ctr_add(struct mgcp_conn_rtp *conn_rtp, struct mgcp_endpoint *endp,
|
||||
int id, int inc);
|
||||
void forward_data_tap(int fd, struct mgcp_rtp_tap *tap, struct msgb *msg);
|
||||
uint32_t mgcp_get_current_ts(unsigned codec_rate);
|
||||
|
|
|
@ -48,4 +48,5 @@ libosmo_mgcp_a_SOURCES = \
|
|||
mgcp_ctrl.c \
|
||||
mgcp_ratectr.c \
|
||||
mgcp_e1.c \
|
||||
mgcp_iuup.c \
|
||||
$(NULL)
|
||||
|
|
|
@ -30,6 +30,8 @@
|
|||
#include <osmocom/mgcp/mgcp_trunk.h>
|
||||
#include <osmocom/mgcp/mgcp_sdp.h>
|
||||
#include <osmocom/mgcp/mgcp_codec.h>
|
||||
#include <osmocom/mgcp/mgcp_iuup.h>
|
||||
|
||||
#include <osmocom/gsm/gsm_utils.h>
|
||||
#include <osmocom/core/rate_ctr.h>
|
||||
#include <osmocom/core/timer.h>
|
||||
|
@ -129,6 +131,8 @@ static void mgcp_rtp_conn_cleanup(struct mgcp_conn_rtp *conn_rtp)
|
|||
{
|
||||
if (mgcp_conn_rtp_is_osmux(conn_rtp))
|
||||
conn_osmux_disable(conn_rtp);
|
||||
if (mgcp_conn_rtp_is_iuup(conn_rtp))
|
||||
mgcp_conn_iuup_cleanup(conn_rtp);
|
||||
mgcp_free_rtp_port(&conn_rtp->end);
|
||||
rate_ctr_group_free(conn_rtp->rate_ctr_group);
|
||||
mgcp_codec_reset_all(conn_rtp);
|
||||
|
|
|
@ -0,0 +1,720 @@
|
|||
/*
|
||||
* (C) 2021 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
|
||||
* All rights not specifically granted under this license are reserved.
|
||||
*
|
||||
* Author: Pau Espin Pedrol
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU Affero General Public License as published by the
|
||||
* Free Software Foundation; either version 3 of the License, or (at your
|
||||
* option) any later version.
|
||||
*/
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include <osmocom/core/byteswap.h>
|
||||
|
||||
#include <osmocom/gsm/iuup.h>
|
||||
|
||||
#include <osmocom/netif/rtp.h>
|
||||
#include <osmocom/netif/amr.h>
|
||||
|
||||
#include <osmocom/mgcp/mgcp_conn.h>
|
||||
#include <osmocom/mgcp/mgcp_iuup.h>
|
||||
#include <osmocom/mgcp/mgcp_endp.h>
|
||||
#include <osmocom/mgcp/mgcp_codec.h>
|
||||
#include <osmocom/mgcp/mgcp_network.h>
|
||||
#include <osmocom/mgcp/debug.h>
|
||||
|
||||
#define MGW_IUUP_MSGB_SIZE 4096
|
||||
|
||||
static const struct osmo_iuup_rnl_config def_configure_req = {
|
||||
.transparent = false,
|
||||
.active = true,
|
||||
.supported_versions_mask = 0x0003,
|
||||
.num_rfci = 0,
|
||||
.num_subflows = 0,
|
||||
.IPTIs_present = false,
|
||||
.t_init = { .t_ms = IUUP_TIMER_INIT_T_DEFAULT, .n_max = IUUP_TIMER_INIT_N_DEFAULT },
|
||||
.t_ta = { .t_ms = IUUP_TIMER_TA_T_DEFAULT, .n_max = IUUP_TIMER_TA_N_DEFAULT },
|
||||
.t_rc = { .t_ms = IUUP_TIMER_RC_T_DEFAULT, .n_max = IUUP_TIMER_RC_N_DEFAULT },
|
||||
};
|
||||
|
||||
/* Find a destination connection. */
|
||||
static struct mgcp_conn *_find_dst_conn(struct mgcp_conn *conn)
|
||||
{
|
||||
/* NOTE: This code path runs every time an RTP packet is received. The
|
||||
* function mgcp_find_dst_conn() we use to determine the detination
|
||||
* connection will iterate the connection list inside the endpoint.
|
||||
* Since list iterations are quite costly, we will figure out the
|
||||
* destination only once and use the optional private data pointer of
|
||||
* the connection to cache the destination connection pointer. */
|
||||
|
||||
struct mgcp_conn *conn_dst;
|
||||
if (!conn->priv) {
|
||||
conn_dst = mgcp_find_dst_conn(conn);
|
||||
conn->priv = conn_dst;
|
||||
} else {
|
||||
conn_dst = (struct mgcp_conn *)conn->priv;
|
||||
}
|
||||
return conn_dst;
|
||||
}
|
||||
|
||||
/* Find RFCI containing all 0 sizes, -1 if not found. irp is an Initialization.ind prim */
|
||||
static int _find_rfci_no_data(struct osmo_iuup_rnl_prim *irp)
|
||||
{
|
||||
int i;
|
||||
/* Find RFCI containing NO_DATA: */
|
||||
for (i = 0; i < irp->u.status.u.initialization.num_rfci; i++) {
|
||||
int j;
|
||||
bool is_no_data = true;
|
||||
for (j = 0; j < irp->u.status.u.initialization.num_subflows; j++) {
|
||||
if (irp->u.status.u.initialization.subflow_sizes[i][j]) {
|
||||
is_no_data = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (is_no_data) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Lookup RFCI to use for specific AMR codec type. -1 if none found */
|
||||
static int8_t _conn_iuup_amr_ft_2_rfci(struct mgcp_conn_rtp *conn_rtp, uint8_t ft)
|
||||
{
|
||||
int8_t i;
|
||||
unsigned match_bytes = (unsigned)osmo_amr_bytes(ft);
|
||||
struct osmo_iuup_rnl_prim *irp = conn_rtp->iuup.init_ind;
|
||||
OSMO_ASSERT(irp);
|
||||
|
||||
/* TODO: cache this somehow */
|
||||
for (i = 0; i < irp->u.status.u.initialization.num_rfci; i++) {
|
||||
int j;
|
||||
unsigned num_bits = 0;
|
||||
for (j = 0; j < irp->u.status.u.initialization.num_subflows; j++)
|
||||
num_bits += irp->u.status.u.initialization.subflow_sizes[i][j];
|
||||
if (match_bytes == (num_bits + 7)/8)
|
||||
return i;
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Helper function to configure IuUP layer FSM as Init-Passive, based on default config */
|
||||
static int _conn_iuup_configure_as_passive(struct mgcp_conn_rtp *conn_rtp)
