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Diffstat (limited to 'src/osmo-bsc_nat/bsc_nat_ctrl.c')
-rw-r--r--src/osmo-bsc_nat/bsc_nat_ctrl.c525
1 files changed, 0 insertions, 525 deletions
diff --git a/src/osmo-bsc_nat/bsc_nat_ctrl.c b/src/osmo-bsc_nat/bsc_nat_ctrl.c
deleted file mode 100644
index ff6a73978..000000000
--- a/src/osmo-bsc_nat/bsc_nat_ctrl.c
+++ /dev/null
@@ -1,525 +0,0 @@
-/*
- * (C) 2011-2012 by Holger Hans Peter Freyther
- * (C) 2011-2012 by On-Waves
- * (C) 2011 by Daniel Willmann
- * 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 <osmocom/core/talloc.h>
-
-#include <osmocom/ctrl/control_cmd.h>
-#include <osmocom/ctrl/control_if.h>
-#include <osmocom/ctrl/ports.h>
-
-#include <osmocom/vty/misc.h>
-
-#include <openbsc/ctrl.h>
-#include <openbsc/bsc_nat.h>
-#include <openbsc/bsc_msg_filter.h>
-#include <openbsc/vty.h>
-#include <openbsc/gsm_data.h>
-#include <openbsc/debug.h>
-
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-
-
-#define NAT_MAX_CTRL_ID 65535
-
-static struct bsc_nat *g_nat;
-
-static int bsc_id_unused(int id, struct bsc_connection *bsc)
-{
- struct bsc_cmd_list *pending;
-
- llist_for_each_entry(pending, &bsc->cmd_pending, list_entry) {
- if (pending->nat_id == id)
- return 0;
- }
- return 1;
-}
-
-static int get_next_free_bsc_id(struct bsc_connection *bsc)
-{
- int new_id, overflow = 0;
-
- new_id = bsc->last_id;
-
- do {
- new_id++;
- if (new_id == NAT_MAX_CTRL_ID) {
- new_id = 1;
- overflow++;
- }
-
- if (bsc_id_unused(new_id, bsc)) {
- bsc->last_id = new_id;
- return new_id;
- }
- } while (overflow != 2);
-
- return -1;
-}
-
-void bsc_nat_ctrl_del_pending(struct bsc_cmd_list *pending)
-{
- llist_del(&pending->list_entry);
- osmo_timer_del(&pending->timeout);
- talloc_free(pending->cmd);
- talloc_free(pending);
-}
-
-static struct bsc_cmd_list *bsc_get_pending(struct bsc_connection *bsc, char *id_str)
-{
- struct bsc_cmd_list *cmd_entry;
- int id = atoi(id_str);
- if (id == 0)
- return NULL;
-
- llist_for_each_entry(cmd_entry, &bsc->cmd_pending, list_entry) {
- if (cmd_entry->nat_id == id) {
- return cmd_entry;
- }
- }
- return NULL;
-}
-
-int bsc_nat_handle_ctrlif_msg(struct bsc_connection *bsc, struct msgb *msg)
-{
- struct ctrl_cmd *cmd;
- struct bsc_cmd_list *pending;
- char *var, *id;
-
- cmd = ctrl_cmd_parse(bsc, msg);
- msgb_free(msg);
-
- if (!cmd) {
- cmd = talloc_zero(bsc, struct ctrl_cmd);
- if (!cmd) {
- LOGP(DNAT, LOGL_ERROR, "OOM!\n");
- return -ENOMEM;
- }
- cmd->type = CTRL_TYPE_ERROR;
- cmd->id = "err";
- cmd->reply = "Failed to parse command.";
- goto err;
- }
-
- if (bsc->cfg && !llist_empty(&bsc->cfg->lac_list)) {
- if (cmd->variable) {
- var = talloc_asprintf(cmd, "net.0.bsc.%i.%s", bsc->cfg->nr,
- cmd->variable);
- if (!var) {
- cmd->type = CTRL_TYPE_ERROR;
- cmd->reply = "OOM";
- goto err;
- }
- talloc_free(cmd->variable);
- cmd->variable = var;
- }
-
- /* We have to handle TRAPs before matching pending */
- if (cmd->type == CTRL_TYPE_TRAP) {
- ctrl_cmd_send_to_all(bsc->nat->ctrl, cmd);
- talloc_free(cmd);
- return 0;
- }
-
- /* Find the pending command */
- pending = bsc_get_pending(bsc, cmd->id);
