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README	3.32 KB	-rw-r--r--
asn1.h	18.14 KB	-rw-r--r--
callback.h	2.66 KB	-rw-r--r--
cert_util.h	8.07 KB	-rw-r--r--
check_varbind.h	1.96 KB	-rw-r--r--
container.h	15.84 KB	-rw-r--r--
container_binary_array.h	1.01 KB	-rw-r--r--
container_iterator.h	2.4 KB	-rw-r--r--
container_list_ssll.h	479 B	-rw-r--r--
container_null.h	338 B	-rw-r--r--
data_list.h	3.66 KB	-rw-r--r--
default_store.h	9.6 KB	-rw-r--r--
dir_utils.h	1.91 KB	-rw-r--r--
factory.h	1.52 KB	-rw-r--r--
fd_event_manager.h	5.27 KB	-rw-r--r--
file_utils.h	2.17 KB	-rw-r--r--
getopt.h	454 B	-rw-r--r--
int64.h	1.53 KB	-rw-r--r--
keytools.h	2.01 KB	-rw-r--r--
large_fd_set.h	5.29 KB	-rw-r--r--
lcd_time.h	3.99 KB	-rw-r--r--
md5.h	2.64 KB	-rw-r--r--
mib.h	23.69 KB	-rw-r--r--
mt_support.h	1.95 KB	-rw-r--r--
oid.h	335 B	-rw-r--r--
oid_stash.h	3 KB	-rw-r--r--
parse.h	8.72 KB	-rw-r--r--
read_config.h	6.32 KB	-rw-r--r--
scapi.h	4.05 KB	-rw-r--r--
snmp-tc.h	1.83 KB	-rw-r--r--
snmp.h	13.34 KB	-rw-r--r--
snmpAliasDomain.h	678 B	-rw-r--r--
snmpCallbackDomain.h	2.81 KB	-rw-r--r--
snmpDTLSUDPDomain.h	854 B	-rw-r--r--
snmpIPv4BaseDomain.h	875 B	-rw-r--r--
snmpIPv6BaseDomain.h	785 B	-rw-r--r--
snmpSocketBaseDomain.h	501 B	-rw-r--r--
snmpTCPBaseDomain.h	506 B	-rw-r--r--
snmpTCPDomain.h	838 B	-rw-r--r--
snmpTCPIPv6Domain.h	774 B	-rw-r--r--
snmpTLSBaseDomain.h	2.88 KB	-rw-r--r--
snmpTLSTCPDomain.h	806 B	-rw-r--r--
snmpUDPBaseDomain.h	1.29 KB	-rw-r--r--
snmpUDPDomain.h	1.7 KB	-rw-r--r--
snmpUDPIPv4BaseDomain.h	1.13 KB	-rw-r--r--
snmpUDPIPv6Domain.h	1.66 KB	-rw-r--r--
snmpUnixDomain.h	1.58 KB	-rw-r--r--
snmp_alarm.h	2.4 KB	-rw-r--r--
snmp_api.h	28.75 KB	-rw-r--r--
snmp_assert.h	3.74 KB	-rw-r--r--
snmp_client.h	5.68 KB	-rw-r--r--
snmp_debug.h	8.75 KB	-rw-r--r--
snmp_enum.h	4.15 KB	-rw-r--r--
snmp_impl.h	4.46 KB	-rw-r--r--
snmp_logging.h	3.84 KB	-rw-r--r--
snmp_parse_args.h	2.95 KB	-rw-r--r--
snmp_secmod.h	5.79 KB	-rw-r--r--
snmp_service.h	813 B	-rw-r--r--
snmp_transport.h	9.67 KB	-rw-r--r--
snmptsm.h	901 B	-rw-r--r--
snmpusm.h	12.11 KB	-rw-r--r--
snmpv3-security-includes.h	157 B	-rw-r--r--
snmpv3.h	2.22 KB	-rw-r--r--
system.h	7.08 KB	-rw-r--r--
text_utils.h	3.4 KB	-rw-r--r--
tools.h	10.02 KB	-rw-r--r--
transform_oids.h	1.17 KB	-rw-r--r--
types.h	1.89 KB	-rw-r--r--
ucd_compat.h	1.18 KB	-rw-r--r--
vacm.h	8.6 KB	-rw-r--r--
winpipe.h	1.71 KB	-rw-r--r--
winservice.h	3.52 KB	-rw-r--r--

Code Editor : fd_event_manager.h

/**************************************************************************
 * UNIT: File Descriptor (FD) Event Manager
 *
 * OVERVIEW: This unit contains functions to register a FD with the FD
 *           event manager for callbacks when activity is received on that
 *           FD.  Notification of read, write, and exception activity can 
 *           all be registered for individually.  Once a registered FD is
 *           closed by the user, the FD must be unregistered.  To use
 *           the FD Event manager you need to make calls to 
 *           netsnmp_external_event_info() and 
 *           netsnmp_dispatch_external_events() in your event loop to receive
 *           callbacks for registered events.  See snmpd.c and snmptrapd.c 
 *           for examples.
 *
 * LIMITATIONS:
 **************************************************************************/
#ifndef FD_EVENT_MANAGER_H
#define FD_EVENT_MANAGER_H