|
||||
{
|
||||
struct osmo_iuup_rnl_prim *irp;
|
||||
int rc;
|
||||
|
||||
conn_rtp->iuup.active_init = false;
|
||||
|
||||
/* Tx CONFIG.req */
|
||||
irp = osmo_iuup_rnl_prim_alloc(conn_rtp->conn, OSMO_IUUP_RNL_CONFIG, PRIM_OP_REQUEST, MGW_IUUP_MSGB_SIZE);
|
||||
irp->u.config = def_configure_req;
|
||||
irp->u.config.active = conn_rtp->iuup.active_init;
|
||||
if ((rc = osmo_iuup_rnl_prim_down(conn_rtp->iuup.iui, irp)) == 0)
|
||||
conn_rtp->iuup.configured = true;
|
||||
else
|
||||
LOG_CONN_RTP(conn_rtp, LOGL_ERROR, "Failed configuring IuUP layer\n");
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Helper function to configure IuUP layer FSM as Init-Active, based on received
|
||||
* RNL Status-Init primitive from the sister IuUP connection we will bridge to. */
|
||||
static int _conn_iuup_configure_as_active(struct mgcp_conn_rtp *conn_rtp, struct osmo_iuup_rnl_prim *init_ind)
|
||||
{
|
||||
struct osmo_iuup_rnl_prim *irp = init_ind;
|
||||
struct osmo_iuup_rnl_prim *irp2;
|
||||
struct msgb *msg;
|
||||
bool prev_output_enabled;
|
||||
int rc;
|
||||
|
||||
conn_rtp->iuup.active_init = true;
|
||||
|
||||
/* Find RFCI containing NO_DATA: */
|
||||
conn_rtp->iuup.rfci_idx_no_data = _find_rfci_no_data(init_ind);
|
||||
|
||||
/* Copy over the rfci_idx_no_data, since we reuse the same subflow set: */
|
||||
msg = msgb_copy_c(conn_rtp->conn, irp->oph.msg, "iuup-init-copy");
|
||||
conn_rtp->iuup.init_ind = (struct osmo_iuup_rnl_prim *)msgb_data(msg);
|
||||
conn_rtp->iuup.init_ind->oph.msg = msg;
|
||||
|
||||
/* Tx CONFIG.req */
|
||||
irp2 = osmo_iuup_rnl_prim_alloc(conn_rtp->conn, OSMO_IUUP_RNL_CONFIG, PRIM_OP_REQUEST, MGW_IUUP_MSGB_SIZE);
|
||||
irp2->u.config.transparent = false;
|
||||
irp2->u.config.active = conn_rtp->iuup.active_init;
|
||||
irp2->u.config.data_pdu_type = irp->u.status.u.initialization.data_pdu_type;
|
||||
irp2->u.config.supported_versions_mask = def_configure_req.supported_versions_mask;
|
||||
irp2->u.config.num_rfci = irp->u.status.u.initialization.num_rfci;
|
||||
irp2->u.config.num_subflows = irp->u.status.u.initialization.num_subflows;
|
||||
memcpy(irp2->u.config.subflow_sizes, irp->u.status.u.initialization.subflow_sizes,
|
||||
IUUP_MAX_RFCIS * IUUP_MAX_SUBFLOWS * sizeof(irp2->u.config.subflow_sizes[0][0]));
|
||||
irp2->u.config.IPTIs_present = irp->u.status.u.initialization.IPTIs_present;
|
||||
if (irp->u.status.u.initialization.IPTIs_present)
|
||||
memcpy(irp2->u.config.IPTIs, irp->u.status.u.initialization.IPTIs,
|
||||
IUUP_MAX_RFCIS * sizeof(irp2->u.config.IPTIs[0]));
|
||||
irp2->u.config.t_init = def_configure_req.t_init;
|
||||
irp2->u.config.t_ta = def_configure_req.t_ta;
|
||||
irp2->u.config.t_rc = def_configure_req.t_rc;
|
||||
|
||||
/* We need to force allowance of RTP containing Init-ACK back: */
|
||||
prev_output_enabled = conn_rtp->end.output_enabled;
|
||||
conn_rtp->end.output_enabled = true;
|
||||
|
||||
if ((rc = osmo_iuup_rnl_prim_down(conn_rtp->iuup.iui, irp2)) == 0)
|
||||
conn_rtp->iuup.configured = true;
|
||||
else
|
||||
LOG_CONN_RTP(conn_rtp, LOGL_ERROR, "Failed configuring IuUP layer\n");
|
||||
|
||||
conn_rtp->end.output_enabled = prev_output_enabled;
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Helper function to push an RTP+IuUP pkt up to the IuUP layer FSM through the
|
||||
* TNL primitive interface. */
|
||||
static int _conn_iuup_rtp_pl_up(struct mgcp_conn_rtp *conn_rtp, struct msgb *msg)
|
||||
{
|
||||
/* Send RTP payload (IuUP) up the stack: */
|
||||
struct osmo_iuup_tnl_prim *itp;
|
||||
int rc;
|
||||
|
||||
msg->l2h = msgb_data(msg) + sizeof(struct rtp_hdr);
|
||||
|
||||
itp = osmo_iuup_tnl_prim_alloc(conn_rtp->conn, OSMO_IUUP_TNL_UNITDATA, PRIM_OP_INDICATION, MGW_IUUP_MSGB_SIZE);
|
||||
itp->oph.msg->l2h = msgb_put(itp->oph.msg, msgb_l2len(msg));
|
||||
memcpy(itp->oph.msg->l2h, msgb_l2(msg), msgb_l2len(msg));
|
||||
if ((rc = osmo_iuup_tnl_prim_up(conn_rtp->iuup.iui, itp)) != 0) {
|
||||
LOG_CONN_RTP(conn_rtp, LOGL_ERROR, "Failed passing IuUP-Init to IuUP layer\n");
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int check_rtp_iuup(const struct mgcp_conn_rtp *conn_rtp, struct msgb *msg)
|
||||
{
|
||||
size_t min_size = sizeof(struct rtp_hdr);
|
||||
/* Check there's at least 2 bytes of RTP payload (IuUP header). This is
|
||||
** mainly to avoid 0-byte payload copy cases */
|
||||
if (msgb_length(msg) < sizeof(struct rtp_hdr) + 2) {
|
||||
LOG_CONN_RTP(conn_rtp, LOGL_ERROR, "RTP-IuUP packet too short (%u < %zu)\n",
|
||||
msgb_length(msg), min_size);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Bridge received IuUP packet in conn_rtp_src to conn_rtp_dst, an IuUP sister
|
||||
* conn in the endpoint. The function takes ownsership of the irp */
|
||||
static int bridge_iuup_to_iuup_peer(struct mgcp_conn_rtp *conn_rtp_src, struct mgcp_conn_rtp *conn_rtp_dst, struct osmo_iuup_rnl_prim *irp)
|
||||
{
|
||||
int rc;
|
||||
|
||||
