| /* 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, |
| }; |
| |
| /* 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; |
| } |
| |
| #endif |