void stdinCallback(int fd,short int revent, short int* gotEvents, void* dummy)
{
/* this function gets triggered by the ncurses library upon *any* keystroke
from user (for handling of Ctrl-C and Ctrl-\ see function finish()) */
static int t;
unsigned char c;
char buffer[MAX_BUFFER_LENGTH];
/* call ncurses function wgetch() to read in one user keystroke.
Did not use the wgetstr() function because it blocks until the user#
terminates with a end-of-line (return) key. This prevents the SCTP
library from sending out heartbeats, as well as queuing other callbacks
waiting for this potentially long function to terminate.
*/
c=wgetch(selfWin);
switch (c) {
case ERR:
sctp_shutdown(associationID);
endwin();
break;
/* ascii code for return key is 13 */
case 13:
buf[bufCount++]='\n';
buf[bufCount++]=0;
strcpy(buffer,usrid); /* adds the user ID into buffer */
buffer[usrid_len] = '\0';
strcat(buffer,"# ");
strcat(buffer, (char *)buf); /* adds the contents of buf into buffer */
sctp_send(associationID,
0,
(unsigned char *)buffer, strlen(buffer),
SCTP_GENERIC_PAYLOAD_PROTOCOL_ID,
SCTP_USE_PRIMARY, SCTP_NO_CONTEXT,
SCTP_INFINITE_LIFETIME, SCTP_ORDERED_DELIVERY,
SCTP_BUNDLING_DISABLED);
bufCount=0;
waddch(selfWin,'\n');
wrefresh(selfWin);
t=0;
break;
default:
if (bufCount<MAX_BUFFER_LENGTH);
{
buf[bufCount++]=c;
waddch(selfWin,c);
wrefresh(selfWin);
}
}
}
int
SCTP_shutdown(unsigned int associationID)
{
int result;
if ((result = sctp_shutdown(associationID))!= SCTP_SUCCESS) {
if (result == SCTP_LIBRARY_NOT_INITIALIZED) {
fprintf(stderr, "sctp_shutdown: library not initialized.\n");
} else
if (result == SCTP_ASSOC_NOT_FOUND) {
fprintf(stderr, "sctp_shutdown: association not found.\n");
}
fflush(stderr);
}
return result;
}
static void finish(int sig)
{
waddstr(statusWin," Terminating Monitoring tool...");
/* calls sctp_shutdown() to close the association.
waits for the receipt of the shutdown notification before terminating the program */
if (sctp_shutdown(associationID)==0)
waddstr(statusWin,"successful\n");
else {
waddstr(statusWin,"failed\n");
/* the program should exit here as the shutdownComplete notification will
not be produced in this case */
endwin();
exit(0);
}
wrefresh(statusWin);
}
void stdinCallback(int fd, short int revents, short int* gotEvents, void* dummy)
{
/* This function gets triggered by the ncurses library upon *any* keystroke
from user (for handling of Ctrl-C, see function finish()) */
int key;
static unsigned short outstreamID = 0;
SCTP_AssociationStatus assocStatus;
/* call ncurses function wgetch() to read in one user keystroke.
Did not use the wgetstr() function because it blocks until the user#
terminates with a end-of-line (return) key. This prevents the SCTP
library from sending out heartbeats, as well as queuing other callbacks
waiting for this potentially long function to terminate.
*/
key = wgetch(textWin);
switch (key)
{
case ERR:
sctp_shutdown(associationID);
endwin();
break;
/* ascii code for return key is 13 */
case 13:
case KEY_ENTER:
buffer[bufCount++]='\n';
buffer[bufCount++]=0;
/* Increment the Stream ID by 1 everytime data is sent,
if stream ID = largest stream ID assigned, reset stream ID to 0 */
if (outstreamID == statusUpdate.noOfOutStreams)
outstreamID = 0;
sctp_send(associationID, outstreamID, (unsigned char *)buffer, strlen(buffer),
SCTP_GENERIC_PAYLOAD_PROTOCOL_ID,
SCTP_USE_PRIMARY, SCTP_NO_CONTEXT,
SCTP_INFINITE_LIFETIME, SCTP_ORDERED_DELIVERY,
SCTP_BUNDLING_DISABLED);
/* Update the Outstream ID list in Monitor tool structure */
if (statusUpdate.OutstreamIDList[outstreamID] == -1)
statusUpdate.OutstreamIDList[outstreamID] = outstreamID;
/* Update the current position of OutstreamIDList array */
currOutstreamID = outstreamID;
/* update the display */
ncurses_display_AssocStatus(associationID);
outstreamID ++;
waddch(textWin,'\n');
wrefresh(textWin);
bufCount=0;
break;
case KEY_BACKSPACE:
displayPathDetails = 0;
ncurses_display_PathStatus(associationID);
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
/* ascii code for key '0' is 48, key '1' is 49 and so fro.....
therefore, key - 48 will return the value of the Path ID chosen */
chosenPath = key - 48;
displayPathDetails = 1;
sctp_getAssocStatus(associationID,&assocStatus);
if (chosenPath < assocStatus.numberOfAddresses)
ncurses_display_PathStatus(associationID);
break;
case KEY_RESIZE:
endwin();
initializecurses();
wrefresh(statusWin);
/* Display Functions*/
ncurses_display_AssocStatus(associationID);
ncurses_display_PathStatus(associationID);
break;
default:
if (bufCount<SCTP_MAXIMUM_DATA_LENGTH);
{
buffer[bufCount++]= key;
waddch(textWin, key);
wrefresh(textWin);
}
}
}