/* If we are not configured and we received bridged data, it means
|
||||
* conn_rtp_src is already configured and INITed, and we can infer
|
||||
* conn_rtp_src is Init-passive (RNC side), so conn_rtp_dst needs to be
|
||||
* configured as INIT-active: */
|
||||
if (!conn_rtp_dst->iuup.configured) {
|
||||
OSMO_ASSERT(conn_rtp_src->iuup.init_ind);
|
||||
rc = _conn_iuup_configure_as_active(conn_rtp_dst, conn_rtp_src->iuup.init_ind);
|
||||
if (rc < 0) {
|
||||
msgb_free(irp->oph.msg);
|
||||
return rc;
|
||||
}
|
||||
}
|
||||
|
||||
/* We simply forward the msg, without freeing it: */
|
||||
talloc_steal(conn_rtp_dst->conn, irp->oph.msg);
|
||||
irp->oph.operation = PRIM_OP_REQUEST;
|
||||
if ((rc = osmo_iuup_rnl_prim_down(conn_rtp_dst->iuup.iui, irp)) != 0)
|
||||
LOG_CONN_RTP(conn_rtp_dst, LOGL_ERROR, "Failed Tx data down to IuUP layer\n");
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Bridge received IuUP packet in conn_rtp_src to conn_rtp_dst, an RTP (no IuUP)
|
||||
* sister conn in the endpoint. The function takes ownsership of the irp */
|
||||
static int bridge_iuup_to_rtp_peer(struct mgcp_conn_rtp *conn_rtp_src, struct mgcp_conn_rtp *conn_rtp_dst, struct osmo_iuup_rnl_prim *irp)
|
||||
{
|
||||
/* FIXME: We probably need transcoding here?! Or at least look up AMR modes and translate to related RFCI */
|
||||
uint8_t frame_nr = irp->u.data.frame_nr;
|
||||
uint8_t fqc = irp->u.data.fqc;
|
||||
struct msgb *msg = irp->oph.msg;
|
||||
ssize_t amr_length = 0;
|
||||
int ft;
|
||||
uint8_t *amr_data;
|
||||
struct rtp_hdr *rtp_hdr;
|
||||
struct amr_hdr *amr_hdr;
|
||||
int rc;
|
||||
|
||||
ft = osmo_amr_bytes_to_ft(msgb_l3len(msg));
|
||||
if (ft < 0) {
|
||||
LOGPCONN(conn_rtp_src->conn, DRTP, LOGL_ERROR,
|
||||
"Unknown AMR format for size %u\n", msgb_l3len(msg));
|
||||
msgb_free(msg);
|
||||
return ft;
|
||||
}
|
||||
msgb_pull_to_l3(msg);
|
||||
LOGP(DLMGCP, LOGL_DEBUG, "Convert Iuup -> AMR: ft %d, len %d\n", ft, msgb_l3len(msg));
|
||||
|
||||
if (mgcp_codec_amr_is_octet_aligned(conn_rtp_dst->end.codec)) {
|
||||
amr_hdr = (struct amr_hdr *) msgb_push(msg, sizeof(struct amr_hdr));
|
||||
amr_hdr->cmr = 15; /* no change */
|
||||
amr_hdr->f = 0;
|
||||
amr_hdr->q = !fqc;
|
||||
amr_hdr->ft = ft & 0xff;
|
||||
amr_hdr->pad1 = 0;
|
||||
amr_hdr->pad2 = 0;
|
||||
} else {
|
||||
OSMO_ASSERT(msgb_tailroom(msg) >= 2);
|
||||
msgb_put(msg, 2);
|
||||
osmo_amr_iuup_to_bwe(msgb_data(msg), msgb_length(msg) - 2, msgb_length(msg) + 2);
|
||||
/* fill bwe header */
|
||||
amr_data = msgb_data(msg);
|
||||
/* CMR no change | follow bit | ft (3 of 4 bits) */
|
||||
amr_data[0] = 15 << 4 | (0 << 3) | (ft >> 1);
|
||||
amr_data[1] |= ((ft & 0x1) << 7) | (((!fqc) & 0x1) << 6);
|
||||
amr_length = (osmo_amr_bits(ft) + 10 + 7) / 8;
|
||||
msgb_trim(msg, amr_length);
|
||||
}
|
||||
rtp_hdr = (struct rtp_hdr *) msgb_push(msg, sizeof(*rtp_hdr));
|
||||
*rtp_hdr = (struct rtp_hdr){
|
||||
.csrc_count = 0,
|
||||
.extension = 0,
|
||||
.padding = 0,
|
||||
.version = 0,
|
||||
.payload_type = conn_rtp_dst->end.codec->payload_type,
|
||||
.marker = 0,
|
||||
.sequence = frame_nr,
|
||||
.timestamp = 0,
|
||||
.ssrc = 0
|
||||
};
|
||||
|
||||
rc = mgcp_send(conn_rtp_dst->conn->endp, true, NULL, msg, conn_rtp_src, conn_rtp_dst);
|
||||
msgb_free(msg);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Handle RNL Data primitive received from the IuUP layer FSM: Bridge it to the
|
||||
* sister connection in the endpoint: */
|
||||
static int _conn_iuup_rx_rnl_data(struct mgcp_conn_rtp *conn_rtp_src, struct osmo_iuup_rnl_prim *irp)
|
||||
{
|
||||
struct mgcp_conn *conn_dst;
|
||||
struct mgcp_conn_rtp *conn_rtp_dst;
|
||||
int rc;
|
||||
|
||||
conn_dst = _find_dst_conn(conn_rtp_src->conn);
|
||||
|
||||
/* There is no destination conn, stop here */
|
||||
if (!conn_dst) {
|
||||
LOGPCONN(conn_rtp_src->conn, DRTP, LOGL_DEBUG,
|
||||
"no connection to forward an incoming IuUP payload to\n");
|
||||
rc = -1;
|
||||
goto free_ret;
|
||||
}
|
||||
|
||||
/* The destination conn is not an RTP/IuUP connection */
|
||||
if (conn_dst->type != MGCP_CONN_TYPE_RTP) {
|
||||
LOGPCONN(conn_rtp_src->conn, DRTP, LOGL_ERROR,
|
||||
"unable to find suitable destination conn\n");
|
||||
rc = -1;
|
||||
goto free_ret;
|
||||
}
|
||||
conn_rtp_dst = &conn_dst->u.rtp;
|
||||
|
||||
switch (conn_rtp_dst->type) {
|
||||
case MGCP_RTP_IUUP:
|
||||
return bridge_iuup_to_iuup_peer(conn_rtp_src, conn_rtp_dst, irp);
|
||||
case MGCP_RTP_DEFAULT:
|
||||
return bridge_iuup_to_rtp_peer(conn_rtp_src, conn_rtp_dst, irp);
|
||||
case MGCP_OSMUX_BSC:
|
||||
case MGCP_OSMUX_BSC_NAT:
|
||||
default:
|
||||
LOGPCONN(conn_rtp_src->conn, DRTP, LOGL_ERROR,
|
||||
"Forward of IuUP payload to RTP connection type %u not supported!\n",
|
||||
conn_rtp_dst->type);
|
||||
rc = 0;
|
||||
}
|
||||
|
||||
free_ret:
|
||||
msgb_free(irp->oph.msg);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Handle RNL Status-Init primitive received from the IuUP layer FSM.
