include/net/sctp/sctp.h

Source file repositories/reference/linux-study-clean/include/net/sctp/sctp.h

File Facts

System
Linux kernel
Corpus path
include/net/sctp/sctp.h
Extension
.h
Size
20472 bytes
Lines
672
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

struct sctp_mib {
        unsigned long   mibs[SCTP_MIB_MAX];
};

/* helper function to track stats about max rto and related transport */
static inline void sctp_max_rto(struct sctp_association *asoc,
				struct sctp_transport *trans)
{
	if (asoc->stats.max_obs_rto < (__u64)trans->rto) {
		asoc->stats.max_obs_rto = trans->rto;
		memset(&asoc->stats.obs_rto_ipaddr, 0,
			sizeof(struct sockaddr_storage));
		memcpy(&asoc->stats.obs_rto_ipaddr, &trans->ipaddr,
			trans->af_specific->sockaddr_len);
	}
}

/*
 * Macros for keeping a global reference of object allocations.
 */
#ifdef CONFIG_SCTP_DBG_OBJCNT

extern atomic_t sctp_dbg_objcnt_sock;
extern atomic_t sctp_dbg_objcnt_ep;
extern atomic_t sctp_dbg_objcnt_assoc;
extern atomic_t sctp_dbg_objcnt_transport;
extern atomic_t sctp_dbg_objcnt_chunk;
extern atomic_t sctp_dbg_objcnt_bind_addr;
extern atomic_t sctp_dbg_objcnt_bind_bucket;
extern atomic_t sctp_dbg_objcnt_addr;
extern atomic_t sctp_dbg_objcnt_datamsg;
extern atomic_t sctp_dbg_objcnt_keys;

/* Macros to atomically increment/decrement objcnt counters.  */
#define SCTP_DBG_OBJCNT_INC(name) \
atomic_inc(&sctp_dbg_objcnt_## name)
#define SCTP_DBG_OBJCNT_DEC(name) \
atomic_dec(&sctp_dbg_objcnt_## name)
#define SCTP_DBG_OBJCNT(name) \
atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)

/* Macro to help create new entries in the global array of
 * objcnt counters.
 */
#define SCTP_DBG_OBJCNT_ENTRY(name) \
{.label= #name, .counter= &sctp_dbg_objcnt_## name}

void sctp_dbg_objcnt_init(struct net *);

#else

#define SCTP_DBG_OBJCNT_INC(name)
#define SCTP_DBG_OBJCNT_DEC(name)

static inline void sctp_dbg_objcnt_init(struct net *net) { return; }

#endif /* CONFIG_SCTP_DBG_OBJCNT */

#if defined CONFIG_SYSCTL
void sctp_sysctl_register(void);
void sctp_sysctl_unregister(void);
int sctp_sysctl_net_register(struct net *net);
void sctp_sysctl_net_unregister(struct net *net);
#else
static inline void sctp_sysctl_register(void) { return; }
static inline void sctp_sysctl_unregister(void) { return; }
static inline int sctp_sysctl_net_register(struct net *net) { return 0; }
static inline void sctp_sysctl_net_unregister(struct net *net) { return; }
#endif

/* Size of Supported Address Parameter for 'x' address types. */
#define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))

#if IS_ENABLED(CONFIG_IPV6)

void sctp_v6_pf_init(void);
void sctp_v6_pf_exit(void);
int sctp_v6_protosw_init(void);
void sctp_v6_protosw_exit(void);
int sctp_v6_add_protocol(void);
void sctp_v6_del_protocol(void);

#else /* #ifdef defined(CONFIG_IPV6) */

static inline void sctp_v6_pf_init(void) { return; }
static inline void sctp_v6_pf_exit(void) { return; }
static inline int sctp_v6_protosw_init(void) { return 0; }
static inline void sctp_v6_protosw_exit(void) { return; }
static inline int sctp_v6_add_protocol(void) { return 0; }
static inline void sctp_v6_del_protocol(void) { return; }

Annotation

Implementation Notes