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#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/timer.h>
#include "../gtp/pdp.h"
struct ggsn_ctx;
struct pdp_priv_t;
struct sgsn_peer {
struct llist_head entry; /* to be included into ggsn_ctx */
struct ggsn_ctx *ggsn; /* backpointer to ggsn_ctx */
struct in_addr addr; /* Addr of the sgsn peer */
unsigned int gtp_version; /* GTP version */
int remote_restart_ctr; /* Last received Restart Ctr from sgsn peer, -1 == unknown */
/* list of pdp contexts associated with this sgsn */
struct llist_head pdp_list;
/* Sends echo request towards SGSN on expiration. Echo Resp is received
through cb_recovery2(), and echo Req timeout through
cb_conf(GTP_ECHO_REQ, EOF, NULL, cbp); */
struct osmo_timer_list echo_timer;
/* Number of GTP messages in libgtp transmit queue */
unsigned int tx_msgs_queued;
};
struct sgsn_peer *sgsn_peer_allocate(struct ggsn_ctx *ggsn, struct in_addr *ia, unsigned int gtp_version);
void sgsn_peer_add_pdp_priv(struct sgsn_peer *sgsn, struct pdp_priv_t *pdp_priv);
void sgsn_peer_remove_pdp_priv(struct pdp_priv_t *pdp_priv);
void sgsn_echo_timer_start(struct sgsn_peer *sgsn);
void sgsn_echo_timer_stop(struct sgsn_peer *sgsn);
void sgsn_peer_echo_resp(struct sgsn_peer *sgsn, bool timeout);
unsigned int sgsn_peer_drop_all_pdp(struct sgsn_peer *sgsn);
int sgsn_peer_handle_recovery(struct sgsn_peer *sgsn, struct pdp_t *pdp, uint8_t recovery);
#define LOGSGSN(level, sgsn, fmt, args...) { \
char _buf[INET_ADDRSTRLEN]; \
LOGP(DGGSN, level, "SGSN(%s): " fmt, inet_ntop(AF_INET, &sgsn->addr, _buf, sizeof(_buf)), ## args); \
} while (0)
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