| /* MGCP common implementations. |
| * These are used in libosmo-mgcp as well as libosmo-mgcp-client. |
| * To avoid interdependency, these are implemented in .h file only. */ |
| |
| /* |
| * (C) 2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| * (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/>. |
| * |
| */ |
| |
| /* Two copies of this file are kept in osmocom/mgcp/ and osmocom/mgcp_client/. |
| * Since both are by definition identical, use the old header exclusion ifdefs |
| * instead of '#pragma once' to avoid including both of these files. |
| * Though at the time of writing there are no such users, this allows including |
| * both libosmo-mgcp and libosmo-mgcp-client headers in the same file. */ |
| #ifndef OSMO_MGCP_COMMON_H |
| #define OSMO_MGCP_COMMON_H |
| |
| #include <string.h> |
| #include <errno.h> |
| |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/logging.h> |
| |
| #define for_each_non_empty_line(line, save) \ |
| for (line = strtok_r(NULL, "\r\n", &save); line; \ |
| line = strtok_r(NULL, "\r\n", &save)) |
| |
| enum mgcp_connection_mode { |
| MGCP_CONN_NONE = 0, |
| MGCP_CONN_RECV_ONLY = 1, |
| MGCP_CONN_SEND_ONLY = 2, |
| MGCP_CONN_RECV_SEND = MGCP_CONN_RECV_ONLY | MGCP_CONN_SEND_ONLY, |
| MGCP_CONN_LOOPBACK = 4 | MGCP_CONN_RECV_SEND, |
| }; |
| |
| #define MGCP_X_OSMO_IGN_HEADER "X-Osmo-IGN:" |
| #define MGCP_X_OSMO_OSMUX_HEADER "X-Osmux:" |
| |
| /* Values should be bitwise-OR-able */ |
| enum mgcp_x_osmo_ign { |
| MGCP_X_OSMO_IGN_NONE = 0, |
| MGCP_X_OSMO_IGN_CALLID = 1, |
| }; |
| |
| /* Codec parameters (communicated via SDP/fmtp) */ |
| struct mgcp_codec_param { |
| bool amr_octet_aligned_present; |
| bool amr_octet_aligned; |
| }; |
| |
| /* Ensure that the msg->l2h is NUL terminated. */ |
| static inline int mgcp_msg_terminate_nul(struct msgb *msg) |
| { |
| unsigned char *tail = msg->l2h + msgb_l2len(msg); /* char after l2 data */ |
| if (tail[-1] == '\0') |
| /* nothing to do */; |
| else if (msgb_tailroom(msg) > 0) |
| tail[0] = '\0'; |
| else if (tail[-1] == '\r' || tail[-1] == '\n') |
| tail[-1] = '\0'; |
| else { |
| LOGP(DLMGCP, LOGL_ERROR, "Cannot NUL terminate MGCP message: " |
| "Length: %d, Buffer size: %d\n", |
| msgb_l2len(msg), msg->data_len); |
| return -ENOTSUP; |
| } |
| return 0; |
| } |
| |
| /* Maximum length of the comment field */ |
| #define MGCP_COMMENT_MAXLEN 256 |
| |
| /* Maximum allowed String length of Connection Identifiers as per spec |
| * (see also RFC3435 2.1.3.2 Names of Connections), plus one for '\0'. */ |
| #define MGCP_CONN_ID_MAXLEN 32+1 |
| |
| /* Deprecated: old name of MGCP_CONN_ID_MAXLEN. */ |
| #define MGCP_CONN_ID_LENGTH MGCP_CONN_ID_MAXLEN |
| |
| /* String length of Endpoint Identifiers. |
| / (see also RFC3435 section 3.2.1.3) */ |
| #define MGCP_ENDPOINT_MAXLEN (255*2+1+1) |
| |
| /* A prefix to denote the virtual trunk (RTP on both ends) */ |
| #define MGCP_ENDPOINT_PREFIX_VIRTUAL_TRUNK "rtpbridge/" |
| |
| /* A prefix to denote the e1 trunk |
| * (see also RFC3435 section E.2) */ |
| #define MGCP_ENDPOINT_PREFIX_E1_TRUNK "ds/e1-" |
| |
| /* Maximal number of payload types / codecs that can be negotiated via SDP at |
| * at once. */ |
| #define MGCP_MAX_CODECS 10 |
| |
| #endif |