|
||||
* Potentially configure sister conn as IuUP Init-Active: */
|
||||
static int _conn_iuup_rx_rnl_status_init(struct mgcp_conn_rtp *conn_rtp_src, struct osmo_iuup_rnl_prim *irp)
|
||||
{
|
||||
struct mgcp_conn *conn_dst;
|
||||
struct mgcp_conn_rtp *conn_rtp_dst;
|
||||
int rc = 0;
|
||||
struct msgb *msg;
|
||||
|
||||
/* Find RFCI containing NO_DATA: */
|
||||
conn_rtp_src->iuup.rfci_idx_no_data = _find_rfci_no_data(irp);
|
||||
|
||||
msg = msgb_copy_c(conn_rtp_src->conn, irp->oph.msg, "iuup-init-copy");
|
||||
conn_rtp_src->iuup.init_ind = (struct osmo_iuup_rnl_prim *)msgb_data(msg);
|
||||
conn_rtp_src->iuup.init_ind->oph.msg = msg;
|
||||
|
||||
conn_dst = _find_dst_conn(conn_rtp_src->conn);
|
||||
/* If not yet there, peer will potentially be IuUP-Initialized later
|
||||
* when we attempt to bridge audio towards it. See bridge_iuup_to_iuup_peer() */
|
||||
if (!conn_dst)
|
||||
return 0;
|
||||
conn_rtp_dst = &conn_dst->u.rtp;
|
||||
if (!mgcp_conn_rtp_is_iuup(conn_rtp_dst))
|
||||
return 0; /* Nothing to do */
|
||||
|
||||
/* We received IuUP parameters on the peer (RNC), Init actively this conn (against CN): */
|
||||
if (!conn_rtp_dst->iuup.configured)
|
||||
rc = _conn_iuup_configure_as_active(conn_rtp_dst, irp);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Handle RNL Status primitives received from the IuUP layer FSM: */
|
||||
static int _conn_iuup_rx_rnl_status(struct mgcp_conn_rtp *conn_rtp_src, struct osmo_iuup_rnl_prim *irp)
|
||||
{
|
||||
int rc;
|
||||
|
||||
switch (irp->u.status.procedure) {
|
||||
case IUUP_PROC_INIT:
|
||||
rc = _conn_iuup_rx_rnl_status_init(conn_rtp_src, irp);
|
||||
break;
|
||||
case IUUP_PROC_RATE_CTRL:
|
||||
case IUUP_PROC_TIME_ALIGN:
|
||||
case IUUP_PROC_ERR_EVENT:
|
||||
default:
|
||||
LOG_CONN_RTP(conn_rtp_src, LOGL_ERROR,
|
||||
"Received IuUP RNL STATUS procedure type %u not handled\n",
|
||||
irp->u.status.procedure);
|
||||
rc = 0;
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Received RNL primitive from the IuUP layer FSM containing IuUP Status or
|
||||
* data. Continue pushing it up the stack, either IuUP Status or Data: */
|
||||
static int _conn_iuup_user_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
|
||||
{
|
||||
struct mgcp_conn_rtp *conn_rtp_src = ctx;
|
||||
struct osmo_iuup_rnl_prim *irp = (struct osmo_iuup_rnl_prim *)oph;
|
||||
struct msgb *msg = oph->msg;
|
||||
int rc;
|
||||
|
||||
switch (OSMO_PRIM_HDR(&irp->oph)) {
|
||||
case OSMO_PRIM(OSMO_IUUP_RNL_DATA, PRIM_OP_INDICATION):
|
||||
/* we pass ownsership of msg here: */
|
||||
rc = _conn_iuup_rx_rnl_data(conn_rtp_src, irp);
|
||||
break;
|
||||
case OSMO_PRIM(OSMO_IUUP_RNL_STATUS, PRIM_OP_INDICATION):
|
||||
rc = _conn_iuup_rx_rnl_status(conn_rtp_src, irp);
|
||||
msgb_free(msg);
|
||||
break;
|
||||
default:
|
||||
msgb_free(msg);
|
||||
OSMO_ASSERT(false);
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
/*! Send |RTP+IuUP| data down the stack of the specified destination connection.
|
||||
* \param[in] endp associated endpoint (for configuration, logging).
|
||||
* \param[in] buf buffer that contains the |RTP+IuUP| data.
|
||||
* \param[in] len length of the buffer that contains the |RTP+IuUP| data.
|
||||
* \param[in] conn_src associated source connection.
|
||||
* \param[in] conn_dst associated destination connection.
|
||||
* \returns 0 on success, -1 on ERROR. */
|
||||
static int mgcp_send_iuup(struct mgcp_endpoint *endp, struct msgb *msg,
|
||||
struct mgcp_conn_rtp *conn_src, struct mgcp_conn_rtp *conn_dst)
|
||||
{
|
||||
/*! When no destination connection is available (e.g. when only one
|
||||
* connection in loopback mode exists), then the source connection
|
||||
* shall be specified as destination connection */
|
||||
|
||||
struct mgcp_rtp_end *rtp_end;
|
||||
struct mgcp_rtp_state *rtp_state;
|
||||
char ipbuf[INET6_ADDRSTRLEN];
|
||||
struct rtp_hdr *hdr = (struct rtp_hdr *)msgb_data(msg);
|
||||
int buflen = msgb_length(msg);
|
||||
char *dest_name;
|
||||
int len;
|
||||
|
||||
OSMO_ASSERT(conn_src);
|
||||
OSMO_ASSERT(conn_dst);
|
||||
|
||||
LOGPENDP(endp, DRTP, LOGL_DEBUG, "delivering IuUP packet...\n");
|
||||
|
||||
/* Note: In case of loopback configuration, both, the source and the
|
||||
* destination will point to the same connection. */
|
||||
rtp_end = &conn_dst->end;
|
||||
rtp_state = &conn_src->state;
|
||||
dest_name = conn_dst->conn->name;
|
||||
|
||||
/* Ensure we have an alternative SSRC in case we need it, see also
|
||||
* gen_rtp_header() */
|
||||
if (rtp_state->alt_rtp_tx_ssrc == 0)
|
||||
rtp_state->alt_rtp_tx_ssrc = rand();
|
||||
|
||||
if (!rtp_end->output_enabled) {
|
||||
rtpconn_rate_ctr_add(conn_dst, endp, RTP_DROPPED_PACKETS_CTR, 1);
|
||||
LOGPENDP(endp, DRTP, LOGL_DEBUG,
|
||||
"output disabled, drop to %s %s "
|
||||
"rtp_port:%u rtcp_port:%u\n",
|
||||
dest_name,
|
||||
