/*
* Private data for capturing on Septel devices.
*/
struct pcap_septel {
struct pcap_stat stat;
}
/*
* Read at most max_packets from the capture queue and call the callback
* for each of them. Returns the number of packets handled, -1 if an
* error occured, or -2 if we were told to break out of the loop.
*/
static int septel_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
struct pcap_septel *ps = p->priv;
HDR *h;
MSG *m;
int processed = 0 ;
int t = 0 ;
/* identifier for the message queue of the module(upe) from which we are capturing
* packets.These IDs are defined in system.txt . By default it is set to 0x2d
* so change it to 0xdd for technical reason and therefore the module id for upe becomes:
* LOCAL 0xdd * upe - Example user part task */
unsigned int id = 0xdd;
/* process the packets */
do {
unsigned short packet_len = 0;
int caplen = 0;
int counter = 0;
struct pcap_pkthdr pcap_header;
u_char *dp ;
/*
* Has "pcap_breakloop()" been called?
*/
loop:
if (p->break_loop) {
/*
* Yes - clear the flag that indicates that
* it has, and return -2 to indicate that
* we were told to break out of the loop.
*/
p->break_loop = 0;
return -2;
}
/*repeat until a packet is read
*a NULL message means :
* when no packet is in queue or all packets in queue already read */
do {
/* receive packet in non-blocking mode
* GCT_grab is defined in the septel library software */
h = GCT_grab(id);
m = (MSG*)h;
/* a couter is added here to avoid an infinite loop
* that will cause our capture program GUI to freeze while waiting
* for a packet*/
counter++ ;
}
while ((m == NULL)&& (counter< 100)) ;
if (m != NULL) {
t = h->type ;
/* catch only messages with type = 0xcf00 or 0x8f01 corrsponding to ss7 messages*/
/* XXX = why not use API_MSG_TX_REQ for 0xcf00 and API_MSG_RX_IND
* for 0x8f01? */
if ((t != 0xcf00) && (t != 0x8f01)) {
relm(h);
goto loop ;
}
/* XXX - is API_MSG_RX_IND for an MTP2 or MTP3 message? */
dp = get_param(m);/* get pointer to MSG parameter area (m->param) */
packet_len = m->len;
caplen = p->snapshot ;
if (caplen > packet_len) {
caplen = packet_len;
}
/* Run the packet filter if there is one. */
if ((p->fcode.bf_insns == NULL) || bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen)) {
/* get a time stamp , consisting of :
*
* pcap_header.ts.tv_sec:
* ----------------------
* a UNIX format time-in-seconds when he packet was captured,
* i.e. the number of seconds since Epoch time (January 1,1970, 00:00:00 GMT)
*
* pcap_header.ts.tv_usec :
* ------------------------
* the number of microseconds since that second
* when the packet was captured
*/
(void)gettimeofday(&pcap_header.ts, NULL);
/* Fill in our own header data */
pcap_header.caplen = caplen;
pcap_header.len = packet_len;
/* Count the packet. */
ps->stat.ps_recv++;
/* Call the user supplied callback function */
callback(user, &pcap_header, dp);
processed++ ;
}
/* after being processed the packet must be
*released in order to receive another one */
relm(h);
}else
processed++;
}
while (processed < cnt) ;
return processed ;
}
/*
*******************************************************************************
* *
* Main program loop *
* *
*******************************************************************************
*/
int intu_ent()
{
HDR *h; /* Received message */
DLG_CB *dlg; /* The control block for the dlg id of the received msg */
u16 i; /* loop counter */
u16 min_rev; /* INAP API major revision number */
u16 maj_rev; /* INAP API major revision number */
char *ident_text; /* INAP API name in text */
if (num_dialogues > DEFAULT_NUM_DIALOGUES)
{
fprintf(stderr, "intu() : Not enough dialogue resources available\n");
fprintf(stderr, " 0x%04x available, 0x%04x requested\n",
DEFAULT_NUM_DIALOGUES,
num_dialogues);
return(0);
}
/*
* Print banner so we know what's running:
*/
printf(
"INTU: Example INAP application (C) Dialogic Corporation 1997-2010. All Rights Reserved.\n");
printf(
"=======================================================================================\n\n");
if (IN_version(&maj_rev, &min_rev, &ident_text) == IN_SUCCESS);
printf("%s Version %i.%i\n",ident_text, maj_rev, min_rev);
printf("INTU module ID - 0x%02x \nINAP module ID - 0x%02x\n",
intu_mod_id, inap_mod_id);
printf("Number of dialogues - 0x%04x (%i) \nBase dialogue ID - 0x%04x\n",
num_dialogues, num_dialogues, base_dialogue_id);
printf("Options set - 0x%04x \n\n", intu_options);
/*
* Initialise the per-dialogue resources:
*/
for (i=0; i<DEFAULT_NUM_DIALOGUES; i++)
{
dlg = &dlg_data[i];
dlg->state = INTU_STATE_IDLE;
dlg->reply_prepared = INTU_REPLY_NONE;
/*
* dlg->cpt intialised when we receive the open indication
*/
}
/*
* Now enter main loop, receiving messages as
* they become available and processing accordingly:
*/
finished = 0;
while (!finished)
{
/*
* GCT_receive will attempt to receive message
* from the tasks message queue and block until
* a message is ready:
*/
if ((h = GCT_receive(intu_mod_id)) != 0)
{
switch (h->type)
{
case INAP_MSG_SRV_IND :
INTU_srv_ind(h);
break;
case INAP_MSG_DLG_IND :
INTU_dlg_ind(h);
break;
default :
INTU_disp_other_msg(h);
break;
}
/*
* Once we have finished processing the message
* it must be released to the pool of messages.
*/
relm(h);
}
}
return(0);
}
