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/* (C) 2015 by sysmocom s.f.m.c. GmbH
* All Rights Reserved
*
* Author: Neels Hofmeyr
*
* 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 <string.h>
#include <osmocom/core/talloc.h>
#include <osmocom/vty/command.h>
#include <openbsc/vty.h>
#include <openbsc/gtphub.h>
static struct gtphub_cfg *g_cfg = 0;
static struct cmd_node gtphub_node = {
GTPHUB_NODE,
"%s(config-gtphub)# ",
1,
};
#define GTPH_DEFAULT_CONTROL_PORT 2123
#define GTPH_DEFAULT_USER_PORT 2152
static void write_addrs(struct vty *vty, const char *name,
struct gtphub_cfg_addr *c, struct gtphub_cfg_addr *u)
{
if ((c->port == GTPH_DEFAULT_CONTROL_PORT)
&& (u->port == GTPH_DEFAULT_USER_PORT)
&& (strcmp(c->addr_str, u->addr_str) == 0)) {
/* Default port numbers and same IP address: write "short"
* variant. */
vty_out(vty, " %s %s%s",
name,
c->addr_str,
VTY_NEWLINE);
return;
}
vty_out(vty, " %s ctrl %s %d user %s %d%s",
name,
c->addr_str, (int)c->port,
u->addr_str, (int)u->port,
VTY_NEWLINE);
}
static int config_write_gtphub(struct vty *vty)
{
vty_out(vty, "gtphub%s", VTY_NEWLINE);
write_addrs(vty, "bind-to-sgsns",
&g_cfg->to_sgsns[GTPH_PLANE_CTRL].bind,
&g_cfg->to_sgsns[GTPH_PLANE_USER].bind);
write_addrs(vty, "bind-to-ggsns",
&g_cfg->to_ggsns[GTPH_PLANE_CTRL].bind,
&g_cfg->to_ggsns[GTPH_PLANE_USER].bind);
if (g_cfg->ggsn_proxy[GTPH_PLANE_CTRL].addr_str) {
write_addrs(vty, "ggsn-proxy",
&g_cfg->ggsn_proxy[GTPH_PLANE_CTRL],
&g_cfg->ggsn_proxy[GTPH_PLANE_USER]);
}
return CMD_SUCCESS;
}
DEFUN(cfg_gtphub, cfg_gtphub_cmd,
"gtphub",
"Configure the GTP hub")
{
vty->node = GTPHUB_NODE;
return CMD_SUCCESS;
}
#define BIND_ARGS "ctrl ADDR <0-65535> user ADDR <0-65535>"
#define BIND_DOCS \
"Set GTP-C bind\n" \
"GTP-C local IP address (v4 or v6)\n" \
"GTP-C local port\n" \
"Set GTP-U bind\n" \
"GTP-U local IP address (v4 or v6)\n" \
"GTP-U local port\n"
DEFUN(cfg_gtphub_bind_to_sgsns_short, cfg_gtphub_bind_to_sgsns_short_cmd,
"bind-to-sgsns ADDR",
"GTP Hub Parameters\n"
"Set the local bind address to listen for SGSNs, for both GTP-C and GTP-U\n"
"Local IP address (v4 or v6)\n"
)
{
int i;
for (i = 0; i < GTPH_PLANE_N; i++)
g_cfg->to_sgsns[i].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->to_sgsns[GTPH_PLANE_CTRL].bind.port = GTPH_DEFAULT_CONTROL_PORT;
g_cfg->to_sgsns[GTPH_PLANE_USER].bind.port = GTPH_DEFAULT_USER_PORT;
return CMD_SUCCESS;
}
DEFUN(cfg_gtphub_bind_to_ggsns_short, cfg_gtphub_bind_to_ggsns_short_cmd,
"bind-to-ggsns ADDR",
"GTP Hub Parameters\n"
"Set the local bind address to listen for GGSNs, for both GTP-C and GTP-U\n"
"Local IP address (v4 or v6)\n"
)
{
int i;
for (i = 0; i < GTPH_PLANE_N; i++)
g_cfg->to_ggsns[i].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->to_ggsns[GTPH_PLANE_CTRL].bind.port = GTPH_DEFAULT_CONTROL_PORT;
g_cfg->to_ggsns[GTPH_PLANE_USER].bind.port = GTPH_DEFAULT_USER_PORT;
return CMD_SUCCESS;
}
static int handle_binds(struct gtphub_cfg_bind *b, const char **argv)
{
b[GTPH_PLANE_CTRL].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
b[GTPH_PLANE_CTRL].bind.port = atoi(argv[1]);
b[GTPH_PLANE_USER].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[2]);
b[GTPH_PLANE_USER].bind.port = atoi(argv[3]);
return CMD_SUCCESS;
}
DEFUN(cfg_gtphub_bind_to_sgsns, cfg_gtphub_bind_to_sgsns_cmd,
"bind-to-sgsns " BIND_ARGS,
"GTP Hub Parameters\n"
"Set the local bind addresses and ports to listen for SGSNs\n"
BIND_DOCS
)
{
return handle_binds(g_cfg->to_sgsns, argv);
}