- if (pending) {
- id = talloc_strdup(cmd, pending->cmd->id);
- if (!id) {
- cmd->type = CTRL_TYPE_ERROR;
- cmd->reply = "OOM";
- goto err;
- }
- cmd->id = id;
- ctrl_cmd_send(&pending->ccon->write_queue, cmd);
- bsc_nat_ctrl_del_pending(pending);
- } else {
- /* We need to handle TRAPS here */
- if ((cmd->type != CTRL_TYPE_ERROR) &&
- (cmd->type != CTRL_TYPE_TRAP)) {
- LOGP(DNAT, LOGL_NOTICE, "Got control message "
- "from BSC without pending entry\n");
- cmd->type = CTRL_TYPE_ERROR;
- cmd->reply = "No request outstanding";
- goto err;
- }
- }
- }
- talloc_free(cmd);
- return 0;
-err:
- ctrl_cmd_send(&bsc->write_queue, cmd);
- talloc_free(cmd);
- return 0;
-}
-
-static void pending_timeout_cb(void *data)
-{
- struct bsc_cmd_list *pending = data;
- LOGP(DNAT, LOGL_ERROR, "Command timed out\n");
- pending->cmd->type = CTRL_TYPE_ERROR;
- pending->cmd->reply = "Command timed out";
- ctrl_cmd_send(&pending->ccon->write_queue, pending->cmd);
-
- bsc_nat_ctrl_del_pending(pending);
-}
-
-static void ctrl_conn_closed_cb(struct ctrl_connection *connection)
-{
- struct bsc_connection *bsc;
- struct bsc_cmd_list *pending, *tmp;
-
- llist_for_each_entry(bsc, &g_nat->bsc_connections, list_entry) {
- llist_for_each_entry_safe(pending, tmp, &bsc->cmd_pending, list_entry) {
- if (pending->ccon == connection)
- bsc_nat_ctrl_del_pending(pending);
- }
- }
-}
-
-static int extract_bsc_nr_variable(char *variable, unsigned int *nr, char **bsc_variable)
-{
- char *nr_str, *tmp, *saveptr = NULL;
-
- tmp = strtok_r(variable, ".", &saveptr);
- tmp = strtok_r(NULL, ".", &saveptr);
- tmp = strtok_r(NULL, ".", &saveptr);
- nr_str = strtok_r(NULL, ".", &saveptr);
- if (!nr_str)
- return 0;
- *nr = atoi(nr_str);
-
- tmp = strtok_r(NULL, "\0", &saveptr);
- if (!tmp)
- return 0;
-
- *bsc_variable = tmp;
- return 1;
-}
-
-static int forward_to_bsc(struct ctrl_cmd *cmd)
-{
- int ret = CTRL_CMD_HANDLED;
- struct ctrl_cmd *bsc_cmd = NULL;
- struct bsc_connection *bsc;
- struct bsc_cmd_list *pending;
- unsigned int nr;
- char *bsc_variable;
-
- /* Skip over the beginning (bsc.) */
- if (!extract_bsc_nr_variable(cmd->variable, &nr, &bsc_variable)) {
- cmd->reply = "command incomplete";
- goto err;
- }
-
-
- llist_for_each_entry(bsc, &g_nat->bsc_connections, list_entry) {
- if (!bsc->cfg)
- continue;
- if (!bsc->authenticated)
- continue;
- if (bsc->cfg->nr == nr) {
- /* Add pending command to list */
- pending = talloc_zero(bsc, struct bsc_cmd_list);
- if (!pending) {
- cmd->reply = "OOM";
- goto err;
- }
-
- pending->nat_id = get_next_free_bsc_id(bsc);
- if (pending->nat_id < 0) {
- cmd->reply = "No free ID found";
- goto err;
- }
-
- bsc_cmd = ctrl_cmd_cpy(bsc, cmd);
- if (!bsc_cmd) {
- cmd->reply = "Could not forward command";
- goto err;
- }
-
- talloc_free(bsc_cmd->id);
- bsc_cmd->id = talloc_asprintf(bsc_cmd, "%i", pending->nat_id);
- if (!bsc_cmd->id) {
- cmd->reply = "OOM";
- goto err;
- }
-
- talloc_free(bsc_cmd->variable);
- bsc_cmd->variable = talloc_strdup(bsc_cmd, bsc_variable);
- if (!bsc_cmd->variable) {
- cmd->reply = "OOM";
- goto err;
- }
-
- if (ctrl_cmd_send(&bsc->write_queue, bsc_cmd)) {
