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-rw-r--r--openbsc/src/telnet_interface.c236
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diff --git a/openbsc/src/telnet_interface.c b/openbsc/src/telnet_interface.c
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+/* minimalistic telnet/network interface it might turn into a wire interface */
+/* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <openbsc/telnet_interface.h>
+#include <openbsc/gsm_subscriber.h>
+#include <openbsc/chan_alloc.h>
+#include <openbsc/gsm_04_08.h>
+#include <openbsc/gsm_04_11.h>
+#include <openbsc/msgb.h>
+#include <openbsc/abis_rsl.h>
+#include <openbsc/paging.h>
+#include <openbsc/signal.h>
+
+#include <vty/buffer.h>
+
+#define WRITE_CONNECTION(fd, msg...) \
+ int ret; \
+ char buf[4096]; \
+ snprintf(buf, sizeof(buf), msg); \
+ ret = write(fd, buf, strlen(buf));
+
+
+/* per connection data */
+LLIST_HEAD(active_connections);
+
+/* per network data */
+static int telnet_new_connection(struct bsc_fd *fd, unsigned int what);
+#if 0
+static int telnet_paging_callback(unsigned int subsys, unsigned int signal,
+ void *handler_data, void *signal_data);
+static int telnet_sms_callback(unsigned int subsys, unsigned int signal,
+ void *handler_data, void *signal_data);
+#endif
+
+static struct bsc_fd server_socket = {
+ .when = BSC_FD_READ,
+ .cb = telnet_new_connection,
+ .priv_nr = 0,
+};
+
+void telnet_init(struct gsm_network *network, int port) {
+ struct sockaddr_in sock_addr;
+ int fd, on = 1;
+
+ bsc_vty_init(network);
+
+ fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+
+ if (fd < 0) {
+ perror("Telnet interface socket creation failed");
+ return;
+ }
+
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+ memset(&sock_addr, 0, sizeof(sock_addr));
+ sock_addr.sin_family = AF_INET;
+ sock_addr.sin_port = htons(port);
+ sock_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+ if (bind(fd, (struct sockaddr*)&sock_addr, sizeof(sock_addr)) < 0) {
+ perror("Telnet interface failed to bind");
+ return;
+ }
+
+ if (listen(fd, 0) < 0) {
+ perror("Telnet interface failed to listen");
+ return;
+ }
+
+ server_socket.data = network;
+ server_socket.fd = fd;
+ bsc_register_fd(&server_socket);
+
+ /* register callbacks */
+#if 0
+ register_signal_handler(SS_PAGING, telnet_paging_callback, network);
+ register_signal_handler(SS_SMS, telnet_sms_callback, network);
+#endif
+}
+
+static void print_welcome(int fd) {
+ int ret;
+ static char *msg =
+ "Welcome to the OpenBSC Control interface\n"
+ "Copyright (C) 2008, 2009 Harald Welte\n"
+ "Contributions by Daniel Willmann, Jan Lübbe, "
+ "Stefan Schmidt, Holger Freyther\n\n"
+ "License GPLv2+: GNU GPL version 2 or later "
+ "<http://gnu.org/licenses/gpl.html>\n"
+ "This is free software: you are free to change "
+ "and redistribute it.\n"
+ "There is NO WARRANTY, to the extent permitted "
+ "by law.\nType \"help\" to get a short introduction.\n";
+
+ ret = write(fd, msg, strlen(msg));
+}
+
+int telnet_close_client(struct bsc_fd *fd) {
+ struct telnet_connection *conn = (struct telnet_connection*)fd->data;
+
+ close(fd->fd);
+ bsc_unregister_fd(fd);
+ llist_del(&conn->entry);
+ free(conn);
+ return 0;
+}
+
+static int client_data(struct bsc_fd *fd, unsigned int what)
+{
+ struct telnet_connection *conn = fd->data;
+ int rc = 0;
+
+ if (what & BSC_FD_READ) {
+ conn->fd.when &= ~BSC_FD_READ;
+ rc = vty_read(conn->vty);
+ }
+
+ if (what & BSC_FD_WRITE) {
+ rc = buffer_flush_all(conn->vty->obuf, fd->fd);
+ if (rc == BUFFER_EMPTY)
+ conn->fd.when &= ~BSC_FD_WRITE;
+ }
+
+ return rc;
+}
+
+static int telnet_new_connection(struct bsc_fd *fd, unsigned int what) {
+ struct telnet_connection *connection;
+ struct sockaddr_in sockaddr;
+ socklen_t len = sizeof(sockaddr);
+ int new_connection = accept(fd->fd, (struct sockaddr*)&sockaddr, &len);
+
+ if (new_connection < 0) {
+ perror("telnet accept failed");
+ return -1;
+ }
+
+
+ connection = (struct telnet_connection*)malloc(sizeof(*connection));
+ memset(connection, 0, sizeof(*connection));
+ connection->network = (struct gsm_network*)fd->data;
+ connection->fd.data = connection;
+ connection->fd.fd = new_connection;
+ connection->fd.when = BSC_FD_READ;
+ connection->fd.cb = client_data;
+ connection->bts = 0;
+ bsc_register_fd(&connection->fd);
+ llist_add_tail(&connection->entry, &active_connections);
+
+ print_welcome(new_connection);
+
+ connection->vty = vty_create(new_connection, connection);
+ if (!connection->vty)
+ return -1;
+
+ return 0;
+}
+
+/* callback from VTY code */
+void vty_event(enum event event, int sock, struct vty *vty)
+{
+ struct telnet_connection *connection = vty->priv;
+ struct bsc_fd *bfd = &connection->fd;
+
+ switch (event) {
+ case VTY_READ:
+ bfd->when |= BSC_FD_READ;
+ break;
+ case VTY_WRITE:
+ bfd->when |= BSC_FD_WRITE;
+ break;
+ default:
+ break;
+ }
+}
+
+#if 0
+static int telnet_paging_callback(unsigned int subsys, unsigned int singal,
+ void *handler_data, void *signal_data)
+{
+ struct paging_signal_data *paging = signal_data;
+ struct telnet_connection *con;
+
+ llist_for_each_entry(con, &active_connections, entry) {
+ if (paging->lchan) {
+ WRITE_CONNECTION(con->fd.fd, "Paging succeeded\n");
+ show_lchan(con->fd.fd, paging->lchan);
+ } else {
+ WRITE_CONNECTION(con->fd.fd, "Paging failed for subscriber: %s/%s/%s\n",
+ paging->subscr->imsi,
+ paging->subscr->tmsi,
+ paging->subscr->name);
+ }
+ }
+
+ return 0;
+}
+
+static int telnet_sms_callback(unsigned int subsys, unsigned int signal,
+ void *handler_data, void *signal_data)
+{
+ struct sms_submit *sms = signal_data;
+ struct telnet_connection *con;
+
+ llist_for_each_entry(con, &active_connections, entry) {
+ WRITE_CONNECTION(con->fd.fd, "Incoming SMS: %s\n", sms->user_data);
+ }
+
+ return 0;
+}
+#endif