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[osmo-bts PATCH 2/5] osmo-bts-sysmo/utils.c: Added a function for calculate the power transmitter
by Alvaro Neira Ayuso 28 Apr '14

28 Apr '14

From: Álvaro Neira Ayuso <anayuso(a)sysmocom.de> Signed-off-by: Alvaro Neira Ayuso <anayuso(a)sysmocom.de> --- src/osmo-bts-sysmo/oml.c | 4 ++-- src/osmo-bts-sysmo/utils.c | 11 +++++++++++ src/osmo-bts-sysmo/utils.h | 1 + 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/src/osmo-bts-sysmo/oml.c b/src/osmo-bts-sysmo/oml.c index 1543f85..4ebf664 100644 --- a/src/osmo-bts-sysmo/oml.c +++ b/src/osmo-bts-sysmo/oml.c @@ -323,7 +323,7 @@ static int trx_init(struct gsm_bts_trx *trx) dev_par->u16BcchArfcn = trx->bts->c0->arfcn; dev_par->u8NbTsc = trx->bts->bsic & 7; dev_par->fRxPowerLevel = fl1h->ul_power_target; - dev_par->fTxPowerLevel = trx->nominal_power - trx->max_power_red; + dev_par->fTxPowerLevel = sysmobts_get_power_trx(trx); LOGP(DL1C, LOGL_NOTICE, "Init TRX (ARFCN %u, TSC %u, RxPower % 2f dBm, " "TxPower % 2.2f dBm\n", dev_par->u16Arfcn, dev_par->u8NbTsc, dev_par->fRxPowerLevel, dev_par->fTxPowerLevel); @@ -1544,7 +1544,7 @@ int bts_model_apply_oml(struct gsm_bts *bts, struct msgb *msg, /* Did we go through MphInit yet? If yes fire and forget */ if (fl1h->hLayer1) - l1if_set_txpower(fl1h, trx->nominal_power - trx->max_power_red); + l1if_set_txpower(fl1h, sysmobts_get_power_trx(trx)); } /* FIXME: we actaully need to send a ACK or NACK for the OML message */ diff --git a/src/osmo-bts-sysmo/utils.c b/src/osmo-bts-sysmo/utils.c index f576eef..af1e5d2 100644 --- a/src/osmo-bts-sysmo/utils.c +++ b/src/osmo-bts-sysmo/utils.c @@ -136,3 +136,14 @@ int sysmobts_get_nominal_power(struct gsm_bts_trx *trx) } return -1; } + +int sysmobts_get_power_trx(struct gsm_bts_trx *trx) +{ + int power_transmitter = trx->nominal_power - trx->max_power_red; + power_transmitter -= trx->power_reduce; + + if (power_transmitter < 0) + power_transmitter = 0; + + return power_transmitter; +} diff --git a/src/osmo-bts-sysmo/utils.h b/src/osmo-bts-sysmo/utils.h index ff41437..aef774c 100644 --- a/src/osmo-bts-sysmo/utils.h +++ b/src/osmo-bts-sysmo/utils.h @@ -12,4 +12,5 @@ int sysmobts_select_femto_band(struct gsm_bts_trx *trx, uint16_t arfcn); int sysmobts_get_nominal_power(struct gsm_bts_trx *trx); +int sysmobts_get_power_trx(struct gsm_bts_trx *trx); #endif -- 1.7.10.4

1 0

[PATCH 1/5] sms: Kill the sms->sender and use addr/ton/npi throughout the code
by Holger Freyther 25 Apr '14

25 Apr '14

From: Holger Hans Peter Freyther <zecke(a)selfish.org> This is an incompatible database schema change. Store the type of the address in the database for both the sender and the receiver. Currently it is possible to use SMPP to store a SMS and the NPI and TON will be lost on the delivery of the SMS. The schema is changed to make the delivery always use the right NPI/TON. This patch is not ready for the master branch as there is no upgrade path for the HLR yet. --- openbsc/include/openbsc/gsm_data.h | 1 - openbsc/src/libmsc/db.c | 62 +++++++++++++++++++++++--------------- openbsc/src/libmsc/gsm_04_11.c | 9 ++---- openbsc/src/libmsc/smpp_openbsc.c | 5 ++- 4 files changed, 42 insertions(+), 35 deletions(-) diff --git a/openbsc/include/openbsc/gsm_data.h b/openbsc/include/openbsc/gsm_data.h index 8f24d4f..4338cd6 100644 --- a/openbsc/include/openbsc/gsm_data.h +++ b/openbsc/include/openbsc/gsm_data.h @@ -304,7 +304,6 @@ struct gsm_sms_addr { struct gsm_sms { unsigned long long id; - struct gsm_subscriber *sender; struct gsm_subscriber *receiver; struct gsm_sms_addr src, dst; enum gsm_sms_source_id source; diff --git a/openbsc/src/libmsc/db.c b/openbsc/src/libmsc/db.c index bfa4e75..df26b04 100644 --- a/openbsc/src/libmsc/db.c +++ b/openbsc/src/libmsc/db.c @@ -95,7 +95,6 @@ static char *create_stmts[] = { "id INTEGER PRIMARY KEY AUTOINCREMENT, " "created TIMESTAMP NOT NULL, " "sent TIMESTAMP, " - "sender_id INTEGER NOT NULL, " "receiver_id INTEGER NOT NULL, " "deliver_attempts INTEGER NOT NULL DEFAULT 0, " /* data directly copied/derived from SMS */ @@ -105,7 +104,12 @@ static char *create_stmts[] = { "protocol_id INTEGER NOT NULL, " "data_coding_scheme INTEGER NOT NULL, " "ud_hdr_ind INTEGER NOT NULL, " - "dest_addr TEXT, " + "src_addr TEXT NOT NULL, " + "src_ton INTEGER NOT NULL, " + "src_npi INTEGER NOT NULL, " + "dest_addr TEXT NOT NULL, " + "dest_ton INTEGER NOT NULL, " + "dest_npi INTEGER NOT NULL, " "user_data BLOB, " /* TP-UD */ /* additional data, interpreted from SMS */ "header BLOB, " /* UD Header */ @@ -1214,7 +1218,7 @@ int db_subscriber_assoc_imei(struct gsm_subscriber *subscriber, char imei[GSM_IM int db_sms_store(struct gsm_sms *sms) { dbi_result result; - char *q_text, *q_daddr; + char *q_text, *q_daddr, *q_saddr; unsigned char *q_udata; char *validity_timestamp = "2222-2-2"; @@ -1222,25 +1226,35 @@ int db_sms_store(struct gsm_sms *sms) dbi_conn_quote_string_copy(conn, (char *)sms->text, &q_text); dbi_conn_quote_string_copy(conn, (char *)sms->dst.addr, &q_daddr); + dbi_conn_quote_string_copy(conn, (char *)sms->src.addr, &q_saddr); dbi_conn_quote_binary_copy(conn, sms->user_data, sms->user_data_len, &q_udata); + /* FIXME: correct validity period */ result = dbi_conn_queryf(conn, "INSERT INTO SMS " - "(created, sender_id, receiver_id, valid_until, " + "(created, receiver_id, valid_until, " "reply_path_req, status_rep_req, protocol_id, " - "data_coding_scheme, ud_hdr_ind, dest_addr, " - "user_data, text) VALUES " - "(datetime('now'), %llu, %llu, %u, " - "%u, %u, %u, %u, %u, %s, %s, %s)", - sms->sender->id, + "data_coding_scheme, ud_hdr_ind, " + "user_data, text, " + "dest_addr, dest_ton, dest_npi, " + "src_addr, src_ton, src_npi) VALUES " + "(datetime('now'), %llu, %u, " + "%u, %u, %u, " + "%u, %u, " + "%s, %s, " + "%s, %u, %u, " + "%s, %u, %u)", sms->receiver ? sms->receiver->id : 0, validity_timestamp, sms->reply_path_req, sms->status_rep_req, sms->protocol_id, sms->data_coding_scheme, sms->ud_hdr_ind, - q_daddr, q_udata, q_text); + q_udata, q_text, + q_daddr, sms->dst.ton, sms->dst.npi, + q_saddr, sms->src.ton, sms->src.npi); free(q_text); - free(q_daddr); free(q_udata); + free(q_daddr); + free(q_saddr); if (!result) return -EIO; @@ -1252,8 +1266,8 @@ int db_sms_store(struct gsm_sms *sms) static struct gsm_sms *sms_from_result(struct gsm_network *net, dbi_result result) { struct gsm_sms *sms = sms_alloc(); - long long unsigned int sender_id, receiver_id; - const char *text, *daddr; + long long unsigned int receiver_id; + const char *text, *daddr, *saddr; const unsigned char *user_data; if (!sms) @@ -1261,18 +1275,6 @@ static struct gsm_sms *sms_from_result(struct gsm_network *net, dbi_result resul sms->id = dbi_result_get_ulonglong(result, "id"); - sender_id = dbi_result_get_ulonglong(result, "sender_id"); - sms->sender = subscr_get_by_id(net, sender_id); - if (!sms->sender) { - LOGP(DLSMS, LOGL_ERROR, - "Failed to find sender(%llu) for id(%llu)\n", - sender_id, sms->id); - sms_free(sms); - return NULL; - } - - strncpy(sms->src.addr, sms->sender->extension, sizeof(sms->src.addr)-1); - receiver_id = dbi_result_get_ulonglong(result, "receiver_id"); sms->receiver = subscr_get_by_id(net, receiver_id); if (!sms->receiver) { @@ -1293,12 +1295,22 @@ static struct gsm_sms *sms_from_result(struct gsm_network *net, dbi_result resul "data_coding_scheme"); /* sms->msg_ref is temporary and not stored in DB */ + sms->dst.npi = dbi_result_get_uint(result, "dest_npi"); + sms->dst.ton = dbi_result_get_uint(result, "dest_ton"); daddr = dbi_result_get_string(result, "dest_addr"); if (daddr) { strncpy(sms->dst.addr, daddr, sizeof(sms->dst.addr)); sms->dst.addr[sizeof(sms->dst.addr)-1] = '\0'; } + sms->src.npi = dbi_result_get_uint(result, "src_npi"); + sms->src.ton = dbi_result_get_uint(result, "src_ton"); + saddr = dbi_result_get_string(result, "src_addr"); + if (saddr) { + strncpy(sms->src.addr, saddr, sizeof(sms->src.addr)); + sms->src.addr[sizeof(sms->src.addr)-1] = '\0'; + } + sms->user_data_len = dbi_result_get_field_length(result, "user_data"); user_data = dbi_result_get_binary(result, "user_data"); if (sms->user_data_len > sizeof(sms->user_data)) diff --git a/openbsc/src/libmsc/gsm_04_11.c b/openbsc/src/libmsc/gsm_04_11.c index 5f10759..b2100d8 100644 --- a/openbsc/src/libmsc/gsm_04_11.c +++ b/openbsc/src/libmsc/gsm_04_11.c @@ -73,8 +73,6 @@ struct gsm_sms *sms_alloc(void) void sms_free(struct gsm_sms *sms) { /* drop references to subscriber structure */ - if (sms->sender) - subscr_put(sms->sender); if (sms->receiver) subscr_put(sms->receiver); #ifdef BUILD_SMPP @@ -97,8 +95,7 @@ struct gsm_sms *sms_from_text(struct gsm_subscriber *receiver, sms->receiver = subscr_get(receiver); strncpy(sms->text, text, sizeof(sms->text)-1); - sms->sender = subscr_get(sender); - strncpy(sms->src.addr, sms->sender->extension, sizeof(sms->src.addr)-1); + strncpy(sms->src.addr, sender->extension, sizeof(sms->src.addr)-1); sms->reply_path_req = 0; sms->status_rep_req = 0; sms->ud_hdr_ind = 0; @@ -378,12 +375,12 @@ static int gsm340_rx_tpdu(struct gsm_subscriber_connection *conn, struct msgb *m } } - gsms->sender = subscr_get(conn->subscr); + strncpy(gsms->src.addr, conn->subscr->extension, sizeof(gsms->src.addr)-1); LOGP(DLSMS, LOGL_INFO, "RX SMS: Sender: %s, MTI: 0x%02x, VPF: 0x%02x, " "MR: 0x%02x PID: 0x%02x, DCS: 0x%02x, DA: %s, " "UserDataLength: 0x%02x, UserData: \"%s\"\n", - subscr_name(gsms->sender), sms_mti, sms_vpf, gsms->msg_ref, + subscr_name(conn->subscr), sms_mti, sms_vpf, gsms->msg_ref, gsms->protocol_id, gsms->data_coding_scheme, gsms->dst.addr, gsms->user_data_len, sms_alphabet == DCS_7BIT_DEFAULT ? gsms->text : diff --git a/openbsc/src/libmsc/smpp_openbsc.c b/openbsc/src/libmsc/smpp_openbsc.c index ab558ce..ec541c2 100644 --- a/openbsc/src/libmsc/smpp_openbsc.c +++ b/openbsc/src/libmsc/smpp_openbsc.c @@ -133,7 +133,6 @@ static int submit_to_sms(struct gsm_sms **psms, struct gsm_network *net, strncpy(sms->dst.addr, dest->extension, sizeof(sms->dst.addr)-1); /* fill in the source address */ - sms->sender = subscr_get_by_id(net, 1); sms->src.ton = submit->source_addr_ton; sms->src.npi = submit->source_addr_npi; strncpy(sms->src.addr, (char *)submit->source_addr, sizeof(sms->src.addr)-1); @@ -475,13 +474,13 @@ static int deliver_to_esme(struct osmo_esme *esme, struct gsm_sms *sms, deliver.source_addr_npi = NPI_Land_Mobile_E212; snprintf((char *)deliver.source_addr, sizeof(deliver.source_addr), "%s", - sms->sender->imsi); + conn->subscr->imsi); } else { deliver.source_addr_ton = TON_Network_Specific; deliver.source_addr_npi = NPI_ISDN_E163_E164; snprintf((char *)deliver.source_addr, sizeof(deliver.source_addr), "%s", - sms->sender->extension); + conn->subscr->extension); } deliver.dest_addr_ton = sms->dst.ton; -- 1.9.1