osmo_sockaddr_ntop(&rtp_end->addr.u.sa, ipbuf),
|
||||
ntohs(rtp_end->rtp_port), ntohs(rtp_end->rtcp_port)
|
||||
);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Specs say, in IuUP, the RTP seqnum and timestamp should actually be
|
||||
* ignored by the receiver, but still it's useful for debug purposes
|
||||
* to set it. Moreover, it seems ip.access nano3g produces much worse
|
||||
* audio output on the air side if timestamp is not set properly. */
|
||||
hdr->timestamp = osmo_htonl(mgcp_get_current_ts(rtp_end->codec->rate));
|
||||
hdr->sequence = osmo_htons(rtp_state->alt_rtp_tx_sequence);
|
||||
hdr->ssrc = rtp_state->alt_rtp_tx_ssrc;
|
||||
|
||||
LOGPENDP(endp, DRTP, LOGL_DEBUG,
|
||||
"process/send IuUP to %s %s rtp_port:%u rtcp_port:%u\n",
|
||||
dest_name, osmo_sockaddr_ntop(&rtp_end->addr.u.sa, ipbuf),
|
||||
ntohs(rtp_end->rtp_port), ntohs(rtp_end->rtcp_port));
|
||||
|
||||
/* Forward a copy of the RTP data to a debug ip/port */
|
||||
forward_data_tap(rtp_end->rtp.fd, &conn_src->tap_out,
|
||||
msg);
|
||||
|
||||
len = mgcp_udp_send(rtp_end->rtp.fd, &rtp_end->addr, rtp_end->rtp_port,
|
||||
(char *)hdr, buflen);
|
||||
|
||||
if (len <= 0)
|
||||
return len;
|
||||
|
||||
rtpconn_rate_ctr_add(conn_dst, endp, RTP_PACKETS_TX_CTR, 1);
|
||||
rtpconn_rate_ctr_add(conn_dst, endp, RTP_OCTETS_TX_CTR, len);
|
||||
rtp_state->alt_rtp_tx_sequence++;
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
/* Received TNL primitive from IuUP layer FSM, transmit it further down to the
|
||||
* socket towards destination peer. */
|
||||
static int _conn_iuup_transport_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
|
||||
{
|
||||
struct mgcp_conn_rtp *conn_rtp_dst = ctx;
|
||||
struct mgcp_conn *conn_dst = conn_rtp_dst->conn;
|
||||
struct osmo_iuup_tnl_prim *itp = (struct osmo_iuup_tnl_prim *)oph;
|
||||
struct mgcp_conn *conn_src;
|
||||
struct msgb *msg;
|
||||
struct rtp_hdr *rtph;
|
||||
|
||||
OSMO_ASSERT(OSMO_PRIM_HDR(&itp->oph) == OSMO_PRIM(OSMO_IUUP_TNL_UNITDATA, PRIM_OP_REQUEST));
|
||||
|
||||
msg = oph->msg;
|
||||
talloc_steal(conn_rtp_dst->conn, msg);
|
||||
|
||||
msgb_pull_to_l2(msg);
|
||||
rtph = (struct rtp_hdr *)msgb_push(msg, sizeof(*rtph));
|
||||
/* TODO: fill rtph properly: */
|
||||
*rtph = (struct rtp_hdr){
|
||||
.csrc_count = 0,
|
||||
.extension = 0,
|
||||
.padding = 0,
|
||||
.version = 2,
|
||||
.payload_type = conn_rtp_dst->end.codec->payload_type,
|
||||
.marker = 0,
|
||||
.sequence = 0,
|
||||
.timestamp = 0,
|
||||
.ssrc = 0
|
||||
};
|
||||
|
||||
/* The destination of the destination conn is the source conn, right? */
|
||||
conn_src = _find_dst_conn(conn_dst);
|
||||
if (!conn_src) {
|
||||
LOG_CONN_RTP(conn_rtp_dst, LOGL_NOTICE,
|
||||
"Couldn't find source conn for IuUP dst conn\n");
|
||||
/* If there's no sister connection we are either still
|
||||
* initializing (so we want to send back Init (ACK)), or we are
|
||||
* probably in loopback mode anyway, so use dst as src. */
|
||||
conn_src = conn_dst;
|
||||
}
|
||||
|
||||
return mgcp_send_iuup(conn_dst->endp, msg, &conn_src->u.rtp, conn_rtp_dst);
|
||||
}
|
||||
|
||||
/* Used to upgrade a regular RTP connection (MGCP_RTP_DEFAULT) to become a IuUP
|
||||
* connection (MGCP_RTP_IUUP) */
|
||||
int mgcp_conn_iuup_init(struct mgcp_conn_rtp *conn_rtp)
|
||||
{
|
||||
conn_rtp->type = MGCP_RTP_IUUP;
|
||||
conn_rtp->iuup.iui = osmo_iuup_instance_alloc(conn_rtp->conn, conn_rtp->conn->id);
|
||||
OSMO_ASSERT(conn_rtp->iuup.iui);
|
||||
osmo_iuup_instance_set_user_prim_cb(conn_rtp->iuup.iui, _conn_iuup_user_prim_cb, conn_rtp);
|
||||
osmo_iuup_instance_set_transport_prim_cb(conn_rtp->iuup.iui, _conn_iuup_transport_prim_cb, conn_rtp);
|
||||
conn_rtp->iuup.rfci_idx_no_data = -1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Cleanup specific IuUP connection (MGCP_RTP_IUUP) state, allocated by mgcp_conn_iuup_init() */
|
||||
void mgcp_conn_iuup_cleanup(struct mgcp_conn_rtp *conn_rtp)
|
||||
{
|
||||
osmo_iuup_instance_free(conn_rtp->iuup.iui);
|
||||
conn_rtp->iuup.iui = NULL;
|
||||
}
|
||||
|
||||
/* Received RTP+IuUP pkt from socket of conn_rtp_src, build a TNL primitive to
|
||||
* push it further up the stack to the IuUP layer FSM to handle and/or bridge it */
|
||||
int mgcp_conn_iuup_dispatch_rtp(struct msgb *msg)
|
||||
{
|
||||
struct osmo_rtp_msg_ctx *mc = OSMO_RTP_MSG_CTX(msg);
|
||||
struct mgcp_conn_rtp *conn_rtp_src = mc->conn_src;
|
||||
int rc = 0;
|
||||
bool force_output_enabled = false;
|
||||
bool prev_output_enabled;
|
||||
struct osmo_sockaddr prev_rem_addr;
|
||||
uint16_t prev_rem_rtp_port;
|
||||
|
||||
OSMO_ASSERT(mgcp_conn_rtp_is_iuup(conn_rtp_src));
|
||||
|
||||
if ((rc = check_rtp_iuup(conn_rtp_src, msg)) < 0)
|
||||
goto free_ret;
|
||||
|
||||
if (!conn_rtp_src->iuup.configured) {
|
||||
/* We received the first message without sending any, the peer is the active side (RNC). */