- cmd->reply = "Sending failed";
- goto err;
- }
- pending->ccon = cmd->ccon;
- pending->ccon->closed_cb = ctrl_conn_closed_cb;
- pending->cmd = cmd;
-
- /* Setup the timeout */
- osmo_timer_setup(&pending->timeout, pending_timeout_cb,
- pending);
- /* TODO: Make timeout configurable */
- osmo_timer_schedule(&pending->timeout, 10, 0);
- llist_add_tail(&pending->list_entry, &bsc->cmd_pending);
-
- goto done;
- }
- }
- /* We end up here if there's no bsc to handle our LAC */
- cmd->reply = "no BSC with this nr";
-err:
- ret = CTRL_CMD_ERROR;
-done:
- talloc_free(bsc_cmd);
- return ret;
-
-}
-
-
-CTRL_CMD_DEFINE(fwd_cmd, "net 0 bsc *");
-static int get_fwd_cmd(struct ctrl_cmd *cmd, void *data)
-{
- return forward_to_bsc(cmd);
-}
-
-static int set_fwd_cmd(struct ctrl_cmd *cmd, void *data)
-{
- return forward_to_bsc(cmd);
-}
-
-static int verify_fwd_cmd(struct ctrl_cmd *cmd, const char *value, void *data)
-{
- return 0;
-}
-
-static int extract_bsc_cfg_variable(struct ctrl_cmd *cmd, struct bsc_config **cfg,
- char **bsc_variable)
-{
- unsigned int nr;
-
- if (!extract_bsc_nr_variable(cmd->variable, &nr, bsc_variable)) {
- cmd->reply = "command incomplete";
- return 0;
- }
-
- *cfg = bsc_config_num(g_nat, nr);
- if (!*cfg) {
- cmd->reply = "Unknown BSC";
- return 0;
- }
-
- return 1;
-}
-
-CTRL_CMD_DEFINE(net_cfg_cmd, "net 0 bsc_cfg *");
-static int get_net_cfg_cmd(struct ctrl_cmd *cmd, void *data)
-{
- char *bsc_variable;
- struct bsc_config *bsc_cfg;
-
- if (!extract_bsc_cfg_variable(cmd, &bsc_cfg, &bsc_variable))
- return CTRL_CMD_ERROR;
-
- if (strcmp(bsc_variable, "access-list-name") == 0) {
- cmd->reply = talloc_asprintf(cmd, "%s",
- bsc_cfg->acc_lst_name ? bsc_cfg->acc_lst_name : "");
- return CTRL_CMD_REPLY;
- }
-
- cmd->reply = "unknown command";
- return CTRL_CMD_ERROR;
-}
-
-static int set_net_cfg_cmd(struct ctrl_cmd *cmd, void *data)
-{
- char *bsc_variable;
- struct bsc_config *bsc_cfg;
-
- if (!extract_bsc_cfg_variable(cmd, &bsc_cfg, &bsc_variable))
- return CTRL_CMD_ERROR;
-
- if (strcmp(bsc_variable, "access-list-name") == 0) {
- osmo_talloc_replace_string(bsc_cfg, &bsc_cfg->acc_lst_name, cmd->value);
- cmd->reply = talloc_asprintf(cmd, "%s",
- bsc_cfg->acc_lst_name ? bsc_cfg->acc_lst_name : "");
- return CTRL_CMD_REPLY;
- } else if (strcmp(bsc_variable, "no-access-list-name") == 0) {
- talloc_free(bsc_cfg->acc_lst_name);
- bsc_cfg->acc_lst_name = NULL;
- cmd->reply = "";
- return CTRL_CMD_REPLY;
- }
-
- cmd->reply = "unknown command";
- return CTRL_CMD_ERROR;
-}
-
-static int verify_net_cfg_cmd(struct ctrl_cmd *cmd, const char *value, void *data)
-{
- return 0;
-}
-
-CTRL_CMD_DEFINE(net_cfg_acc_cmd, "net 0 add allow access-list *");
-static const char *extract_acc_name(const char *var)
-{
- char *str;
-
- str = strstr(var, "net.0.add.allow.access-list.");
- if (!str)
- return NULL;
- str += strlen("net.0.add.allow.access-list.");
- if (strlen(str) == 0)
- return NULL;
- return str;
-}
-
-static int get_net_cfg_acc_cmd(struct ctrl_cmd *cmd, void *data)
-{
- cmd->reply = "Append only";
- return CTRL_CMD_ERROR;
-}
-