#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

#ifdef __cplusplus
extern          "C" {
#endif

#define NUM_EXTERNAL_FDS 32
#define FD_REGISTERED_OK                 0
#define FD_REGISTRATION_FAILED          -2
#define FD_UNREGISTERED_OK               0
#define FD_NO_SUCH_REGISTRATION         -1

/* Since the inception of netsnmp_external_event_info and 
 * netsnmp_dispatch_external_events, there is no longer a need for the data 
 * below to be globally visible.  We will leave it global for now for 
 * compatibility purposes. */
extern int      external_readfd[NUM_EXTERNAL_FDS],   external_readfdlen;
extern int      external_writefd[NUM_EXTERNAL_FDS],  external_writefdlen;
extern int      external_exceptfd[NUM_EXTERNAL_FDS], external_exceptfdlen;

extern void     (*external_readfdfunc[NUM_EXTERNAL_FDS])   (int, void *);
extern void     (*external_writefdfunc[NUM_EXTERNAL_FDS])  (int, void *);
extern void     (*external_exceptfdfunc[NUM_EXTERNAL_FDS]) (int, void *);

extern void    *external_readfd_data[NUM_EXTERNAL_FDS];
extern void    *external_writefd_data[NUM_EXTERNAL_FDS];
extern void    *external_exceptfd_data[NUM_EXTERNAL_FDS];

/* Here are the key functions of this unit.  Use register_xfd to register
 * a callback to be called when there is x activity on the register fd.  
 * x can be read, write, or except (for exception).  When registering,
 * you can pass in a pointer to some data that you have allocated that
 * you would like to have back when the callback is called. */
int             register_readfd(int, void (*func)(int, void *),   void *);
int             register_writefd(int, void (*func)(int, void *),  void *);
int             register_exceptfd(int, void (*func)(int, void *), void *);

/* Unregisters a given fd for events */
int             unregister_readfd(int);
int             unregister_writefd(int);
int             unregister_exceptfd(int);

/*
 * External Event Info
 *
 * Description:
 *   Call this function to add an external event fds to your read, write, 
 *   exception fds that your application already has.  When this function
 *   returns, your fd_sets will be ready for select().  It returns the
 *   biggest fd in the fd_sets so far.
 *
 * Input Parameters: None
 *
 * Output Parameters: None
 *
 * In/Out Parameters: 
 *   numfds - The biggest fd so far.  On exit to this function, numfds
 *            could of changed since we pass out the new biggest fd.
 *   readfds - Set of read FDs that we are monitoring.  This function
 *             can modify this set to have more FDs that we are monitoring.
 *   writefds - Set of write FDs that we are monitoring.  This function
 *             can modify this set to have more FDs that we are monitoring.
 *   exceptfds - Set of exception FDs that we are monitoring.  This function
 *             can modify this set to have more FDs that we are monitoring.
 *
 * Return Value: None
 *
 * Side Effects: None
 */
NETSNMP_IMPORT
void netsnmp_external_event_info(int *numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds);

NETSNMP_IMPORT
void netsnmp_external_event_info2(int *numfds,
                                  netsnmp_large_fd_set *readfds,
                                  netsnmp_large_fd_set *writefds,
                                  netsnmp_large_fd_set *exceptfds);

/*
 * Dispatch External Events
 *
 * Description:
 *   Call this function after select returns with pending events.  If any of
 *   them were NETSNMP external events, the registered callback will be called.
 *   The corresponding fd_set will have the FD cleared after the event is
 *   dispatched.
 *
 * Input Parameters: None
 *
 * Output Parameters: None
 *
 * In/Out Parameters: 
 *   count - Number of FDs that have activity.  In this function, we decrement
 *           count as we dispatch an event.
 *   readfds - Set of read FDs that have activity
 *   writefds - Set of write FDs that have activity
 *   exceptfds - Set of exception FDs that have activity 
 *
 * Return Value: None
 *
 * Side Effects: None
 */
NETSNMP_IMPORT
void netsnmp_dispatch_external_events(int *count, fd_set *readfds, fd_set *writefds, fd_set *exceptfds);
NETSNMP_IMPORT
void netsnmp_dispatch_external_events2(int *count,
                                       netsnmp_large_fd_set *readfds,
                                       netsnmp_large_fd_set *writefds,
                                       netsnmp_large_fd_set *exceptfds);
#ifdef __cplusplus
}
#endif
#endif

${this.title}

Code Editor : fd_event_manager.h