Neels Hofmeyr | e9920f2 | 2017-07-10 15:07:22 +0200 | [diff] [blame] | 1 | /* Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| 2 | /* Implementations useful both for the MGCP GW as well as MGCP GW clients */ |
| 3 | |
| 4 | /* |
| 5 | * (C) 2016 by sysmocom s.m.f.c. GmbH <info@sysmocom.de> |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU Affero General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <errno.h> |
| 24 | |
| 25 | #include <osmocom/core/utils.h> |
| 26 | #include <osmocom/legacy_mgcp/mgcp.h> |
| 27 | |
| 28 | const struct value_string mgcp_connection_mode_strs[] = { |
| 29 | { MGCP_CONN_NONE, "none" }, |
| 30 | { MGCP_CONN_RECV_SEND, "sendrecv" }, |
| 31 | { MGCP_CONN_SEND_ONLY, "sendonly" }, |
| 32 | { MGCP_CONN_RECV_ONLY, "recvonly" }, |
| 33 | { MGCP_CONN_LOOPBACK, "loopback" }, |
| 34 | { 0, NULL } |
| 35 | }; |
| 36 | |
| 37 | /* Ensure that the msg->l2h is NUL terminated. */ |
| 38 | int mgcp_msg_terminate_nul(struct msgb *msg) |
| 39 | { |
| 40 | unsigned char *tail = msg->l2h + msgb_l2len(msg); /* char after l2 data */ |
| 41 | if (tail[-1] == '\0') |
| 42 | /* nothing to do */; |
| 43 | else if (msgb_tailroom(msg) > 0) |
| 44 | tail[0] = '\0'; |
| 45 | else if (tail[-1] == '\r' || tail[-1] == '\n') |
| 46 | tail[-1] = '\0'; |
| 47 | else { |
| 48 | LOGP(DLMGCP, LOGL_ERROR, "Cannot NUL terminate MGCP message: " |
| 49 | "Length: %d, Buffer size: %d\n", |
| 50 | msgb_l2len(msg), msg->data_len); |
| 51 | return -ENOTSUP; |
| 52 | } |
| 53 | return 0; |
| 54 | } |