-static int set_net_cfg_acc_cmd(struct ctrl_cmd *cmd, void *data)
-{
- const char *access_name = extract_acc_name(cmd->variable);
- struct bsc_msg_acc_lst *acc;
- struct bsc_msg_acc_lst_entry *entry;
- const char *value = cmd->value;
- int rc;
-
- /* Should have been caught by verify_net_cfg_acc_cmd */
- acc = bsc_msg_acc_lst_find(&g_nat->access_lists, access_name);
- if (!acc) {
- cmd->reply = "Access list not found";
- return CTRL_CMD_ERROR;
- }
-
- entry = bsc_msg_acc_lst_entry_create(acc);
- if (!entry) {
- cmd->reply = "OOM";
- return CTRL_CMD_ERROR;
- }
-
- rc = gsm_parse_reg(acc, &entry->imsi_allow_re, &entry->imsi_allow, 1, &value);
- if (rc != 0) {
- cmd->reply = "Failed to compile expression";
- return CTRL_CMD_ERROR;
- }
-
- cmd->reply = "IMSI allow added to access list";
- return CTRL_CMD_REPLY;
-}
-
-static int verify_net_cfg_acc_cmd(struct ctrl_cmd *cmd, const char *value, void *data)
-{
- const char *access_name = extract_acc_name(cmd->variable);
- struct bsc_msg_acc_lst *acc = bsc_msg_acc_lst_find(&g_nat->access_lists, access_name);
-
- if (!acc) {
- cmd->reply = "Access list not known";
- return -1;
- }
-
- return 0;
-}
-
-CTRL_CMD_DEFINE_WO_NOVRF(net_save_cmd, "net 0 save-configuration");
-
-static int set_net_save_cmd(struct ctrl_cmd *cmd, void *data)
-{
- int rc = osmo_vty_save_config_file();
- cmd->reply = talloc_asprintf(cmd, "%d", rc);
- if (!cmd->reply) {
- cmd->reply = "OOM";
- return CTRL_CMD_ERROR;
- }
-
- return CTRL_CMD_REPLY;
-}
-
-struct ctrl_handle *bsc_nat_controlif_setup(struct bsc_nat *nat,
- const char *bind_addr, int port)
-{
- struct ctrl_handle *ctrl;
- int rc;
-
-
- ctrl = bsc_controlif_setup(NULL, bind_addr, OSMO_CTRL_PORT_BSC_NAT);
- if (!ctrl) {
- fprintf(stderr, "Failed to initialize the control interface. Exiting.\n");
- return NULL;
- }
-
- rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_fwd_cmd);
- if (rc) {
- fprintf(stderr, "Failed to install the control command. Exiting.\n");
- goto error;
- }
- rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_net_cfg_cmd);
- if (rc) {
- fprintf(stderr, "Failed to install the net cfg command. Exiting.\n");
- goto error;
- }
- rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_net_cfg_acc_cmd);
- if (rc) {
- fprintf(stderr, "Failed to install the net acc command. Exiting.\n");
- goto error;
- }
- rc = ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_net_save_cmd);
- if (rc) {
- fprintf(stderr, "Failed to install the net save command. Exiting.\n");
- goto error;
- }
-
- g_nat = nat;
- return ctrl;
-
-error:
- osmo_fd_unregister(&ctrl->listen_fd);
- close(ctrl->listen_fd.fd);
- talloc_free(ctrl);
- return NULL;
-}
-
-void bsc_nat_inform_reject(struct bsc_connection *conn, const char *imsi)
-{
- struct ctrl_cmd *cmd;
-
- cmd = ctrl_cmd_create(conn, CTRL_TYPE_TRAP);
- if (!cmd) {
- LOGP(DCTRL, LOGL_ERROR, "Failed to create TRAP command.\n");
- return;
- }
-
- cmd->id = "0";
- cmd->variable = talloc_asprintf(cmd, "net.0.bsc.%d.notification-rejection-v1",
- conn->cfg->nr);
- cmd->reply = talloc_asprintf(cmd, "imsi=%s", imsi);
-
- ctrl_cmd_send_to_all(conn->cfg->nat->ctrl, cmd);
- talloc_free(cmd);
-}