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The application must retrieve the necessary SIP message header and body information by copying
it into its own buffer before the next call to gc_GetMetaEvent( ). Once the next
gc_GetMetaEvent( ) call is issued, the message information is no longer available from the
metaevent buffer.
The following pseudo-code illustrates how to extract “OK” and “Failed” responses to OPTIONS
requests from a GCEV_EXTENSION event.
char siphdr[IP_SIP_HDR_MAXLEN];
char AcceptHeader[IP_SIP_HDR_MAXLEN];
char Accept_encodingHeader[IP_SIP_HDR_MAXLEN];
char Accept_languageHeader[IP_SIP_HDR_MAXLEN];
case GCEV_EXTENSION:
if( pextensionBlk->ext_id== IPEXTID_RECEIVEMSG )
{
while ((l_pParm = gc_util_next_parm(pParmBlock, l_pParm )) != 0)
{
int l_mtype= (int)(*( l_pParm ->value_buf));
switch (l_pParm ->set_ID)
{
case IPSET_MSG_SIP:
if(l_pParm ->parm_ID == IPPARM_MSGTYPE)
{
if(l_mtype== IP_MSGTYPE_SIP_OPTIONS_OK)
{
printf("OPTIONS request successful\n");
}
else if (l_mtype== IP_MSGTYPE_SIP_ OPTIONS_FAILED)
{
printf("OPTIONS request failedl\n");
}
}
else if(l_pParm ->parm_ID == PARM_MSG_SIP_RESPONSE_CODE)
{
int *l_RC= (int *) l_pParm ->value_buf;
printf ("Response Code %d \n",*l_RC);
}
case IPSET_SIP_MSGINFO:
switch(l_pParm ->parm_ID)
{
case IPPARM_SIP_HDR:
strncpy(siphdr,(char*)parmp->value_buf,parmp->value_size);
siphdr[parmp->value_size]='\0';
if(!strnicmp(siphdr,"Accept-encoding",strlen("Accept-encoding" )))
{
strcpy(Accept_encodingHeader,siphdr);
}
else if (! strnicmp(siphdr,"Accept-language",strlen("Accept-language")))
{
strcpy(Accept_languageHeader,siphdr);
}
else if (! strnicmp(siphdr,"Accept",strlen("Accept")))
{
strcpy(AcceptHeader,siphdr);
}
…
//(process other headers)
default :
break;
}