create libosmo-mgcp and osmo-mgw by copying legacy code
This a cosmetic commit, copying libosmo-legacy-mgcp to libosmo-mgcp and
osmo-bsc_mgcp to osmo-mgw 1:1 at first, to provide a basis for next patches
that highlight the changes from legacy to new code.
Until osmo-msc and osmo-bsc are adjusted to operate with the new code, we will
keep the legacy code alongside the new code. The legacy code might be dropped
later.
Change-Id: Idf54481754a1765bdb2d0d7033bc0d7dc2018024
diff --git a/include/osmocom/mgcp/mgcp_internal.h b/include/osmocom/mgcp/mgcp_internal.h
new file mode 100644
index 0000000..dcc75f1
--- /dev/null
+++ b/include/osmocom/mgcp/mgcp_internal.h
@@ -0,0 +1,337 @@
+/* MGCP Private Data */
+
+/*
+ * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009-2012 by On-Waves
+ * All Rights Reserved
+ *
+ * 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 <string.h>
+
+#include <osmocom/core/select.h>
+
+#define CI_UNUSED 0
+
+enum mgcp_trunk_type {
+ MGCP_TRUNK_VIRTUAL,
+ MGCP_TRUNK_E1,
+};
+
+struct mgcp_rtp_stream_state {
+ uint32_t ssrc;
+ uint16_t last_seq;
+ uint32_t last_timestamp;
+ uint32_t err_ts_counter;
+ int32_t last_tsdelta;
+ uint32_t last_arrival_time;
+};
+
+struct mgcp_rtp_state {
+ int initialized;
+ int patch_ssrc;
+
+ uint32_t orig_ssrc;
+
+ int seq_offset;
+
+ int32_t timestamp_offset;
+ uint32_t packet_duration;
+
+ struct mgcp_rtp_stream_state in_stream;
+ struct mgcp_rtp_stream_state out_stream;
+
+ /* jitter and packet loss calculation */
+ int stats_initialized;
+ uint16_t stats_base_seq;
+ uint16_t stats_max_seq;
+ uint32_t stats_ssrc;
+ 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 {
+ uint32_t rate;
+ int channels;
+ uint32_t frame_duration_num;
+ uint32_t frame_duration_den;
+
+ int payload_type;
+ char *audio_name;
+ char *subtype_name;
+};
+
+struct mgcp_rtp_end {
+ /* statistics */
+ unsigned int packets;
+ unsigned int octets;
+ unsigned int dropped_packets;
+ struct in_addr addr;
+
+ /* in network byte order */
+ int rtp_port, rtcp_port;
+
+ /* audio codec information */
+ struct mgcp_rtp_codec codec;
+ struct mgcp_rtp_codec alt_codec; /* TODO/XXX: make it generic */
+
+ /* per endpoint data */
+ int frames_per_packet;
+ uint32_t packet_duration_ms;
+ char *fmtp_extra;
+ int output_enabled;
+ int force_output_ptime;
+
+ /* RTP patching */
+ int force_constant_ssrc; /* -1: always, 0: don't, 1: once */
+ int force_aligned_timing;
+ void *rtp_process_data;
+
+ /*
+ * Each end has a socket...
+ */
+ struct osmo_fd rtp;
+ struct osmo_fd rtcp;
+
+ int local_port;
+ int local_alloc;
+};
+
+enum {
+ MGCP_TAP_BTS_IN,
+ MGCP_TAP_BTS_OUT,
+ MGCP_TAP_NET_IN,
+ MGCP_TAP_NET_OUT,
+
+ /* last element */
+ MGCP_TAP_COUNT
+};
+
+struct mgcp_rtp_tap {
+ int enabled;
+ struct sockaddr_in forward;
+};
+
+struct mgcp_lco {
+ char *string;
+ char *codec;
+ int pkt_period_min; /* time in ms */
+ int pkt_period_max; /* time in ms */
+};
+
+enum mgcp_type {
+ MGCP_RTP_DEFAULT = 0,
+ MGCP_RTP_TRANSCODED,
+ MGCP_OSMUX_BSC,
+ MGCP_OSMUX_BSC_NAT,
+};
+
+#include <osmocom/legacy_mgcp/osmux.h>
+
+struct mgcp_endpoint {
+ int allocated;
+ uint32_t ci;
+ char *callid;
+ struct mgcp_lco local_options;
+ int conn_mode;
+ int orig_mode;
+
+ /* backpointer */
+ struct mgcp_config *cfg;
+ struct mgcp_trunk_config *tcfg;
+
+ /* port status for bts/net */
+ struct mgcp_rtp_end bts_end;
+ struct mgcp_rtp_end net_end;
+
+ /*
+ * For transcoding we will send from the local_port
+ * of trans_bts and it will arrive at trans_net from
+ * where we will forward it to the network.
