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/**
* @file re_natbd.h NAT Behavior Discovery Using STUN (RFC 5780)
*
* Copyright (C) 2010 Creytiv.com
*/
/** NAT Mapping/Filtering types - See RFC 4787 for definitions */
enum nat_type {
NAT_TYPE_UNKNOWN = 0, /**< Unknown type */
NAT_TYPE_ENDP_INDEP = 1, /**< Endpoint-Independent */
NAT_TYPE_ADDR_DEP = 2, /**< Address-Dependent */
NAT_TYPE_ADDR_PORT_DEP = 3 /**< Address and Port-Dependent */
};
/* Strings */
const char *nat_type_str(enum nat_type type);
/*
* Diagnosing NAT Hairpinning
*/
struct nat_hairpinning;
/**
* Defines the NAT Hairpinning handler
*/
typedef void (nat_hairpinning_h)(int err, bool supported, void *arg);
int nat_hairpinning_alloc(struct nat_hairpinning **nhp,
const struct sa *srv, int proto,
const struct stun_conf *conf,
nat_hairpinning_h *hph, void *arg);
int nat_hairpinning_start(struct nat_hairpinning *nh);
/*
* Determining NAT Mapping Behavior
*/
struct nat_mapping;
/**
* Defines the NAT Mapping handler
*
* @param err Errorcode
* @param type NAT Mapping type
* @param arg Handler argument
*/
typedef void (nat_mapping_h)(int err, enum nat_type map, void *arg);
int nat_mapping_alloc(struct nat_mapping **nmp, const struct sa *laddr,
const struct sa *srv, int proto,
const struct stun_conf *conf,
nat_mapping_h *mh, void *arg);
int nat_mapping_start(struct nat_mapping *nm);
/*
* Determining NAT Filtering Behavior
*/
struct nat_filtering;
/**
* Defines the NAT Filtering handler
*
* @param err Errorcode
* @param type NAT Filtering type
* @param arg Handler argument
*/
typedef void (nat_filtering_h)(int err, enum nat_type filt, void *arg);
int nat_filtering_alloc(struct nat_filtering **nfp, const struct sa *srv,
const struct stun_conf *conf,
nat_filtering_h *fh, void *arg);
int nat_filtering_start(struct nat_filtering *nf);
/*
* Binding Lifetime Discovery
*/
struct nat_lifetime;
/** Defines the NAT lifetime interval */
struct nat_lifetime_interval {
uint32_t min; /**< Minimum lifetime interval in [seconds] */
uint32_t cur; /**< Current lifetime interval in [seconds] */
uint32_t max; /**< Maximum lifetime interval in [seconds] */
};
/**
* Defines the NAT Lifetime handler
*
* @param err Errorcode
* @param i NAT Lifetime intervals
* @param arg Handler argument
*/
typedef void (nat_lifetime_h)(int err, const struct nat_lifetime_interval *i,
void *arg);
int nat_lifetime_alloc(struct nat_lifetime **nlp, const struct sa *srv,
uint32_t interval, const struct stun_conf *conf,
nat_lifetime_h *lh, void *arg);
int nat_lifetime_start(struct nat_lifetime *nl);
/*
* Detecting Generic ALGs
*/
struct nat_genalg;
/**
* Defines the NAT Generic ALG handler
*
* @param err Errorcode
* @param errcode STUN Error code (if set)
* @param status Generic ALG status (-1=not detected, 1=detected)
* @param map Mapped network address
* @param arg Handler argument
*/
typedef void (nat_genalg_h)(int err, uint16_t scode, const char *reason,
int status, const struct sa *map, void *arg);
int nat_genalg_alloc(struct nat_genalg **ngp, const struct sa *srv, int proto,
const struct stun_conf *conf,
nat_genalg_h *gh, void *arg);
int nat_genalg_start(struct nat_genalg *ng);
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