|
||||
rc = _conn_iuup_configure_as_passive(conn_rtp_src);
|
||||
if (rc < 0)
|
||||
goto free_ret;
|
||||
/* We need to force allowance of RTP containing Init-ACK back: */
|
||||
prev_output_enabled = conn_rtp_src->end.output_enabled;
|
||||
conn_rtp_src->end.output_enabled = true;
|
||||
force_output_enabled = true;
|
||||
/* Fill in the peer address so that we can send Init-ACK back: */
|
||||
prev_rem_addr = conn_rtp_src->end.addr;
|
||||
prev_rem_rtp_port = conn_rtp_src->end.rtp_port;
|
||||
conn_rtp_src->end.addr = *mc->from_addr;
|
||||
conn_rtp_src->end.rtp_port = htons(osmo_sockaddr_port(&mc->from_addr->u.sa));
|
||||
}
|
||||
|
||||
rc = _conn_iuup_rtp_pl_up(conn_rtp_src, msg);
|
||||
|
||||
if (force_output_enabled) {
|
||||
conn_rtp_src->end.output_enabled = prev_output_enabled;
|
||||
conn_rtp_src->end.addr = prev_rem_addr;
|
||||
conn_rtp_src->end.rtp_port = prev_rem_rtp_port;
|
||||
}
|
||||
|
||||
return rc;
|
||||
free_ret:
|
||||
msgb_free(msg);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Build IuUP RNL Data primitive from msg containing an incoming RTP pkt from
|
||||
* peer and send it down the IuUP layer towards the destination as IuUP/RTP: */
|
||||
int mgcp_conn_iuup_send_rtp(struct mgcp_conn_rtp *conn_src_rtp, struct mgcp_conn_rtp *conn_dest_rtp, struct msgb *msg)
|
||||
{
|
||||
struct osmo_iuup_rnl_prim *irp;
|
||||
struct rtp_hdr *rtph;
|
||||
int rc = -1;
|
||||
int iuup_length = 0;
|
||||
int8_t rfci;
|
||||
|
||||
/* Tx RNL-DATA.req */
|
||||
rtph = (struct rtp_hdr *)msgb_data(msg);
|
||||
msgb_pull(msg, sizeof(*rtph));
|
||||
|
||||
/* FIXME: validate amr packets */
|
||||
irp = osmo_iuup_rnl_prim_alloc(conn_dest_rtp->conn, OSMO_IUUP_RNL_DATA, PRIM_OP_REQUEST, MGW_IUUP_MSGB_SIZE);
|
||||
irp->u.data.frame_nr = htons(rtph->sequence) % 16;
|
||||
|
||||
/* TODO: CMR handling & multiple frames handling */
|
||||
|
||||
if (strcmp(conn_src_rtp->end.codec->subtype_name, "AMR") != 0) {
|
||||
LOG_CONN_RTP(conn_src_rtp, LOGL_ERROR,
|
||||
"Bridge RTP=>IuUP: Bridging src codec %s to IuUP AMR not supported\n",
|
||||
conn_src_rtp->end.codec->subtype_name);
|
||||
goto free_ret;
|
||||
}
|
||||
if (mgcp_codec_amr_is_octet_aligned(conn_src_rtp->end.codec)) {
|
||||
struct amr_hdr *amr_hdr = (struct amr_hdr *) msgb_data(msg);
|
||||
if (msgb_length(msg) < (sizeof(*amr_hdr))) {
|
||||
LOG_CONN_RTP(conn_src_rtp, LOGL_NOTICE,
|
||||
"Bridge RTP=>IuUP: too short for AMR OA hdr (%u)\n", msgb_length(msg));
|
||||
goto free_ret;
|
||||
}
|
||||
if (amr_hdr->ft >= AMR_FT_MAX) {
|
||||
LOG_CONN_RTP(conn_src_rtp, LOGL_NOTICE, "Bridge RTP=>IuUP: wrong AMR OA ft=%u\n", amr_hdr->ft);
|
||||
goto free_ret;
|
||||
}
|
||||
if ((rfci = _conn_iuup_amr_ft_2_rfci(conn_dest_rtp, amr_hdr->ft)) < 0) {
|
||||
LOG_CONN_RTP(conn_dest_rtp, LOGL_NOTICE, "Bridge RTP=>IuUP: No RFCI found for AMR OA ft=%u\n", amr_hdr->ft);
|
||||
goto free_ret;
|
||||
}
|
||||
irp->u.data.fqc = amr_hdr->q;
|
||||
irp->u.data.rfci = rfci;
|
||||
msgb_pull(msg, 2);
|
||||
} else {
|
||||
uint8_t *amr_bwe_hdr = (uint8_t *) msgb_data(msg);
|
||||
int8_t ft;
|
||||
if (msgb_length(msg) < 2) {
|
||||
LOG_CONN_RTP(conn_src_rtp, LOGL_NOTICE,
|
||||
"Bridge RTP=>IuUP: too short for AMR BE hdr (%u)\n", msgb_length(msg));
|
||||
goto free_ret;
|
||||
}
|
||||
ft = ((amr_bwe_hdr[0] & 0x07) << 1) | ((amr_bwe_hdr[1] & 0x80) >> 7);
|
||||
if (ft >= AMR_FT_MAX) {
|
||||
LOG_CONN_RTP(conn_src_rtp, LOGL_NOTICE, "Bridge RTP=>IuUP: wrong AMR BE ft=%u\n", ft);
|
||||
goto free_ret;
|
||||
}
|
||||
if ((rfci = _conn_iuup_amr_ft_2_rfci(conn_dest_rtp, ft)) < 0) {
|
||||
LOG_CONN_RTP(conn_dest_rtp, LOGL_NOTICE, "Bridge RTP=>IuUP: No RFCI found for AMR BE ft=%u\n", ft);
|
||||
goto free_ret;
|
||||
}
|
||||
irp->u.data.fqc = ((amr_bwe_hdr[1] & 0x40) >> 6);
|
||||
irp->u.data.rfci = rfci;
|
||||
rc = iuup_length = osmo_amr_bwe_to_iuup(msgb_data(msg), msgb_length(msg));
|
||||
if (rc < 0) {
|
||||
LOG_CONN_RTP(conn_dest_rtp, LOGL_ERROR, "Bridge RTP=>IuUP: Failed convert the RTP/AMR to IuUP payload\n");
|
||||
return rc;
|
||||
}
|
||||
msgb_trim(msg, iuup_length);
|
||||
}
|
||||
|
||||
irp->oph.msg->l3h = msgb_put(irp->oph.msg, msgb_length(msg));
|
||||
memcpy(irp->oph.msg->l3h, msgb_data(msg), msgb_length(msg));
|
||||
if ((rc = osmo_iuup_rnl_prim_down(conn_dest_rtp->iuup.iui, irp)) != 0)
|
||||
LOG_CONN_RTP(conn_dest_rtp, LOGL_ERROR, "Bridge RTP=>IuUP: Failed Tx RTP payload down the IuUP layer\n");
|
||||
return rc;
|
||||
|
||||
free_ret:
|
||||
msgb_free(irp->oph.msg);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Build IuUP RNL Data primitive from msg containing dummy content and send it
|
||||
* down the IuUP layer towards the destination as IuUP/RTP: */
|
||||
int mgcp_conn_iuup_send_dummy(struct mgcp_conn_rtp *conn_rtp)
|
||||
{
|
||||
struct osmo_iuup_rnl_prim *irp;
|
||||
int rc;
|
||||
|
||||