3 6

[PATCH] Move rtp_proxy.c from libtrau to libmsc
by Andreas Eversberg 18 Apr '14

18 Apr '14

In order to free RTP socket when lchan_free() or lchan_reset() is called, a signal is used between libbsc and rtp_proxy. --- openbsc/include/openbsc/signal.h | 1 + openbsc/src/libbsc/chan_alloc.c | 14 +- openbsc/src/libmsc/Makefile.am | 3 +- openbsc/src/libmsc/rtp_proxy.c | 847 +++++++++++++++++++++++++++++++++++++++ openbsc/src/libtrau/Makefile.am | 2 +- openbsc/src/libtrau/rtp_proxy.c | 816 ------------------------------------- 6 files changed, 863 insertions(+), 820 deletions(-) create mode 100644 openbsc/src/libmsc/rtp_proxy.c delete mode 100644 openbsc/src/libtrau/rtp_proxy.c diff --git a/openbsc/include/openbsc/signal.h b/openbsc/include/openbsc/signal.h index 39319f1..4e7a71a 100644 --- a/openbsc/include/openbsc/signal.h +++ b/openbsc/include/openbsc/signal.h @@ -99,6 +99,7 @@ enum signal_lchan { S_LCHAN_HANDOVER_FAIL, /* 04.08 Handover Failed */ S_LCHAN_HANDOVER_DETECT, /* 08.58 Handover Detect */ S_LCHAN_MEAS_REP, /* 08.58 Measurement Report */ + S_LCHAN_RTP_SOCKET_FREE, }; /* SS_CHALLOC signals */ diff --git a/openbsc/src/libbsc/chan_alloc.c b/openbsc/src/libbsc/chan_alloc.c index 9b74329..7bf6477 100644 --- a/openbsc/src/libbsc/chan_alloc.c +++ b/openbsc/src/libbsc/chan_alloc.c @@ -311,9 +311,13 @@ void lchan_free(struct gsm_lchan *lchan) } if (lchan->abis_ip.rtp_socket) { + struct lchan_signal_data sig; + LOGP(DRLL, LOGL_ERROR, "%s RTP Proxy Socket remained open.\n", gsm_lchan_name(lchan)); - rtp_socket_free(lchan->abis_ip.rtp_socket); + sig.lchan = lchan; + sig.mr = NULL; + osmo_signal_dispatch(SS_LCHAN, S_LCHAN_RTP_SOCKET_FREE, &sig); lchan->abis_ip.rtp_socket = NULL; } @@ -369,7 +373,13 @@ void lchan_reset(struct gsm_lchan *lchan) lchan->state = LCHAN_S_NONE; if (lchan->abis_ip.rtp_socket) { - rtp_socket_free(lchan->abis_ip.rtp_socket); + struct lchan_signal_data sig; + + LOGP(DRLL, LOGL_ERROR, "%s RTP Proxy Socket remained open.\n", + gsm_lchan_name(lchan)); + sig.lchan = lchan; + sig.mr = NULL; + osmo_signal_dispatch(SS_LCHAN, S_LCHAN_RTP_SOCKET_FREE, &sig); lchan->abis_ip.rtp_socket = NULL; } } diff --git a/openbsc/src/libmsc/Makefile.am b/openbsc/src/libmsc/Makefile.am index 24db2c2..4d44a62 100644 --- a/openbsc/src/libmsc/Makefile.am +++ b/openbsc/src/libmsc/Makefile.am @@ -17,7 +17,8 @@ libmsc_a_SOURCES = auth.c \ ussd.c \ vty_interface_layer3.c \ transaction.c \ - osmo_msc.c ctrl_commands.c + osmo_msc.c ctrl_commands.c \ + rtp_proxy.c if BUILD_SMPP noinst_HEADERS = smpp_smsc.h diff --git a/openbsc/src/libmsc/rtp_proxy.c b/openbsc/src/libmsc/rtp_proxy.c new file mode 100644 index 0000000..a950a72 --- /dev/null +++ b/openbsc/src/libmsc/rtp_proxy.c @@ -0,0 +1,847 @@ +/* RTP proxy handling for ip.access nanoBTS */ + +/* (C) 2009-2013 by Harald Welte <laforge(a)gnumonks.org> + * 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/>. + * + */ + +#include <errno.h> +#include <unistd.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <sys/time.h> /* gettimeofday() */ +#include <unistd.h> /* get..() */ +#include <time.h> /* clock() */ +#include <sys/utsname.h> /* uname() */ + +#include <osmocom/core/talloc.h> +#include <openbsc/gsm_data.h> +#include <osmocom/core/msgb.h> +#include <osmocom/core/select.h> +#include <openbsc/debug.h> +#include <openbsc/rtp_proxy.h> +#include <openbsc/mncc.h> +#include <openbsc/trau_upqueue.h> +#include <openbsc/signal.h> + +/* attempt to determine byte order */ +#include <sys/param.h> +#include <limits.h> + +#ifndef __BYTE_ORDER +# ifdef __APPLE__ +# define __BYTE_ORDER __DARWIN_BYTE_ORDER +# define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN +# define __BIG_ENDIAN __DARWIN_BIG_ENDIAN +# else +# error "__BYTE_ORDER should be defined by someone" +# endif +#endif + +static LLIST_HEAD(rtp_sockets); + +/* should we mangle the CNAME inside SDES of RTCP packets? We disable + * this by default, as it seems to be not needed */ +static int mangle_rtcp_cname = 0; + +enum rtp_bfd_priv { + RTP_PRIV_NONE, + RTP_PRIV_RTP, + RTP_PRIV_RTCP +}; + +#define RTP_ALLOC_SIZE 1500 + +/* according to RFC 1889 */ +struct rtcp_hdr { + uint8_t byte0; + uint8_t type; + uint16_t length; +} __attribute__((packed)); + +#define RTCP_TYPE_SDES 202 + +#define RTCP_IE_CNAME 1 + +/* according to RFC 3550 */ +struct rtp_hdr { +#if __BYTE_ORDER == __LITTLE_ENDIAN + uint8_t csrc_count:4, + extension:1, + padding:1, + version:2; + uint8_t payload_type:7, + marker:1; +#elif __BYTE_ORDER == __BIG_ENDIAN + uint8_t version:2, + padding:1, + extension:1, + csrc_count:4; + uint8_t marker:1, + payload_type:7; +#endif + uint16_t sequence; + uint32_t timestamp; + uint32_t ssrc; +} __attribute__((packed)); + +struct rtp_x_hdr { + uint16_t by_profile; + uint16_t length; +} __attribute__((packed)); + +#define RTP_VERSION 2 + +/* decode an rtp frame and create a new buffer with payload */ +static int rtp_decode(struct msgb *msg, uint32_t callref, struct msgb **data) +{ + struct msgb *new_msg; + struct gsm_data_frame *frame; + struct rtp_hdr *rtph = (struct rtp_hdr *)msg->data; + struct rtp_x_hdr *rtpxh; + uint8_t *payload; + int payload_len; + int msg_type; + int x_len; + + if (msg->len < 12) { + DEBUGPC(DLMUX, "received RTP frame too short (len = %d)\n", + msg->len); + return -EINVAL; + } + if (rtph->version != RTP_VERSION) { + DEBUGPC(DLMUX, "received RTP version %d not supported.\n", + rtph->version); + return -EINVAL; + } + payload = msg->data + sizeof(struct rtp_hdr) + (rtph->csrc_count << 2); + payload_len = msg->len - sizeof(struct rtp_hdr) - (rtph->csrc_count << 2); + if (payload_len < 0) { + DEBUGPC(DLMUX, "received RTP frame too short (len = %d, " + "csrc count = %d)\n", msg->len, rtph->csrc_count); + return -EINVAL; + } + if (rtph->extension) { + if (payload_len < sizeof(struct rtp_x_hdr)) { + DEBUGPC(DLMUX, "received RTP frame too short for " + "extension header\n"); + return -EINVAL; + } + rtpxh = (struct rtp_x_hdr *)payload; + x_len = ntohs(rtpxh->length) * 4 + sizeof(struct rtp_x_hdr); + payload += x_len; + payload_len -= x_len; + if (payload_len < 0) { + DEBUGPC(DLMUX, "received RTP frame too short, " + "extension header exceeds frame length\n"); + return -EINVAL; + } + } + if (rtph->padding) { + if (payload_len < 1) { + DEBUGPC(DLMUX, "received RTP frame too short for " + "padding length\n"); + return -EINVAL; + } + payload_len -= payload[payload_len - 1]; + if (payload_len < 0) { + DEBUGPC(DLMUX, "received RTP frame with padding " + "greater than payload\n"); + return -EINVAL; + } + } + + switch (rtph->payload_type) { + case RTP_PT_GSM_FULL: + msg_type = GSM_TCHF_FRAME; + if (payload_len != RTP_LEN_GSM_FULL) { + DEBUGPC(DLMUX, "received RTP full rate frame with " + "payload length != %d (len = %d)\n", + RTP_LEN_GSM_FULL, payload_len); + return -EINVAL; + } + break; + case RTP_PT_GSM_EFR: + msg_type = GSM_TCHF_FRAME_EFR; + if (payload_len != RTP_LEN_GSM_EFR) { + DEBUGPC(DLMUX, "received RTP extended full rate frame " + "with payload length != %d (len = %d)\n", + RTP_LEN_GSM_EFR, payload_len); + return -EINVAL; + } + break; + case RTP_PT_GSM_HALF: + msg_type = GSM_TCHH_FRAME; + if (payload_len != RTP_LEN_GSM_HALF) { + DEBUGPC(DLMUX, "received RTP half rate frame with " + "payload length != %d (len = %d)\n", + RTP_LEN_GSM_HALF, payload_len); + return -EINVAL; + } + break; + case RTP_PT_AMR: + break; + default: + DEBUGPC(DLMUX, "received RTP frame with unknown payload " + "type %d\n", rtph->payload_type); + return -EINVAL; + } + + if (rtph->payload_type == RTP_PT_AMR) { + new_msg = msgb_alloc(sizeof(struct gsm_data_frame) + 1 + + payload_len, "GSM-DATA"); + } else { + new_msg = msgb_alloc(sizeof(struct gsm_data_frame) + + payload_len, "GSM-DATA"); + } + if (!new_msg) + return -ENOMEM; + frame = (struct gsm_data_frame *)(new_msg->data); + frame->msg_type = msg_type; + frame->callref = callref; + if (rtph->payload_type == RTP_PT_AMR) { + frame->data[0] = payload_len; + msgb_put(new_msg, sizeof(struct gsm_data_frame) + 1 + + payload_len); + memcpy(frame->data + 1, payload, payload_len); + } else { + msgb_put(new_msg, sizeof(struct gsm_data_frame) + payload_len); + memcpy(frame->data, payload, payload_len); + } + + *data = new_msg; + return 0; +} + +/* "to - from" */ +static void tv_difference(struct timeval *diff, const struct timeval *from, + const struct timeval *__to) +{ + struct timeval _to = *__to, *to = &_to; + + if (to->tv_usec < from->tv_usec) { + to->tv_sec -= 1; + to->tv_usec += 1000000; + } + + diff->tv_usec = to->tv_usec - from->tv_usec; + diff->tv_sec = to->tv_sec - from->tv_sec; +} + +/*! \brief encode and send a rtp frame + * \param[in] rs RTP socket through which we shall send + * \param[in] frame GSM RTP frame to be sent + */ +int rtp_send_frame(struct rtp_socket *rs, struct gsm_data_frame *frame) +{ + struct rtp_sub_socket *rss = &rs->rtp; + struct msgb *msg; + struct rtp_hdr *rtph; + int payload_type; + int payload_len; + int duration; /* in samples */ + int is_bfi = 0; + + if (rs->tx_action != RTP_SEND_DOWNSTREAM) { + /* initialize sequences */ + rs->tx_action = RTP_SEND_DOWNSTREAM; + rs->transmit.ssrc = rand(); + rs->transmit.sequence = random(); + rs->transmit.timestamp = random(); + } + + switch (frame->msg_type) { + case GSM_TCHF_FRAME: + payload_type = RTP_PT_GSM_FULL; + payload_len = RTP_LEN_GSM_FULL; + duration = RTP_GSM_DURATION; + break; + case GSM_TCHF_FRAME_EFR: + payload_type = RTP_PT_GSM_EFR; + payload_len = RTP_LEN_GSM_EFR; + duration = RTP_GSM_DURATION; + break; + case GSM_TCHH_FRAME: + payload_type = RTP_PT_GSM_HALF; + payload_len = RTP_LEN_GSM_HALF; + duration = RTP_GSM_DURATION; + break; + case GSM_TCH_FRAME_AMR: + payload_type = RTP_PT_AMR; + payload_len = frame->data[0]; + duration = RTP_GSM_DURATION; + break; + case GSM_BAD_FRAME: + payload_type = 0; + payload_len = 0; + duration = RTP_GSM_DURATION; + is_bfi = 1; + break; + default: + DEBUGPC(DLMUX, "unsupported message type %d\n", + frame->msg_type); + return -EINVAL; + } + + { + struct timeval tv, tv_diff; + long int usec_diff, frame_diff; + + gettimeofday(&tv, NULL); + tv_difference(&tv_diff, &rs->transmit.last_tv, &tv); + rs->transmit.last_tv = tv; + + usec_diff = tv_diff.tv_sec * 1000000 + tv_diff.tv_usec; + frame_diff = (usec_diff / 20000); + + if (abs(frame_diff) > 1) { + long int frame_diff_excess = frame_diff - 1; + + LOGP(DLMUX, LOGL_NOTICE, + "Correcting frame difference of %ld frames\n", frame_diff_excess); + rs->transmit.sequence += frame_diff_excess; + rs->transmit.timestamp += frame_diff_excess * duration; + } + } + + if (is_bfi) { + /* In case of a bad frame, just count and drop packt. */ + rs->transmit.timestamp += duration; + rs->transmit.sequence++; + return 0; + } + + msg = msgb_alloc(sizeof(struct rtp_hdr) + payload_len, "RTP-GSM-FULL"); + if (!msg) + return -ENOMEM; + rtph = (struct rtp_hdr *)msg->data; + rtph->version = RTP_VERSION; + rtph->padding = 0; + rtph->extension = 0; + rtph->csrc_count = 0; + rtph->marker = 0; + rtph->payload_type = payload_type; + rtph->sequence = htons(rs->transmit.sequence++); + rtph->timestamp = htonl(rs->transmit.timestamp); + rs->transmit.timestamp += duration; + rtph->ssrc = htonl(rs->transmit.ssrc); + if (frame->msg_type == GSM_TCH_FRAME_AMR) { + memcpy(msg->data + sizeof(struct rtp_hdr), frame->data + 1, + payload_len); + } else { + memcpy(msg->data + sizeof(struct rtp_hdr), frame->data, + payload_len); + } + msgb_put(msg, sizeof(struct rtp_hdr) + payload_len); + msgb_enqueue(&rss->tx_queue, msg); + rss->bfd.when |= BSC_FD_WRITE; + + return 0; +} + +/* iterate over all chunks in one RTCP message, look for CNAME IEs and + * replace all of those with 'new_cname' */ +static int rtcp_sdes_cname_mangle(struct msgb *msg, struct rtcp_hdr *rh, + uint16_t *rtcp_len, const char *new_cname) +{ + uint8_t *rtcp_end; + uint8_t *cur = (uint8_t *) rh; + uint8_t tag, len = 0; + + rtcp_end = cur + *rtcp_len; + /* move cur to end of RTP header */ + cur += sizeof(*rh); + + /* iterate over Chunks */ + while (cur+4 < rtcp_end) { + /* skip four bytes SSRC/CSRC */ + cur += 4; + + /* iterate over IE's inside the chunk */ + while (cur+1 < rtcp_end) { + tag = *cur++; + if (tag == 0) { + /* end of chunk, skip additional zero */ + while (*cur++ == 0) { } + break; + } + len = *cur++; + + if (tag == RTCP_IE_CNAME) { + /* we've found the CNAME, lets mangle it */ + if (len < strlen(new_cname)) { + /* we need to make more space */ + int increase = strlen(new_cname) - len; + + msgb_push(msg, increase); + memmove(cur+len+increase, cur+len, + rtcp_end - (cur+len)); + /* FIXME: we have to respect RTCP + * padding/alignment rules! */ + len += increase; + *(cur-1) += increase; + rtcp_end += increase; + *rtcp_len += increase; + } + /* copy new CNAME into message */ + memcpy(cur, new_cname, strlen(new_cname)); + /* FIXME: zero the padding in case new CNAME + * is smaller than old one !!! */ + } + cur += len; + } + } + + return 0; +} + +static int rtcp_mangle(struct msgb *msg, struct rtp_socket *rs) +{ + struct rtp_sub_socket *rss = &rs->rtcp; + struct rtcp_hdr *rtph; + uint16_t old_len; + int rc; + + if (!mangle_rtcp_cname) + return 0; + + printf("RTCP\n"); + /* iterate over list of RTCP messages */ + rtph = (struct rtcp_hdr *)msg->data; + while ((void *)rtph + sizeof(*rtph) <= (void *)msg->data + msg->len) { + old_len = (ntohs(rtph->length) + 1) * 4; + if ((void *)rtph + old_len > (void *)msg->data + msg->len) { + DEBUGPC(DLMUX, "received RTCP packet too short for " + "length element\n"); + return -EINVAL; + } + if (rtph->type == RTCP_TYPE_SDES) { + char new_cname[255]; + strncpy(new_cname, inet_ntoa(rss->sin_local.sin_addr), + sizeof(new_cname)); + new_cname[sizeof(new_cname)-1] = '\0'; + rc = rtcp_sdes_cname_mangle(msg, rtph, &old_len, + new_cname); + if (rc < 0) + return rc; + } + rtph = (void *)rtph + old_len; + } + + return 0; +} + +/* read from incoming RTP/RTCP socket */ +static int rtp_socket_read(struct rtp_socket *rs, struct rtp_sub_socket *rss) +{ + int rc; + struct msgb *msg = msgb_alloc(RTP_ALLOC_SIZE, "RTP/RTCP"); + struct msgb *new_msg; + struct rtp_sub_socket *other_rss; + + if (!msg) + return -ENOMEM; + + rc = read(rss->bfd.fd, msg->data, RTP_ALLOC_SIZE); + if (rc <= 0) { + rss->bfd.when &= ~BSC_FD_READ; + return rc; + } + + msgb_put(msg, rc); + + switch (rs->rx_action) { + case RTP_PROXY: + if (!rs->proxy.other_sock) { + rc = -EIO; + goto out_free; + } + if (rss->bfd.priv_nr == RTP_PRIV_RTP) + other_rss = &rs->proxy.other_sock->rtp; + else if (rss->bfd.priv_nr == RTP_PRIV_RTCP) { + other_rss = &rs->proxy.other_sock->rtcp; + /* modify RTCP SDES CNAME */ + rc = rtcp_mangle(msg, rs); + if (rc < 0) + goto out_free; + } else { + rc = -EINVAL; + goto out_free; + } + msgb_enqueue(&other_rss->tx_queue, msg); + other_rss->bfd.when |= BSC_FD_WRITE; + break; + + case RTP_RECV_UPSTREAM: + if (!rs->receive.callref || !rs->receive.net) { + rc = -EIO; + goto out_free; + } + if (rss->bfd.priv_nr == RTP_PRIV_RTCP) { + if (!mangle_rtcp_cname) { + msgb_free(msg); + break; + } + /* modify RTCP SDES CNAME */ + rc = rtcp_mangle(msg, rs); + if (rc < 0) + goto out_free; + msgb_enqueue(&rss->tx_queue, msg); + rss->bfd.when |= BSC_FD_WRITE; + break; + } + if (rss->bfd.priv_nr != RTP_PRIV_RTP) { + rc = -EINVAL; + goto out_free; + } + rc = rtp_decode(msg, rs->receive.callref, &new_msg); + if (rc < 0) + goto out_free; + msgb_free(msg); + trau_tx_to_mncc(rs->receive.net, new_msg); + break; + + case RTP_NONE: /* if socket exists, but disabled by app */ + msgb_free(msg); + break; + } + + return 0; + +out_free: + msgb_free(msg); + return rc; +} + +/* \brief write from tx_queue to RTP/RTCP socket */ +static int rtp_socket_write(struct rtp_socket *rs, struct rtp_sub_socket *rss) +{ + struct msgb *msg; + int written; + + msg = msgb_dequeue(&rss->tx_queue); + if (!msg) { + rss->bfd.when &= ~BSC_FD_WRITE; + return 0; + } + + written = write(rss->bfd.fd, msg->data, msg->len); + if (written < msg->len) { + LOGP(DLMIB, LOGL_ERROR, "short write"); + msgb_free(msg); + return -EIO; + } + + msgb_free(msg); + + return 0; +} + + +/*! \brief callback for the select.c:bfd_* layer */ +static int rtp_bfd_cb(struct osmo_fd *bfd, unsigned int flags) +{ + struct rtp_socket *rs = bfd->data; + struct rtp_sub_socket *rss; + + switch (bfd->priv_nr) { + case RTP_PRIV_RTP: + rss = &rs->rtp; + break; + case RTP_PRIV_RTCP: + rss = &rs->rtcp; + break; + default: + return -EINVAL; + } + + if (flags & BSC_FD_READ) + rtp_socket_read(rs, rss); + + if (flags & BSC_FD_WRITE) + rtp_socket_write(rs, rss); + + return 0; +} + +/*! \brief initialize one rtp sub-socket */ +static void init_rss(struct rtp_sub_socket *rss, + struct rtp_socket *rs, int fd, int priv_nr) +{ + /* initialize bfd */ + rss->bfd.fd = fd; + rss->bfd.data = rs; + rss->bfd.priv_nr = priv_nr; + rss->bfd.cb = rtp_bfd_cb; +} + +/*! \brief create a new RTP/RTCP socket and bind it */ +struct rtp_socket *rtp_socket_create(void) +{ + int rc; + struct rtp_socket *rs; + + DEBUGP(DLMUX, "rtp_socket_create(): "); + + rs = talloc_zero(tall_bsc_ctx, struct rtp_socket); + if (!rs) + return NULL; + + INIT_LLIST_HEAD(&rs->rtp.tx_queue); + INIT_LLIST_HEAD(&rs->rtcp.tx_queue); + + rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (rc < 0) + goto out_free; + + init_rss(&rs->rtp, rs, rc, RTP_PRIV_RTP); + rc = osmo_fd_register(&rs->rtp.bfd); + if (rc < 0) + goto out_rtp_socket; + + rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (rc < 0) + goto out_rtp_bfd; + + init_rss(&rs->rtcp, rs, rc, RTP_PRIV_RTCP); + rc = osmo_fd_register(&rs->rtcp.bfd); + if (rc < 0) + goto out_rtcp_socket; + + DEBUGPC(DLMUX, "success\n"); + + rc = rtp_socket_bind(rs, INADDR_ANY); + if (rc < 0) + goto out_rtcp_bfd; + + return rs; + +out_rtcp_bfd: + osmo_fd_unregister(&rs->rtcp.bfd); +out_rtcp_socket: + close(rs->rtcp.bfd.fd); +out_rtp_bfd: + osmo_fd_unregister(&rs->rtp.bfd); +out_rtp_socket: + close(rs->rtp.bfd.fd); +out_free: + talloc_free(rs); + DEBUGPC(DLMUX, "failed\n"); + return NULL; +} + +static int rtp_sub_socket_bind(struct rtp_sub_socket *rss, uint32_t ip, + uint16_t port) +{ + int rc; + socklen_t alen = sizeof(rss->sin_local); + + rss->sin_local.sin_family = AF_INET; + rss->sin_local.sin_addr.s_addr = htonl(ip); + rss->sin_local.sin_port = htons(port); + rss->bfd.when |= BSC_FD_READ; + + rc = bind(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, + sizeof(rss->sin_local)); + if (rc < 0) + return rc; + + /* retrieve the address we actually bound to, in case we + * passed INADDR_ANY as IP address */ + return getsockname(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, + &alen); +} + +#define RTP_PORT_BASE 30000 +static unsigned int next_udp_port = RTP_PORT_BASE; + +/*! \brief bind a RTP socket to a specific local address + * \param[in] rs RTP socket to be bound + * \param[in] ip local IP address to which socket is to be bound + */ +int rtp_socket_bind(struct rtp_socket *rs, uint32_t ip) +{ + int rc = -EIO; + struct in_addr ia; + + ia.s_addr = htonl(ip); + DEBUGP(DLMUX, "rtp_socket_bind(rs=%p, IP=%s): ", rs, + inet_ntoa(ia)); + + /* try to bind to a consecutive pair of ports */ + for (next_udp_port = next_udp_port % 0xffff; + next_udp_port < 0xffff; next_udp_port += 2) { + rc = rtp_sub_socket_bind(&rs->rtp, ip, next_udp_port); + if (rc != 0) + continue; + + rc = rtp_sub_socket_bind(&rs->rtcp, ip, next_udp_port+1); + if (rc == 0) + break; + } + if (rc < 0) { + DEBUGPC(DLMUX, "failed\n"); + return rc; + } + + ia.s_addr = rs->rtp.sin_local.sin_addr.s_addr; + DEBUGPC(DLMUX, "BOUND_IP=%s, BOUND_PORT=%u\n", + inet_ntoa(ia), ntohs(rs->rtp.sin_local.sin_port)); + return ntohs(rs->rtp.sin_local.sin_port); +} + +static int rtp_sub_socket_connect(struct rtp_sub_socket *rss, + uint32_t ip, uint16_t port) +{ + int rc; + socklen_t alen = sizeof(rss->sin_local); + + rss->sin_remote.sin_family = AF_INET; + rss->sin_remote.sin_addr.s_addr = htonl(ip); + rss->sin_remote.sin_port = htons(port); + + rc = connect(rss->bfd.fd, (struct sockaddr *) &rss->sin_remote, + sizeof(rss->sin_remote)); + if (rc < 0) + return rc; + + return getsockname(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, + &alen); +} + +/*! \brief 'connect' a RTP socket to a remote peer + * \param[in] rs RTP socket to be connected + * \param[in] ip remote IP address to which to connect + * \param[in] port remote UDP port number to which to connect + */ +int rtp_socket_connect(struct rtp_socket *rs, uint32_t ip, uint16_t port) +{ + int rc; + struct in_addr ia; + + ia.s_addr = htonl(ip); + DEBUGP(DLMUX, "rtp_socket_connect(rs=%p, ip=%s, port=%u)\n", + rs, inet_ntoa(ia), port); + + rc = rtp_sub_socket_connect(&rs->rtp, ip, port); + if (rc < 0) + return rc; + + return rtp_sub_socket_connect(&rs->rtcp, ip, port+1); +} + +/*! \brief bind two RTP/RTCP sockets together in the proxy + * \param[in] this First RTP socket + * \param[in] other Second RTP socket + */ +int rtp_socket_proxy(struct rtp_socket *this, struct rtp_socket *other) +{ + DEBUGP(DLMUX, "rtp_socket_proxy(this=%p, other=%p)\n", + this, other); + + this->rx_action = RTP_PROXY; + this->proxy.other_sock = other; + + other->rx_action = RTP_PROXY; + other->proxy.other_sock = this; + + return 0; +} + +/*! \brief bind RTP/RTCP socket to application, disabling proxy + * \param[in] this RTP socket + * \param[in] net gsm_network argument to trau_tx_to_mncc() + * \param[in] callref callref argument to trau_tx_to_mncc() + */ +int rtp_socket_upstream(struct rtp_socket *this, struct gsm_network *net, + uint32_t callref) +{ + DEBUGP(DLMUX, "rtp_socket_proxy(this=%p, callref=%u)\n", + this, callref); + + if (callref) { + this->rx_action = RTP_RECV_UPSTREAM; + this->receive.net = net; + this->receive.callref = callref; + } else + this->rx_action = RTP_NONE; + + return 0; +} + +static void free_tx_queue(struct