session.c File Reference

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Detailed Description

CDiameterPeer Session Handling.

Author:

Dragos Vingarzan vingarzan -at- fokus dot fraunhofer dot de

Definition in file session.c.

#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include "session.h"
#include "diameter.h"
#include "config.h"

Go to the source code of this file.

Functions
int	session_init ()
	Initializes the session related structures.
int	session_destroy ()
	Destroys the session related structures.
static int	generate_sessionID (str *sID, unsigned int end_pad_len)
AAASessionId	AAACreateSession ()
	Creates a AAASessionId.
int	AAADropSession (AAASessionId *s)
	Deallocates the memory taken by a AAASessionId.
Variables
dp_config *	config
	Configuration for this diameter peer.
gen_lock_t *	session_lock
	lock for session operation
unsigned int *	session_id1
	first part of the session id
unsigned int *	session_id2
	second part of the session id

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Function Documentation

int session_init

(

)

Initializes the session related structures.

Definition at line 72 of file session.c.

References LOG_NO_MEM, session_id1, session_id2, and session_lock.

Referenced by diameter_peer_init().

{
    session_lock = lock_alloc();
    if (!session_lock){
        LOG_NO_MEM("lock",sizeof(gen_lock_t));
        goto error;
    }
    session_lock = lock_init(session_lock);
    session_id1 = shm_malloc(sizeof(unsigned int));
    if (!session_id1){
        LOG_NO_MEM("shm",sizeof(unsigned int));
        goto error;
    }
    session_id2 = shm_malloc(sizeof(unsigned int));
    if (!session_id2){
        LOG_NO_MEM("shm",sizeof(unsigned int));
        goto error;
    }
    srand((unsigned int)time(0));   
    *session_id1 = rand();
    *session_id1 <<= 16;
    *session_id1 += time(0)&0xFFFF;
    *session_id2 = 0;
    return 1;
error:
    return 0;
}

int session_destroy

(

)

Destroys the session related structures.

Definition at line 103 of file session.c.

References session_id1, session_id2, and session_lock.

Referenced by diameter_peer_destroy().

{
    lock_get(session_lock);
    lock_destroy(session_lock);
    lock_dealloc((void*)session_lock);  
    shm_free(session_id1);
    shm_free(session_id2);
    return 1;
}

static int generate_sessionID	(	str *	sID,
		unsigned int	end_pad_len
	)			[static]

Definition at line 119 of file session.c.

References config, dp_config::identity, session_id1, session_id2, and session_lock.

Referenced by AAACreateSession().

{
    unsigned int s2;

    /* some checks */
    if (!sID)
        goto error;

    /* compute id's len */
    sID->len = config->identity.len +
        1/*;*/ + 10/*high 32 bits*/ +
        1/*;*/ + 10/*low 32 bits*/ +
//      1/*;*/ + 8/*optional value*/ +
        1 /* terminating \0 */ +
        end_pad_len;

    /* get some memory for it */
    sID->s = (char*)shm_malloc( sID->len );
    if (sID->s==0) {
        LOG(L_ERR,"ERROR:generate_sessionID: no more free memory!\n");
        goto error;
    }

    lock_get(session_lock);
    s2 = *session_id2 +1;
    *session_id2 = s2;
    lock_release(session_lock);
    
    /* build the sessionID */
    sprintf(sID->s,"%.*s;%u;%u",config->identity.len,config->identity.s,*session_id1,s2);
    sID->len = strlen(sID->s);
    return 1;
error:
    return -1;
}

AAASessionId AAACreateSession

(

)

Creates a AAASessionId.

Returns:

the new AAASessionId or an empty string on failure

Definition at line 166 of file session.c.

References generate_sessionID().

Referenced by load_cdp().

{
    AAASessionId sID={0,0};
    
    /* generates a new session-ID - the extra pad is used to append to 
     * session-ID the hash-code and label of the session ".XXXXXXXX.XXXXXXXX"*/
    if (generate_sessionID( &(sID), 0 )!=1)
        goto error;

    return sID;
error:
    LOG(L_ERR,"ERROR:AAACreateSession(): Error on new session generation\n");
    return sID;
}

int AAADropSession

(

AAASessionId *

s

)

Deallocates the memory taken by a AAASessionId.

Parameters:

s

- the AAASessionId to be deallocated

Definition at line 185 of file session.c.

References AAA_ERR_SUCCESS.

Referenced by load_cdp().

{
    if (s->s) shm_free(s->s);
    s->s =0;
    s->len=0;
    return AAA_ERR_SUCCESS;
}

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Variable Documentation

dp_config* config

Configuration for this diameter peer.

Definition at line 76 of file diameter_peer.c.

gen_lock_t* session_lock

lock for session operation

Definition at line 65 of file session.c.

Referenced by generate_sessionID(), session_destroy(), and session_init().

unsigned int* session_id1

first part of the session id

Definition at line 66 of file session.c.

Referenced by generate_sessionID(), session_destroy(), and session_init().

unsigned int* session_id2

second part of the session id

Definition at line 67 of file session.c.

Referenced by generate_sessionID(), session_destroy(), and session_init().

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