| #pragma once |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <osmocom/core/utils.h> |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/timer.h> |
| #include <osmocom/ctrl/control_if.h> |
| |
| #include "../lib/tun.h" |
| #include "../lib/ippool.h" |
| #include "../lib/syserr.h" |
| #include "../lib/in46_addr.h" |
| #include "../gtp/gtp.h" |
| |
| #include "sgsn.h" |
| |
| #define APN_TYPE_IPv4 0x01 /* v4-only */ |
| #define APN_TYPE_IPv6 0x02 /* v6-only */ |
| #define APN_TYPE_IPv4v6 0x04 /* v4v6 dual-stack */ |
| |
| struct ggsn_ctx; |
| |
| struct apn_ctx_ip { |
| struct { |
| struct in46_prefix ifconfig_prefix; |
| struct in46_prefix ll_prefix; |
| struct in46_prefix static_prefix; |
| struct in46_prefix dynamic_prefix; |
| /* v4 DNS server names */ |
| struct in46_addr dns[2]; |
| } cfg; |
| |
| /* v4 address pool */ |
| struct ippool_t *pool; |
| }; |
| |
| struct apn_name { |
| struct llist_head list; |
| char *name; |
| }; |
| |
| enum apn_gtpu_mode { |
| APN_GTPU_MODE_TUN = 0, /* default */ |
| APN_GTPU_MODE_KERNEL_GTP, |
| }; |
| |
| struct apn_ctx { |
| /* list of APNs inside GGSN */ |
| struct llist_head list; |
| /* back-pointer to GGSN */ |
| struct ggsn_ctx *ggsn; |
| |
| bool started; |
| |
| struct { |
| /* Primary name */ |
| char *name; |
| /* Description string */ |
| char *description; |
| /* List of secondary APN names */ |
| struct llist_head name_list; |
| /* types supported address types on this APN */ |
| uint32_t apn_type_mask; |
| /* GTP-U via TUN device or in Linux kernel */ |
| enum apn_gtpu_mode gtpu_mode; |
| /* administratively shut-down (true) or not (false) */ |
| bool shutdown; |
| /* transmit G-PDU sequeence numbers (true) or not (false) */ |
| bool tx_gpdu_seq; |
| } cfg; |
| |
| /* corresponding tun device */ |
| struct { |
| struct { |
| /* name of the network device */ |
| char *dev_name; |
| /* ip-up and ip-down script names/paths */ |
| char *ipup_script; |
| char *ipdown_script; |
| } cfg; |
| struct tun_t *tun; |
| struct osmo_fd fd; |
| } tun; |
| |
| /* ipv6 link-local address */ |
| struct in6_addr v6_lladdr; |
| |
| struct apn_ctx_ip v4; |
| struct apn_ctx_ip v6; |
| }; |
| |
| struct pdp_priv_t { |
| struct pdp_t *lib; /* pointer to libgtp associated pdp_t instance */ |
| struct sgsn_peer *sgsn; |
| struct apn_ctx *apn; |
| struct llist_head entry; /* to be included into sgsn_peer */ |
| /* struct ggsn_ctx can be reached through lib->gsn->priv, or through sgsn->ggsn */ |
| }; |
| |
| struct ggsn_ctx { |
| /* global list of GGSNs */ |
| struct llist_head list; |
| |
| /* list of APNs in this GGSN */ |
| struct llist_head apn_list; |
| |
| /* list of SGSN peers (struct sgsn_peer) in this GGSN. TODO: hash table with key <ip+port>? */ |
| struct llist_head sgsn_list; |
| |
| bool started; |
| |
| struct { |
| char *name; |
| /* Description string */ |
| char *description; |
| /* an APN that shall be used as default for any non-matching APN */ |
| struct apn_ctx *default_apn; |
| /* ADdress to which we listen for GTP */ |
| struct in46_addr listen_addr; |
| /* Local GTP-C address advertised in GTP */ |
| struct in46_addr gtpc_addr; |
| /* Local GTP-U address advertised in GTP */ |
| struct in46_addr gtpu_addr; |
| /* directory for state file */ |
| char *state_dir; |
| /* Time between Echo requests on each SGSN */ |
| unsigned int echo_interval; |
| /* administratively shut-down (true) or not (false) */ |
| bool shutdown; |
| } cfg; |
| |
| /* The libgtp (G)GSN instance, i.e. what listens to GTP */ |
| struct gsn_t *gsn; |
| |
| /* osmo-fd for gsn */ |
| struct osmo_fd gtp_fd0; |
| struct osmo_fd gtp_fd1c; |
| struct osmo_fd gtp_fd1u; |
| }; |
| |
| /* ggsn_vty.c */ |
| extern struct llist_head g_ggsn_list; |
| extern struct vty_app_info g_vty_info; |
| extern int ggsn_vty_init(void); |
| struct ggsn_ctx *ggsn_find(const char *name); |
| struct ggsn_ctx *ggsn_find_or_create(void *ctx, const char *name); |
| struct apn_ctx *ggsn_find_apn(struct ggsn_ctx *ggsn, const char *name); |
| struct apn_ctx *ggsn_find_or_create_apn(struct ggsn_ctx *ggsn, const char *name); |
| |
| /* ggsn_main.c */ |
| extern struct ctrl_handle *g_ctrlh; |
| extern void *tall_ggsn_ctx; |
| |
| /* ggsn.c */ |
| extern int ggsn_start(struct ggsn_ctx *ggsn); |
| extern int ggsn_stop(struct ggsn_ctx *ggsn); |
| extern int apn_start(struct apn_ctx *apn); |
| extern int apn_stop(struct apn_ctx *apn); |
| void ggsn_close_one_pdp(struct pdp_t *pdp); |
| |
| #define LOGPAPN(level, apn, fmt, args...) \ |
| LOGP(DGGSN, level, "APN(%s): " fmt, (apn)->cfg.name, ## args) |
| |
| #define LOGPGGSN(level, ggsn, fmt, args...) \ |
| LOGP(DGGSN, level, "GGSN(%s): " fmt, (ggsn)->cfg.name, ## args) |
| |
| #define LOGPPDP(level, pdp, fmt, args...) LOGPDPX(DGGSN, level, pdp, fmt, ## args) |
| |
| #define LOGTUN(level, tun, fmt, args...) \ |
| LOGP(DTUN, level, "TUN(%s): " fmt, (tun)->devname, ## args) |