DEFUN(cfg_gtphub_bind_to_ggsns, cfg_gtphub_bind_to_ggsns_cmd,
"bind-to-ggsns " BIND_ARGS,
"GTP Hub Parameters\n"
"Set the local bind addresses and ports to listen for GGSNs\n"
BIND_DOCS
)
{
return handle_binds(g_cfg->to_ggsns, argv);
}
DEFUN(cfg_gtphub_ggsn_proxy_short, cfg_gtphub_ggsn_proxy_short_cmd,
"ggsn-proxy ADDR",
"GTP Hub Parameters\n"
"Redirect all GGSN bound traffic to default ports on this address (another gtphub)\n"
"Remote IP address (v4 or v6)\n"
)
{
g_cfg->ggsn_proxy[GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->ggsn_proxy[GTPH_PLANE_CTRL].port = GTPH_DEFAULT_CONTROL_PORT;
g_cfg->ggsn_proxy[GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->ggsn_proxy[GTPH_PLANE_USER].port = GTPH_DEFAULT_USER_PORT;
return CMD_SUCCESS;
}
DEFUN(cfg_gtphub_ggsn_proxy, cfg_gtphub_ggsn_proxy_cmd,
"ggsn-proxy " BIND_ARGS,
"GTP Hub Parameters\n"
"Redirect all GGSN bound traffic to these addresses and ports (another gtphub)\n"
BIND_DOCS
)
{
g_cfg->ggsn_proxy[GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->ggsn_proxy[GTPH_PLANE_CTRL].port = atoi(argv[1]);
g_cfg->ggsn_proxy[GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[2]);
g_cfg->ggsn_proxy[GTPH_PLANE_USER].port = atoi(argv[3]);
return CMD_SUCCESS;
}
DEFUN(cfg_gtphub_sgsn_proxy_short, cfg_gtphub_sgsn_proxy_short_cmd,
"sgsn-proxy ADDR",
"GTP Hub Parameters\n"
"Redirect all SGSN bound traffic to default ports on this address (another gtphub)\n"
"Remote IP address (v4 or v6)\n"
)
{
g_cfg->sgsn_proxy[GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->sgsn_proxy[GTPH_PLANE_CTRL].port = GTPH_DEFAULT_CONTROL_PORT;
g_cfg->sgsn_proxy[GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->sgsn_proxy[GTPH_PLANE_USER].port = GTPH_DEFAULT_USER_PORT;
return CMD_SUCCESS;
}
DEFUN(cfg_gtphub_sgsn_proxy, cfg_gtphub_sgsn_proxy_cmd,
"sgsn-proxy " BIND_ARGS,
"GTP Hub Parameters\n"
"Redirect all SGSN bound traffic to these addresses and ports (another gtphub)\n"
BIND_DOCS
)
{
g_cfg->sgsn_proxy[GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]);
g_cfg->sgsn_proxy[GTPH_PLANE_CTRL].port = atoi(argv[1]);
g_cfg->sgsn_proxy[GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[2]);
g_cfg->sgsn_proxy[GTPH_PLANE_USER].port = atoi(argv[3]);
return CMD_SUCCESS;
}
DEFUN(show_gtphub, show_gtphub_cmd, "show gtphub",
SHOW_STR "Display information about the GTP hub")
{
vty_out(vty, "gtphub has nothing to say yet%s", VTY_NEWLINE);
return CMD_SUCCESS;
}
int gtphub_vty_init(void)
{
install_element_ve(&show_gtphub_cmd);
install_element(CONFIG_NODE, &cfg_gtphub_cmd);
install_node(>phub_node, config_write_gtphub);
vty_install_default(GTPHUB_NODE);
install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_sgsns_short_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_sgsns_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_ggsns_short_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_ggsns_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_ggsn_proxy_short_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_ggsn_proxy_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_proxy_short_cmd);
install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_proxy_cmd);
return 0;
}
int gtphub_cfg_read(struct gtphub_cfg *cfg, const char *config_file)
{
int rc;
g_cfg = cfg;
rc = vty_read_config_file(config_file, NULL);
if (rc < 0) {
fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file);
return rc;
}
return 0;
}
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