rtp_sub_socket *rss) +{ + struct msgb *msg; + + while ((msg = msgb_dequeue(&rss->tx_queue))) + msgb_free(msg); +} + +/*! \brief Free/release a previously allocated RTP socket + * \param[in[] rs RTP/RTCP socket to be released + */ +int rtp_socket_free(struct rtp_socket *rs) +{ + DEBUGP(DLMUX, "rtp_socket_free(rs=%p)\n", rs); + + /* make sure we don't leave references dangling to us */ + if (rs->rx_action == RTP_PROXY && + rs->proxy.other_sock) + rs->proxy.other_sock->proxy.other_sock = NULL; + + osmo_fd_unregister(&rs->rtp.bfd); + close(rs->rtp.bfd.fd); + free_tx_queue(&rs->rtp); + + osmo_fd_unregister(&rs->rtcp.bfd); + close(rs->rtcp.bfd.fd); + free_tx_queue(&rs->rtcp); + + talloc_free(rs); + + return 0; +} + +static int rtp_handle_lchan_signal(unsigned int subsys, unsigned int signal, + void *handler_data, void *signal_data) +{ + struct gsm_lchan *lchan; + struct lchan_signal_data *lchan_data; + + if (subsys != SS_LCHAN) + return 0; + + + lchan_data = signal_data; + if (!lchan_data->lchan || !lchan_data->lchan->conn) + return 0; + + lchan = lchan_data->lchan; + + switch (signal) { + case S_LCHAN_RTP_SOCKET_FREE: + rtp_socket_free(lchan->abis_ip.rtp_socket); + break; + } + + return 0; +} + +static __attribute__((constructor)) void on_dso_load_rtp_proxy(void) +{ + osmo_signal_register_handler(SS_LCHAN, rtp_handle_lchan_signal, NULL); +} diff --git a/openbsc/src/libtrau/Makefile.am b/openbsc/src/libtrau/Makefile.am index 0c8cf17..7b71417 100644 --- a/openbsc/src/libtrau/Makefile.am +++ b/openbsc/src/libtrau/Makefile.am @@ -4,4 +4,4 @@ AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(LIBOSMOABIS_LIBS) $(COVERA noinst_LIBRARIES = libtrau.a -libtrau_a_SOURCES = rtp_proxy.c trau_mux.c trau_upqueue.c +libtrau_a_SOURCES = trau_mux.c trau_upqueue.c diff --git a/openbsc/src/libtrau/rtp_proxy.c b/openbsc/src/libtrau/rtp_proxy.c deleted file mode 100644 index c011765..0000000 --- a/openbsc/src/libtrau/rtp_proxy.c +++ /dev/null @@ -1,816 +0,0 @@ -/* RTP proxy handling for ip.access nanoBTS */ - -/* (C) 2009-2013 by Harald Welte <laforge(a)gnumonks.org> - * 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/>. - * - */ - -#include <errno.h> -#include <unistd.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <sys/time.h> /* gettimeofday() */ -#include <unistd.h> /* get..() */ -#include <time.h> /* clock() */ -#include <sys/utsname.h> /* uname() */ - -#include <osmocom/core/talloc.h> -#include <openbsc/gsm_data.h> -#include <osmocom/core/msgb.h> -#include <osmocom/core/select.h> -#include <openbsc/debug.h> -#include <openbsc/rtp_proxy.h> -#include <openbsc/mncc.h> -#include <openbsc/trau_upqueue.h> - -/* attempt to determine byte order */ -#include <sys/param.h> -#include <limits.h> - -#ifndef __BYTE_ORDER -# ifdef __APPLE__ -# define __BYTE_ORDER __DARWIN_BYTE_ORDER -# define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN -# define __BIG_ENDIAN __DARWIN_BIG_ENDIAN -# else -# error "__BYTE_ORDER should be defined by someone" -# endif -#endif - -static LLIST_HEAD(rtp_sockets); - -/* should we mangle the CNAME inside SDES of RTCP packets? We disable - * this by default, as it seems to be not needed */ -static int mangle_rtcp_cname = 0; - -enum rtp_bfd_priv { - RTP_PRIV_NONE, - RTP_PRIV_RTP, - RTP_PRIV_RTCP -}; - -#define RTP_ALLOC_SIZE 1500 - -/* according to RFC 1889 */ -struct rtcp_hdr { - uint8_t byte0; - uint8_t type; - uint16_t length; -} __attribute__((packed)); - -#define RTCP_TYPE_SDES 202 - -#define RTCP_IE_CNAME 1 - -/* according to RFC 3550 */ -struct rtp_hdr { -#if __BYTE_ORDER == __LITTLE_ENDIAN - uint8_t csrc_count:4, - extension:1, - padding:1, - version:2; - uint8_t payload_type:7, - marker:1; -#elif __BYTE_ORDER == __BIG_ENDIAN - uint8_t version:2, - padding:1, - extension:1, - csrc_count:4; - uint8_t marker:1, - payload_type:7; -#endif - uint16_t sequence; - uint32_t timestamp; - uint32_t ssrc; -} __attribute__((packed)); - -struct rtp_x_hdr { - uint16_t by_profile; - uint16_t length; -} __attribute__((packed)); - -#define RTP_VERSION 2 - -/* decode an rtp frame and create a new buffer with payload */ -static int rtp_decode(struct msgb *msg, uint32_t callref, struct msgb **data) -{ - struct msgb *new_msg; - struct gsm_data_frame *frame; - struct rtp_hdr *rtph = (struct rtp_hdr *)msg->data; - struct rtp_x_hdr *rtpxh; - uint8_t *payload; - int payload_len; - int msg_type; - int x_len; - - if (msg->len < 12) { - DEBUGPC(DLMUX, "received RTP frame too short (len = %d)\n", - msg->len); - return -EINVAL; - } - if (rtph->version != RTP_VERSION) { - DEBUGPC(DLMUX, "received RTP version %d not supported.\n", - rtph->version); - return -EINVAL; - } - payload = msg->data + sizeof(struct rtp_hdr) + (rtph->csrc_count << 2); - payload_len = msg->len - sizeof(struct rtp_hdr) - (rtph->csrc_count << 2); - if (payload_len < 0) { - DEBUGPC(DLMUX, "received RTP frame too short (len = %d, " - "csrc count = %d)\n", msg->len, rtph->csrc_count); - return -EINVAL; - } - if (rtph->extension) { - if (payload_len < sizeof(struct rtp_x_hdr)) { - DEBUGPC(DLMUX, "received RTP frame too short for " - "extension header\n"); - return -EINVAL; - } - rtpxh = (struct rtp_x_hdr *)payload; - x_len = ntohs(rtpxh->length) * 4 + sizeof(struct rtp_x_hdr); - payload += x_len; - payload_len -= x_len; - if (payload_len < 0) { - DEBUGPC(DLMUX, "received RTP frame too short, " - "extension header exceeds frame length\n"); - return -EINVAL; - } - } - if (rtph->padding) { - if (payload_len < 1) { - DEBUGPC(DLMUX, "received RTP frame too short for " - "padding length\n"); - return -EINVAL; - } - payload_len -= payload[payload_len - 1]; - if (payload_len < 0) { - DEBUGPC(DLMUX, "received RTP frame with padding " - "greater than payload\n"); - return -EINVAL; - } - } - - switch (rtph->payload_type) { - case RTP_PT_GSM_FULL: - msg_type = GSM_TCHF_FRAME; - if (payload_len != RTP_LEN_GSM_FULL) { - DEBUGPC(DLMUX, "received RTP full rate frame with " - "payload length != %d (len = %d)\n", - RTP_LEN_GSM_FULL, payload_len); - return -EINVAL; - } - break; - case RTP_PT_GSM_EFR: - msg_type = GSM_TCHF_FRAME_EFR; - if (payload_len != RTP_LEN_GSM_EFR) { - DEBUGPC(DLMUX, "received RTP extended full rate frame " - "with payload length != %d (len = %d)\n", - RTP_LEN_GSM_EFR, payload_len); - return -EINVAL; - } - break; - case RTP_PT_GSM_HALF: - msg_type = GSM_TCHH_FRAME; - if (payload_len != RTP_LEN_GSM_HALF) { - DEBUGPC(DLMUX, "received RTP half rate frame with " - "payload length != %d (len = %d)\n", - RTP_LEN_GSM_HALF, payload_len); - return -EINVAL; - } - break; - case RTP_PT_AMR: - break; - default: - DEBUGPC(DLMUX, "received RTP frame with unknown payload " - "type %d\n", rtph->payload_type); - return -EINVAL; - } - - if (rtph->payload_type == RTP_PT_AMR) { - new_msg = msgb_alloc(sizeof(struct gsm_data_frame) + 1 - + payload_len, "GSM-DATA"); - } else { - new_msg = msgb_alloc(sizeof(struct gsm_data_frame) - + payload_len, "GSM-DATA"); - } - if (!new_msg) - return -ENOMEM; - frame = (struct gsm_data_frame *)(new_msg->data); - frame->msg_type = msg_type; - frame->callref = callref; - if (rtph->payload_type == RTP_PT_AMR) { - frame->data[0] = payload_len; - msgb_put(new_msg, sizeof(struct gsm_data_frame) + 1 - + payload_len); - memcpy(frame->data + 1, payload, payload_len); - } else { - msgb_put(new_msg, sizeof(struct gsm_data_frame) + payload_len); - memcpy(frame->data, payload, payload_len); - } - - *data = new_msg; - return 0; -} - -/* "to - from" */ -static void tv_difference(struct timeval *diff, const struct timeval *from, - const struct timeval *__to) -{ - struct timeval _to = *__to, *to = &_to; - - if (to->tv_usec < from->tv_usec) { - to->tv_sec -= 1; - to->tv_usec += 1000000; - } - - diff->tv_usec = to->tv_usec - from->tv_usec; - diff->tv_sec = to->tv_sec - from->tv_sec; -} - -/*! \brief encode and send a rtp frame - * \param[in] rs RTP socket through which we shall send - * \param[in] frame GSM RTP frame to be sent - */ -int rtp_send_frame(struct rtp_socket *rs, struct gsm_data_frame *frame) -{ - struct rtp_sub_socket *rss = &rs->rtp; - struct msgb *msg; - struct rtp_hdr *rtph; - int payload_type; - int payload_len; - int duration; /* in samples */ - int is_bfi = 0; - - if (rs->tx_action != RTP_SEND_DOWNSTREAM) { - /* initialize sequences */ - rs->tx_action = RTP_SEND_DOWNSTREAM; - rs->transmit.ssrc = rand(); - rs->transmit.sequence = random(); - rs->transmit.timestamp = random(); - } - - switch (frame->msg_type) { - case GSM_TCHF_FRAME: - payload_type = RTP_PT_GSM_FULL; - payload_len = RTP_LEN_GSM_FULL; - duration = RTP_GSM_DURATION; - break; - case GSM_TCHF_FRAME_EFR: - payload_type = RTP_PT_GSM_EFR; - payload_len = RTP_LEN_GSM_EFR; - duration = RTP_GSM_DURATION; - break; - case GSM_TCHH_FRAME: - payload_type = RTP_PT_GSM_HALF; - payload_len = RTP_LEN_GSM_HALF; - duration = RTP_GSM_DURATION; - break; - case GSM_TCH_FRAME_AMR: - payload_type = RTP_PT_AMR; - payload_len = frame->data[0]; - duration = RTP_GSM_DURATION; - break; - case GSM_BAD_FRAME: - payload_type = 0; - payload_len = 0; - duration = RTP_GSM_DURATION; - is_bfi = 1; - break; - default: - DEBUGPC(DLMUX, "unsupported message type %d\n", - frame->msg_type); - return -EINVAL; - } - - { - struct timeval tv, tv_diff; - long int usec_diff, frame_diff; - - gettimeofday(&tv, NULL); - tv_difference(&tv_diff, &rs->transmit.last_tv, &tv); - rs->transmit.last_tv = tv; - - usec_diff = tv_diff.tv_sec * 1000000 + tv_diff.tv_usec; - frame_diff = (usec_diff / 20000); - - if (abs(frame_diff) > 1) { - long int frame_diff_excess = frame_diff - 1; - - LOGP(DLMUX, LOGL_NOTICE, - "Correcting frame difference of %ld frames\n", frame_diff_excess); - rs->transmit.sequence += frame_diff_excess; - rs->transmit.timestamp += frame_diff_excess * duration; - } - } - - if (is_bfi) { - /* In case of a bad frame, just count and drop packt. */ - rs->transmit.timestamp += duration; - rs->transmit.sequence++; - return 0; - } - - msg = msgb_alloc(sizeof(struct rtp_hdr) + payload_len, "RTP-GSM-FULL"); - if (!msg) - return -ENOMEM; - rtph = (struct rtp_hdr *)msg->data; - rtph->version = RTP_VERSION; - rtph->padding = 0; - rtph->extension = 0; - rtph->csrc_count = 0; - rtph->marker = 0; - rtph->payload_type = payload_type; - rtph->sequence = htons(rs->transmit.sequence++); - rtph->timestamp = htonl(rs->transmit.timestamp); - rs->transmit.timestamp += duration; - rtph->ssrc = htonl(rs->transmit.ssrc); - if (frame->msg_type == GSM_TCH_FRAME_AMR) { - memcpy(msg->data + sizeof(struct rtp_hdr), frame->data + 1, - payload_len); - } else { - memcpy(msg->data + sizeof(struct rtp_hdr), frame->data, - payload_len); - } - msgb_put(msg, sizeof(struct rtp_hdr) + payload_len); - msgb_enqueue(&rss->tx_queue, msg); - rss->bfd.when |= BSC_FD_WRITE; - - return 0; -} - -/* iterate over all chunks in one RTCP message, look for CNAME IEs and - * replace all of those with 'new_cname' */ -static int rtcp_sdes_cname_mangle(struct msgb *msg, struct rtcp_hdr *rh, - uint16_t *rtcp_len, const char *new_cname) -{ - uint8_t *rtcp_end; - uint8_t *cur = (uint8_t *) rh; - uint8_t tag, len = 0; - - rtcp_end = cur + *rtcp_len; - /* move cur to end of RTP header */ - cur += sizeof(*rh); - - /* iterate over Chunks */ - while (cur+4 < rtcp_end) { - /* skip four bytes SSRC/CSRC */ - cur += 4; - - /* iterate over IE's inside the chunk */ - while (cur+1 < rtcp_end) { - tag = *cur++; - if (tag == 0) { - /* end of chunk, skip additional zero */ - while (*cur++ == 0) { } - break; - } - len = *cur++; - - if (tag == RTCP_IE_CNAME) { - /* we've found the CNAME, lets mangle it */ - if (len < strlen(new_cname)) { - /* we need to make more space */ - int increase = strlen(new_cname) - len; - - msgb_push(msg, increase); - memmove(cur+len+increase, cur+len, - rtcp_end - (cur+len)); - /* FIXME: we have to respect RTCP - * padding/alignment rules! */ - len += increase; - *(cur-1) += increase; - rtcp_end += increase; - *rtcp_len += increase; - } - /* copy new CNAME into message */ - memcpy(cur, new_cname, strlen(new_cname)); - /* FIXME: zero the padding in case new CNAME - * is smaller than old one !!! */ - } - cur += len; - } - } - - return 0; -} - -static int rtcp_mangle(struct msgb *msg, struct rtp_socket *rs) -{ - struct rtp_sub_socket *rss = &rs->rtcp; - struct rtcp_hdr *rtph; - uint16_t old_len; - int rc; - - if (!mangle_rtcp_cname) - return 0; - - printf("RTCP\n"); - /* iterate over list of RTCP messages */ - rtph = (struct rtcp_hdr *)msg->data; - while ((void *)rtph + sizeof(*rtph) <= (void *)msg->data + msg->len) { - old_len = (ntohs(rtph->length) + 1) * 4; - if ((void *)rtph + old_len > (void *)msg->data + msg->len) { - DEBUGPC(DLMUX, "received RTCP packet too short for " - "length element\n"); - return -EINVAL; - } - if (rtph->type == RTCP_TYPE_SDES) { - char new_cname[255]; - strncpy(new_cname, inet_ntoa(rss->sin_local.sin_addr), - sizeof(new_cname)); - new_cname[sizeof(new_cname)-1] = '\0'; - rc = rtcp_sdes_cname_mangle(msg, rtph, &old_len, - new_cname); - if (rc < 0) - return rc; - } - rtph = (void *)rtph + old_len; - } - - return 0; -} - -/* read from incoming RTP/RTCP socket */ -static int rtp_socket_read(struct rtp_socket *rs, struct rtp_sub_socket *rss) -{ - int rc; - struct msgb *msg = msgb_alloc(RTP_ALLOC_SIZE, "RTP/RTCP"); - struct msgb *new_msg; - struct rtp_sub_socket *other_rss; - - if (!msg) - return -ENOMEM; - - rc = read(rss->bfd.fd, msg->data, RTP_ALLOC_SIZE); - if (rc <= 0) { - rss->bfd.when &= ~BSC_FD_READ; - return rc; - } - - msgb_put(msg, rc); - - switch (rs->rx_action) { - case RTP_PROXY: - if (!rs->proxy.other_sock) { - rc = -EIO; - goto out_free; - } - if (rss->bfd.priv_nr == RTP_PRIV_RTP) - other_rss = &rs->proxy.other_sock->rtp; - else if (rss->bfd.priv_nr == RTP_PRIV_RTCP) { - other_rss = &rs->proxy.other_sock->rtcp; - /* modify RTCP SDES CNAME */ - rc = rtcp_mangle(msg, rs); - if (rc < 0) - goto out_free; - } else { - rc = -EINVAL; - goto out_free; - } - msgb_enqueue(&other_rss->tx_queue, msg); - other_rss->bfd.when |= BSC_FD_WRITE; - break; - - case RTP_RECV_UPSTREAM: - if (!rs->receive.callref || !rs->receive.net) { - rc = -EIO; - goto out_free; - } - if (rss->bfd.priv_nr == RTP_PRIV_RTCP) { - if (!mangle_rtcp_cname) { - msgb_free(msg); - break; - } - /* modify RTCP SDES CNAME */ - rc = rtcp_mangle(msg, rs); - if (rc < 0) - goto out_free; - msgb_enqueue(&rss->tx_queue, msg); - rss->bfd.when |= BSC_FD_WRITE; - break; - } - if (rss->bfd.priv_nr != RTP_PRIV_RTP) { - rc = -EINVAL; - goto out_free; - } - rc = rtp_decode(msg, rs->receive.callref, &new_msg); - if (rc < 0) - goto out_free; - msgb_free(msg); - trau_tx_to_mncc(rs->receive.net, new_msg); - break; - - case RTP_NONE: /* if socket exists, but disabled by app */ - msgb_free(msg); - break; - } - - return 0; - -out_free: - msgb_free(msg); - return rc; -} - -/* \brief write from tx_queue to RTP/RTCP socket */ -static int rtp_socket_write(struct rtp_socket *rs, struct rtp_sub_socket *rss) -{ - struct msgb *msg; - int written; - - msg = msgb_dequeue(&rss->tx_queue); - if (!msg) { - rss->bfd.when &= ~BSC_FD_WRITE; - return 0; - } - - written = write(rss->bfd.fd, msg->data, msg->len); - if (written < msg->len) { - LOGP(DLMIB, LOGL_ERROR, "short write"); - msgb_free(msg); - return -EIO; - } - - msgb_free(msg); - - return 0; -} - - -/*! \brief callback for the select.c:bfd_* layer */ -static int rtp_bfd_cb(struct osmo_fd *bfd, unsigned int flags) -{ - struct rtp_socket *rs = bfd->data; - struct rtp_sub_socket *rss; - - switch (bfd->priv_nr) { - case RTP_PRIV_RTP: - rss = &rs->rtp; - break; - case RTP_PRIV_RTCP: - rss = &rs->rtcp; - break; - default: - return -EINVAL; - } - - if (flags & BSC_FD_READ) - rtp_socket_read(rs, rss); - - if (flags & BSC_FD_WRITE) - rtp_socket_write(rs, rss); - - return 0; -} - -/*! \brief initialize one rtp sub-socket */ -static void init_rss(struct rtp_sub_socket *rss, - struct rtp_socket *rs, int fd, int priv_nr) -{ - /* initialize bfd */ - rss->bfd.fd = fd; - rss->bfd.data = rs; - rss->bfd.priv_nr = priv_nr; - rss->bfd.cb = rtp_bfd_cb; -} - -/*! \brief create a new RTP/RTCP socket and bind it */ -struct rtp_socket *rtp_socket_create(void) -{ - int rc; - struct rtp_socket *rs; - - DEBUGP(DLMUX, "rtp_socket_create(): "); - - rs = talloc_zero(tall_bsc_ctx, struct rtp_socket); - if (!rs) - return NULL; - - INIT_LLIST_HEAD(&rs->rtp.tx_queue); - INIT_LLIST_HEAD(&rs->rtcp.tx_queue); - - rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - if (rc < 0) - goto out_free; - - init_rss(&rs->rtp, rs, rc, RTP_PRIV_RTP); - rc = osmo_fd_register(&rs->rtp.bfd); - if (rc < 0) - goto out_rtp_socket; - - rc = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - if (rc < 0) - goto out_rtp_bfd; - - init_rss(&rs->rtcp, rs, rc, RTP_PRIV_RTCP); - rc = osmo_fd_register(&rs->rtcp.bfd); - if (rc < 0) - goto out_rtcp_socket; - - DEBUGPC(DLMUX, "success\n"); - - rc = rtp_socket_bind(rs, INADDR_ANY); - if (rc < 0) - goto out_rtcp_bfd; - - return rs; - -out_rtcp_bfd: - osmo_fd_unregister(&rs->rtcp.bfd); -out_rtcp_socket: - close(rs->rtcp.bfd.fd); -out_rtp_bfd: - osmo_fd_unregister(&rs->rtp.bfd); -out_rtp_socket: - close(rs->rtp.bfd.fd); -out_free: - talloc_free(rs); - DEBUGPC(DLMUX, "failed\n"); - return NULL; -} - -static int rtp_sub_socket_bind(struct rtp_sub_socket *rss, uint32_t ip, - uint16_t port) -{ - int rc; - socklen_t alen = sizeof(rss->sin_local); - - rss->sin_local.sin_family = AF_INET; - rss->sin_local.sin_addr.s_addr = htonl(ip); - rss->sin_local.sin_port = htons(port); - rss->bfd.when |= BSC_FD_READ; - - rc = bind(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, - sizeof(rss->sin_local)); - if (rc < 0) - return rc; - - /* retrieve the address we actually bound to, in case we - * passed INADDR_ANY as IP address */ - return getsockname(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, - &alen); -} - -#define RTP_PORT_BASE 30000 -static unsigned int next_udp_port = RTP_PORT_BASE; - -/*! \brief bind a RTP socket to a specific local address - * \param[in] rs RTP socket to be bound - * \param[in] ip local IP address to which socket is to be bound - */ -int rtp_socket_bind(struct rtp_socket *rs, uint32_t ip) -{ - int rc = -EIO; - struct in_addr ia; - - ia.s_addr = htonl(ip); - DEBUGP(DLMUX, "rtp_socket_bind(rs=%p, IP=%s): ", rs, - inet_ntoa(ia)); - - /* try to bind to a consecutive pair of ports */ - for (next_udp_port = next_udp_port % 0xffff; - next_udp_port < 0xffff; next_udp_port += 2) { - rc = rtp_sub_socket_bind(&rs->rtp, ip, next_udp_port); - if (rc != 0) - continue; - - rc = rtp_sub_socket_bind(&rs->rtcp, ip, next_udp_port+1); - if (rc == 0) - break; - } - if (rc < 0) { - DEBUGPC(DLMUX, "failed\n"); - return rc; - } - - ia.s_addr = rs->rtp.sin_local.sin_addr.s_addr; - DEBUGPC(DLMUX, "BOUND_IP=%s, BOUND_PORT=%u\n", - inet_ntoa(ia), ntohs(rs->rtp.sin_local.sin_port)); - return ntohs(rs->rtp.sin_local.sin_port); -} - -static int rtp_sub_socket_connect(struct rtp_sub_socket *rss, - uint32_t ip, uint16_t port) -{ - int rc; - socklen_t alen = sizeof(rss->sin_local); - - rss->sin_remote.sin_family = AF_INET; - rss->sin_remote.sin_addr.s_addr = htonl(ip); - rss->sin_remote.sin_port = htons(port); - - rc = connect(rss->bfd.fd, (struct sockaddr *) &rss->sin_remote, - sizeof(rss->sin_remote)); - if (rc < 0) - return rc; - - return getsockname(rss->bfd.fd, (struct sockaddr *)&rss->sin_local, - &alen); -} - -/*! \brief 'connect' a RTP socket to a remote peer - * \param[in] rs RTP socket to be connected - * \param[in] ip remote IP address to which to connect - * \param[in] port remote UDP port number to which to connect - */ -int rtp_socket_connect(struct rtp_socket *rs, uint32_t ip, uint16_t port) -{ - int rc; - struct in_addr ia; - - ia.s_addr = htonl(ip); - DEBUGP(DLMUX, "rtp_socket_connect(rs=%p, ip=%s, port=%u)\n", - rs, inet_ntoa(ia), port); - - rc = rtp_sub_socket_connect(&rs->rtp, ip, port); - if (rc < 0) - return rc; - - return rtp_sub_socket_connect(&rs->rtcp, ip, port+1); -} - -/*! \brief bind two RTP/RTCP sockets together in the proxy - * \param[in] this First RTP socket - * \param[in] other Second RTP socket - */ -int rtp_socket_proxy(struct rtp_socket *this, struct rtp_socket *other) -{ - DEBUGP(DLMUX, "rtp_socket_proxy(this=%p, other=%p)\n", - this, other); - - this->rx_action = RTP_PROXY; - this->proxy.other_sock = other; - - other->rx_action = RTP_PROXY; - other->proxy.other_sock = this; - - return 0; -} - -/*! \brief bind RTP/RTCP socket to application, disabling proxy - * \param[in] this RTP socket - * \param[in] net gsm_network argument to trau_tx_to_mncc() - * \param[in] callref callref argument to trau_tx_to_mncc() - */ -int rtp_socket_upstream(struct rtp_socket *this, struct gsm_network *net, - uint32_t callref) -{ - DEBUGP(DLMUX, "rtp_socket_proxy(this=%p, callref=%u)\n", - this, callref); - - if (callref) { - this->rx_action = RTP_RECV_UPSTREAM; - this->receive.net = net; - this->receive.callref = callref; - } else - this->rx_action = RTP_NONE; - - return 0; -} - -static void free_tx_queue(struct rtp_sub_socket *rss) -{ - struct msgb *msg; - - while ((msg = msgb_dequeue(&rss->tx_queue))) - msgb_free(msg); -} - -/*! \brief Free/release a previously allocated RTP socket - * \param[in[] rs RTP/RTCP socket to be released - */ -int rtp_socket_free(struct rtp_socket *rs) -{ - DEBUGP(DLMUX, "rtp_socket_free(rs=%p)\n", rs); - - /* make sure we don't leave references dangling to us */ - if (rs->rx_action == RTP_PROXY && - rs->proxy.other_sock) - rs->proxy.other_sock->proxy.other_sock = NULL; - - osmo_fd_unregister(&rs->rtp.bfd); - close(rs->rtp.bfd.fd); - free_tx_queue(&rs->rtp); - - osmo_fd_unregister(&rs->rtcp.bfd); - close(rs->rtcp.bfd.fd); - free_tx_queue(&rs->rtcp); - - talloc_free(rs); - - return 0; -} -- 1.8.1.5 --------------010802080805090906090602--