if (conn_rtp->iuup.rfci_idx_no_data == -1) {
|
||||
LOG_CONN_RTP(conn_rtp, LOGL_NOTICE, "No RFCI NO_DATA found, unable to send dummy packet\n");
|
||||
return -ENOTSUP;
|
||||
}
|
||||
|
||||
irp = osmo_iuup_rnl_prim_alloc(conn_rtp->conn, OSMO_IUUP_RNL_DATA, PRIM_OP_REQUEST, MGW_IUUP_MSGB_SIZE);
|
||||
irp->u.data.frame_nr = 0;
|
||||
irp->u.data.fqc = IUUP_FQC_FRAME_GOOD;
|
||||
irp->u.data.rfci = conn_rtp->iuup.rfci_idx_no_data;
|
||||
irp->oph.msg->l3h = irp->oph.msg->tail;
|
||||
if ((rc = osmo_iuup_rnl_prim_down(conn_rtp->iuup.iui, irp)) != 0) {
|
||||
LOG_CONN_RTP(conn_rtp, LOGL_ERROR, "Failed Tx RTP dummy payload down the IuUP layer\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
|
@ -48,7 +48,7 @@
|
|||
#include <osmocom/mgcp/debug.h>
|
||||
#include <osmocom/codec/codec.h>
|
||||
#include <osmocom/mgcp/mgcp_e1.h>
|
||||
|
||||
#include <osmocom/mgcp/mgcp_iuup.h>
|
||||
|
||||
#define RTP_SEQ_MOD (1 << 16)
|
||||
#define RTP_MAX_DROPOUT 3000
|
||||
|
@ -59,7 +59,7 @@ enum rtp_proto {
|
|||
MGCP_PROTO_RTCP,
|
||||
};
|
||||
|
||||
static void rtpconn_rate_ctr_add(struct mgcp_conn_rtp *conn_rtp, struct mgcp_endpoint *endp,
|
||||
void rtpconn_rate_ctr_add(struct mgcp_conn_rtp *conn_rtp, struct mgcp_endpoint *endp,
|
||||
int id, int inc)
|
||||
{
|
||||
struct rate_ctr_group *conn_stats = conn_rtp->rate_ctr_group;
|
||||
|
@ -156,7 +156,7 @@ void mgcp_get_local_addr(char *addr, struct mgcp_conn_rtp *conn)
|
|||
/* This does not need to be a precision timestamp and
|
||||
* is allowed to wrap quite fast. The returned value is
|
||||
* 1/codec_rate seconds. */
|
||||
static uint32_t get_current_ts(unsigned codec_rate)
|
||||
uint32_t mgcp_get_current_ts(unsigned codec_rate)
|
||||
{
|
||||
struct timespec tp;
|
||||
uint64_t ret;
|
||||
|
@ -529,7 +529,7 @@ void mgcp_patch_and_count(const struct mgcp_endpoint *endp,
|
|||
rtp_hdr = (struct rtp_hdr *)msgb_data(msg);
|
||||
seq = ntohs(rtp_hdr->sequence);
|
||||
timestamp = ntohl(rtp_hdr->timestamp);
|
||||
arrival_time = get_current_ts(rtp_end->codec->rate);
|
||||
arrival_time = mgcp_get_current_ts(rtp_end->codec->rate);
|
||||
ssrc = ntohl(rtp_hdr->ssrc);
|
||||
marker_bit = !!rtp_hdr->marker;
|
||||
transit = arrival_time - timestamp;
|
||||
|
@ -789,7 +789,7 @@ static int amr_oa_check(char *data, int len)
|
|||
|
||||
/* Forward data to a debug tap. This is debug function that is intended for
|
||||
* debugging the voice traffic with tools like gstreamer */
|
||||
static void forward_data(int fd, struct mgcp_rtp_tap *tap, struct msgb *msg)
|
||||
void forward_data_tap(int fd, struct mgcp_rtp_tap *tap, struct msgb *msg)
|
||||
{
|
||||
int rc;
|
||||
|
||||
|
@ -815,7 +815,7 @@ static void gen_rtp_header(struct msgb *msg, struct mgcp_rtp_end *rtp_end,
|
|||
|
||||
hdr->version = 2;
|
||||
hdr->payload_type = rtp_end->codec->payload_type;
|
||||
hdr->timestamp = osmo_htonl(get_current_ts(rtp_end->codec->rate));
|
||||
hdr->timestamp = osmo_htonl(mgcp_get_current_ts(rtp_end->codec->rate));
|
||||
hdr->sequence = osmo_htons(state->alt_rtp_tx_sequence);
|
||||
hdr->ssrc = state->alt_rtp_tx_ssrc;
|
||||
}
|
||||
|
@ -975,7 +975,7 @@ static int check_rtp(struct mgcp_conn_rtp *conn_src, struct msgb *msg)
|
|||
* the length is because we currently handle IUUP packets as RTP
|
||||
* packets, so they must pass this check, if we weould be more
|
||||
* strict here, we would possibly break 3G. (see also FIXME note
|
||||
* below */
|
||||
* below.*/
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
@ -1013,6 +1013,19 @@ static int mgcp_send_rtp(struct mgcp_conn_rtp *conn_dst, struct msgb *msg)
|
|||
"endpoint type is MGCP_OSMUX_BSC_NAT, "
|
||||
"using osmux_xfrm_to_osmux() to forward data through OSMUX\n");
|
||||
return osmux_xfrm_to_osmux((char*)msgb_data(msg), msgb_length(msg), conn_dst);
|
||||
case MGCP_RTP_IUUP:
|
||||
if (proto == MGCP_PROTO_RTP) {
|
||||
LOGPENDP(endp, DRTP, LOGL_DEBUG,
|
||||
"endpoint type is MGCP_RTP_IUUP, "
|
||||
"using mgcp_conn_iuup_send_rtp() to forward data over IuUP\n");
|
||||
return mgcp_conn_iuup_send_rtp(conn_src, conn_dst, msg);
|
||||
}
|
||||
/* RTCP: we forward as usual for regular RTP connection */
|
||||
LOGPENDP(endp, DRTP, LOGL_DEBUG,
|
||||
"endpoint type is MGCP_RTP_IUUP and proto!=MGCP_PROTO_RTP, "
|
||||
"using mgcp_send() to forward data directly\n");
|
||||
return mgcp_send(endp, false,
|
||||
mc->from_addr, msg, conn_src, conn_dst);
|
||||
}
|
||||
|
||||
/* If the data has not been handled/forwarded until here, it will
|
||||
|
@ -1073,8 +1086,11 @@ int mgcp_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn)
|
|||
if (check_rtp_destin(conn) != 0)
|
||||
goto failed;
|
||||
|
||||
rc = mgcp_udp_send(conn->end.rtp.fd, &conn->end.addr,
|
||||
conn->end.rtp_port, rtp_dummy_payload, sizeof(rtp_dummy_payload));
|
||||
if (mgcp_conn_rtp_is_iuup(conn))
|
||||
rc = mgcp_conn_iuup_send_dummy(conn);
