| /* (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 <ares.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/vty/command.h> |
| |
| #include <openbsc/vty.h> |
| #include <openbsc/gtphub.h> |
| |
| /* TODO split GRX ares from sgsn into a separate struct and allow use without |
| * globals. */ |
| #include <openbsc/sgsn.h> |
| extern struct sgsn_instance *sgsn; |
| |
| 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); |
| |
| struct ares_addr_node *server; |
| for (server = sgsn->ares_servers; server; server = server->next) |
| vty_out(vty, " grx-dns-add %s%s", inet_ntoa(server->addr.addr4), 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; |
| } |
| |
| |
| /* Copied from sgsn_vty.h */ |
| DEFUN(cfg_grx_ggsn, cfg_grx_ggsn_cmd, |
| "grx-dns-add A.B.C.D", |
| "Add DNS server\nIPv4 address\n") |
| { |
| struct ares_addr_node *node = talloc_zero(tall_bsc_ctx, struct ares_addr_node); |
| node->family = AF_INET; |
| inet_aton(argv[0], &node->addr.addr4); |
| |
| node->next = sgsn->ares_servers; |
| sgsn->ares_servers = node; |
| 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); |
| install_element(GTPHUB_NODE, &cfg_grx_ggsn_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; |
| } |