1 0

[PATCH] Move rtp_proxy.c from libtrau to libmsc
by Andreas Eversberg 18 Apr '14

18 Apr '14

1 0

[PATCH] sms: Rename gsm340_gen_oa() to gsm340_gen_address_field().
by Alexander Chemeris 18 Apr '14

18 Apr '14

An according change in the OpoenBSC is following. Since we're changing the external API we should probably increase a lib version as well. -- Regards, Alexander Chemeris. CEO, Fairwaves, Inc. / ООО УмРадио https://fairwaves.co

2 11

[PATCH] ipa: Be consistent in checking conn->cfg (Coverity)
by Jacob Erlbeck 03 Apr '14

03 Apr '14

Coverity complains about checking connection->cfg in bsc_close_connection() at one place but not at the second. This patch fixes this by adding a check before accessing cfg when generating the 'partial message' log message. Fixes: Coverity CID 1195180 Sponsored-by: On-Waves ehf --- openbsc/src/osmo-bsc_nat/bsc_nat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat.c b/openbsc/src/osmo-bsc_nat/bsc_nat.c index 524186a..9defbd2 100644 --- a/openbsc/src/osmo-bsc_nat/bsc_nat.c +++ b/openbsc/src/osmo-bsc_nat/bsc_nat.c @@ -916,7 +916,7 @@ void bsc_close_connection(struct bsc_connection *connection) if (connection->pending_msg) { LOGP(DNAT, LOGL_ERROR, "Dropping partial message on connection %d.\n", - connection->cfg->nr); + connection->cfg ? connection->cfg->nr : -1); msgb_free(connection->pending_msg); connection->pending_msg = NULL; } -- 1.7.9.5

1 0

SMPP + OpenBSC
by Jesús Vega Diaz 02 Apr '14

02 Apr '14

Hi all; I have deployed one ipaccess nanoBTS 1800, with OpenBSC (osmo-nitb) and all the osmocom suite apps. I have already make succesfully GSM calls, SMS, and GPRS/EDGE packet data connections. I now want support for sending binary SMS, i have read that with SMPP i would can. I have compiled OpenBSC with SMPP but now I don´t know how to use it, i think it is in the OpenBSC vty, but i don´t know the commands or how to use the interface. If you can give me some light in this thread i will grant you. Sorry for my English Best Regards Jesús Vega Diaz

4 5

DRAFT for a 30C3 report. Care to review?
by Holger Hans Peter Freyther 01 Apr '14

01 Apr '14

hi, Daniel and me started a small report for the 30C3 network but we are kind of stalled. Anyone feels like doing some review and providing feedback? holger

3 2

Possibility to use INET socket for external MNCC
by Luca Valtulina 01 Apr '14

01 Apr '14

Hi list, wouldn't be useful to have the possibility to choose (at least) between UNIX and INET socket to be used for connecting to an external MNCC? If this will be the case where should the choice be made? I was thinking to add an extra option to bsc_hack but the choice can also be hard-coded (prior to compilation). cheers luca

4 5

OsmoTRX on Parallella.
by Andrew Back 01 Apr '14

01 Apr '14

I wrote a blog post about running Osmocom on Parallella, with UmTRX: http://www.rs-online.com/designspark/electronics/eng/blog/building-a-gsm-ba… Just using the dual-core ARM in the Zynq, so nothing surprising/interesting to this list and it's more of just an intro. However, I'm curious as to opportunities for improving the performance by offloading parts of the transceiver to the Epiphany chip. Does anyone have any views on how practical this might be, effort involved and potential gains etc? Cheers, Andrew -- Andrew Back http://carrierdetect.com

1 0

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