|
||||
else
|
||||
rc = mgcp_udp_send(conn->end.rtp.fd, &conn->end.addr, conn->end.rtp_port,
|
||||
rtp_dummy_payload, sizeof(rtp_dummy_payload));
|
||||
|
||||
if (rc == -1)
|
||||
goto failed;
|
||||
|
@ -1138,7 +1154,7 @@ int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct osmo_sockaddr *addr
|
|||
* course unable to patch the payload type. A situation like this
|
||||
* should not occur if transcoding is consequently avoided. Until
|
||||
* we have transcoding support in osmo-mgw we can not resolve this. */
|
||||
if (is_rtp) {
|
||||
if (is_rtp && conn_dst->type != MGCP_RTP_IUUP) {
|
||||
rc = mgcp_patch_pt(conn_src, conn_dst, msg);
|
||||
if (rc < 0) {
|
||||
LOGPENDP(endp, DRTP, LOGL_DEBUG,
|
||||
|
@ -1185,7 +1201,9 @@ int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct osmo_sockaddr *addr
|
|||
mgcp_patch_and_count(endp, rtp_state, rtp_end,
|
||||
addr, msg);
|
||||
|
||||
if (amr_oa_bwe_convert_indicated(conn_dst->end.codec)) {
|
||||
if (mgcp_conn_rtp_is_iuup(conn_dst) || mgcp_conn_rtp_is_iuup(conn_src)) {
|
||||
/* the iuup code will correctly transform to the correct AMR mode */
|
||||
} else if (amr_oa_bwe_convert_indicated(conn_dst->end.codec)) {
|
||||
rc = amr_oa_bwe_convert(endp, msg,
|
||||
conn_dst->end.codec->param.amr_octet_aligned);
|
||||
if (rc < 0) {
|
||||
|
@ -1211,28 +1229,9 @@ int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct osmo_sockaddr *addr
|
|||
);
|
||||
|
||||
/* Forward a copy of the RTP data to a debug ip/port */
|
||||
forward_data(rtp_end->rtp.fd, &conn_src->tap_out,
|
||||
forward_data_tap(rtp_end->rtp.fd, &conn_src->tap_out,
|
||||
msg);
|
||||
|
||||
/* 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 (!rtp_state->patched_first_rtp_payload
|
||||
&& conn_src->conn->mode == MGCP_CONN_LOOPBACK) {
|
||||
uint8_t *data = msgb_data(msg) + 12;
|
||||
if (data[0] == 0xe0) {
|
||||
data[0] = 0xe4;
|
||||
data[1] = 0x00;
|
||||
data[2] = (0x09 << 2); /* Patch CRC Header to adapt to new header above */
|
||||
rtp_state->patched_first_rtp_payload = true;
|
||||
LOGPENDP(endp, DRTP, LOGL_DEBUG,
|
||||
"Patching over first two bytes"
|
||||
" to fake an IuUP Initialization Ack\n");
|
||||
}
|
||||
}
|
||||
|
||||
len = mgcp_udp_send(rtp_end->rtp.fd, &rtp_end->addr, rtp_end->rtp_port,
|
||||
(char *)msgb_data(msg), msgb_length(msg));
|
||||
|
||||
|
@ -1292,6 +1291,9 @@ int mgcp_dispatch_rtp_bridge_cb(struct msgb *msg)
|
|||
* destination connection is known the RTP packet is sent via
|
||||
* the destination connection. */
|
||||
|
||||
/* If source is IuUP, we need to handle state, forward it through specific bridge path: */
|
||||
if (mgcp_conn_rtp_is_iuup(conn_src) && mc->proto == MGCP_PROTO_RTP)
|
||||
return mgcp_conn_iuup_dispatch_rtp(msg);
|
||||
|
||||
/* Check if the connection is in loopback mode, if yes, just send the
|
||||
* incoming data back to the origin */
|
||||
|
@ -1507,7 +1509,7 @@ static int rtp_data_net(struct osmo_fd *fd, unsigned int what)
|
|||
/* FIXME: count RTP and RTCP separately, also count IuUP payload-less separately */
|
||||
|
||||
/* Forward a copy of the RTP data to a debug ip/port */
|
||||
forward_data(fd->fd, &conn_src->tap_in, msg);
|
||||
forward_data_tap(fd->fd, &conn_src->tap_in, msg);
|
||||
|
||||
rc = rx_rtp(msg);
|
||||
|
||||
|
|
|
@ -46,6 +46,7 @@
|
|||
#include <osmocom/mgcp/mgcp_sdp.h>
|
||||
#include <osmocom/mgcp/mgcp_codec.h>
|
||||
#include <osmocom/mgcp/mgcp_conn.h>
|
||||
#include <osmocom/mgcp/mgcp_iuup.h>
|
||||
|
||||
/* Contains the last successfully resolved endpoint name. This variable is used
|
||||
* for the unit-tests to verify that the endpoint was correctly resolved. */
|
||||
|
@ -147,7 +148,13 @@ static int setup_rtp_processing(struct mgcp_endpoint *endp,
|
|||
struct mgcp_conn_rtp *conn_dst = conn;
|
||||
struct mgcp_conn *_conn;
|
||||
|
||||
if (conn->type != MGCP_RTP_DEFAULT && !mgcp_conn_rtp_is_osmux(conn)) {
|
||||
switch (conn->type) {
|
||||
case MGCP_RTP_DEFAULT:
|
||||
case MGCP_OSMUX_BSC:
|
||||
case MGCP_OSMUX_BSC_NAT:
|
||||
case MGCP_RTP_IUUP:
|
||||
break;
|
||||
default:
|
||||
LOGPENDP(endp, DLMGCP, LOGL_NOTICE,
|
||||
"RTP-setup: Endpoint is not configured as RTP default, stopping here!\n");
|
||||
return 0;
|
||||
|
@ -1028,6 +1035,11 @@ mgcp_header_done:
|
|||
rate_ctr_inc(rate_ctr_group_get_ctr(rate_ctrs, MGCP_CRCX_FAIL_CODEC_NEGOTIATION));
|
||||
goto error2;
|
||||
}
|
||||
/* Upgrade the conn type RTP_DEFAULT->RTP_IUUP if needed based on requested codec: */
|
||||
/* TODO: "codec" probably needs to be moved from endp to conn */
|
||||
if (conn->type == MGCP_RTP_DEFAULT && strcmp(conn->end.codec->subtype_name, "VND.3GPP.IUFP") == 0) {
|
||||
rc = mgcp_conn_iuup_init(conn);
|
||||
}
|
||||
|
||||
conn->end.fmtp_extra = talloc_strdup(trunk->endpoints,
|
||||
trunk->audio_fmtp_extra);
|
||||
|
|
Loading…
Reference in New Issue