+ */
+ struct mgcp_rtp_end trans_bts;
+ struct mgcp_rtp_end trans_net;
+ enum mgcp_type type;
+
+ /* sequence bits */
+ struct mgcp_rtp_state net_state;
+ struct mgcp_rtp_state bts_state;
+
+ /* fields for re-transmission */
+ char *last_trans;
+ char *last_response;
+
+ /* tap for the endpoint */
+ struct mgcp_rtp_tap taps[MGCP_TAP_COUNT];
+
+ struct {
+ /* 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;
+ /* handle to unbatch messages */
+ struct osmux_out_handle out;
+ /* statistics */
+ struct {
+ uint32_t chunks;
+ uint32_t octets;
+ } stats;
+ } osmux;
+};
+
+#define for_each_line(line, save) \
+ for (line = strline_r(NULL, &save); line;\
+ line = strline_r(NULL, &save))
+
+static inline char *strline_r(char *str, char **saveptr)
+{
+ char *result;
+
+ if (str)
+ *saveptr = str;
+
+ result = *saveptr;
+
+ if (*saveptr != NULL) {
+ *saveptr = strpbrk(*saveptr, "\r\n");
+
+ if (*saveptr != NULL) {
+ char *eos = *saveptr;
+
+ if ((*saveptr)[0] == '\r' && (*saveptr)[1] == '\n')
+ (*saveptr)++;
+ (*saveptr)++;
+ if ((*saveptr)[0] == '\0')
+ *saveptr = NULL;
+
+ *eos = '\0';
+ }
+ }
+
+ return result;
+}
+
+
+
+#define ENDPOINT_NUMBER(endp) abs((int)(endp - endp->tcfg->endpoints))
+
+/**
+ * Internal structure while parsing a request
+ */
+struct mgcp_parse_data {
+ struct mgcp_config *cfg;
+ struct mgcp_endpoint *endp;
+ char *trans;
+ char *save;
+ int found;
+};
+
+int mgcp_send_dummy(struct mgcp_endpoint *endp);
+int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
+int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
+int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
+int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
+int mgcp_free_rtp_port(struct mgcp_rtp_end *end);
+
+/* For transcoding we need to manage an in and an output that are connected */
+static inline int endp_back_channel(int endpoint)
+{
+ return endpoint + 60;
+}
+
+struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int index);
+struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index);
+
+void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change,
+ struct mgcp_rtp_end *rtp);
+uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp,
+ struct mgcp_rtp_end *rtp);
+
+void mgcp_state_calc_loss(struct mgcp_rtp_state *s, struct mgcp_rtp_end *,
+ uint32_t *expected, int *loss);
+uint32_t mgcp_state_calc_jitter(struct mgcp_rtp_state *);
+
+/* payload processing default functions */
+int mgcp_rtp_processing_default(struct mgcp_endpoint *endp, struct mgcp_rtp_end *dst_end,
+ char *data, int *len, int buf_size);
+
+int mgcp_setup_rtp_processing_default(struct mgcp_endpoint *endp,
+ struct mgcp_rtp_end *dst_end,
+ struct mgcp_rtp_end *src_end);
+
+void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp,
+ int *payload_type,
+ const char**subtype_name,
+ const char**fmtp_extra);
+
+/* internal RTP Annex A counting */
+void mgcp_rtp_annex_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state,
+ const uint16_t seq, const int32_t transit,
+ const uint32_t ssrc);
+
+int mgcp_set_ip_tos(int fd, int tos);
+
+enum {
+ MGCP_DEST_NET = 0,
+ MGCP_DEST_BTS,
+};
+
+
+#define MGCP_DUMMY_LOAD 0x23
+
+
+/**
+ * SDP related information
+ */
+/* Assume audio frame length of 20ms */
+#define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20
+#define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000
+#define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20
+#define DEFAULT_RTP_AUDIO_DEFAULT_RATE 8000
+#define DEFAULT_RTP_AUDIO_DEFAULT_CHANNELS 1
+
+#define PTYPE_UNDEFINED (-1)
+int mgcp_parse_sdp_data(struct mgcp_endpoint *endp, struct mgcp_rtp_end *rtp, struct mgcp_parse_data *p);
+int mgcp_set_audio_info(void *ctx, struct mgcp_rtp_codec *codec,
+ int payload_type, const char *audio_name);
+
+
+/**
+ * Internal network related
+ */
+static inline const char *mgcp_net_src_addr(struct mgcp_endpoint *endp)
+{
+ if (endp->cfg->net_ports.bind_addr)
+ return endp->cfg->net_ports.bind_addr;
+ return endp->cfg->source_addr;
+}
+
+static inline const char *mgcp_bts_src_addr(struct mgcp_endpoint *endp)
+{
+ if (endp->cfg->bts_ports.bind_addr)
+ return endp->cfg->bts_ports.bind_addr;
+ return endp->cfg->source_addr;
+}
+
+int mgcp_msg_terminate_nul(struct msgb *msg);