/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #ifndef _LIBINETUTIL_H #define _LIBINETUTIL_H #pragma ident "%Z%%M% %I% %E% SMI" /* * Contains SMI-private API for general internet functionality */ #ifdef __cplusplus extern "C" { #endif #include #include #include #include #include #if !defined(_KERNEL) && !defined(_BOOT) #define IFSP_MAXMODS 9 /* Max modules that can be pushed on if */ typedef struct { uint_t ifsp_ppa; /* Physical Point of Attachment */ uint_t ifsp_lun; /* Logical Unit number */ boolean_t ifsp_lunvalid; /* TRUE if lun is valid */ int ifsp_modcnt; /* Number of modules to be pushed */ char ifsp_devnm[LIFNAMSIZ]; /* only the device name */ char ifsp_mods[IFSP_MAXMODS][LIFNAMSIZ]; /* table of mods */ } ifspec_t; extern boolean_t ifparse_ifspec(const char *, ifspec_t *); extern void get_netmask4(const struct in_addr *, struct in_addr *); /* * Timer queues * * timer queues are a facility for managing timeouts in unix. in the * event driven model, unix provides us with poll(2)/select(3C), which * allow us to coordinate waiting on multiple descriptors with an * optional timeout. however, often (as is the case with the DHCP * agent), we want to manage multiple independent timeouts (say, one * for waiting for an OFFER to come back from a server in response to * a DISCOVER sent out on one interface, and another for waiting for * the T1 time on another interface). timer queues allow us to do * this in the event-driven model. * * note that timer queues do not in and of themselves provide the * event driven model (for instance, there is no handle_events() * routine). they merely provide the hooks to support multiple * independent timeouts. this is done for both simplicity and * applicability (for instance, while one approach would be to use * this timer queue with poll(2), another one would be to use SIGALRM * to wake up periodically, and then process all the expired timers.) */ typedef struct iu_timer_queue iu_tq_t; /* * a iu_timer_id_t refers to a given timer. its value should not be * interpreted by the interface consumer. it is a signed arithmetic * type, and no valid iu_timer_id_t has the value `-1'. */ typedef int iu_timer_id_t; #define IU_TIMER_ID_MAX 1024 /* max number of concurrent timers */ /* * a iu_tq_callback_t is a function that is called back in response to a * timer expiring. it may then carry out any necessary work, * including rescheduling itself for callback or scheduling / * cancelling other timers. the `void *' argument is the same value * that was passed into iu_schedule_timer(), and if it is dynamically * allocated, it is the callback's responsibility to know that, and to * free it. */ typedef void iu_tq_callback_t(iu_tq_t *, void *); iu_tq_t *iu_tq_create(void); void iu_tq_destroy(iu_tq_t *); iu_timer_id_t iu_schedule_timer(iu_tq_t *, uint32_t, iu_tq_callback_t *, void *); iu_timer_id_t iu_schedule_timer_ms(iu_tq_t *, uint64_t, iu_tq_callback_t *, void *); int iu_adjust_timer(iu_tq_t *, iu_timer_id_t, uint32_t); int iu_cancel_timer(iu_tq_t *, iu_timer_id_t, void **); int iu_expire_timers(iu_tq_t *); int iu_earliest_timer(iu_tq_t *); /* * Event Handler * * an event handler is an object-oriented "wrapper" for select(3C) / * poll(2), aimed to make the event demultiplexing system calls easier * to use and provide a generic reusable component. instead of * applications directly using select(3C) / poll(2), they register * events that should be received with the event handler, providing a * callback function to call when the event occurs. they then call * iu_handle_events() to wait and callback the registered functions * when events occur. also called a `reactor'. */ typedef struct iu_event_handler iu_eh_t; /* * an iu_event_id_t refers to a given event. its value should not be * interpreted by the interface consumer. it is a signed arithmetic * type, and no valid iu_event_id_t has the value `-1'. */ typedef int iu_event_id_t; /* * an iu_eh_callback_t is a function that is called back in response to * an event occurring. it may then carry out any work necessary in * response to the event. it receives the file descriptor upon which * the event occurred, a bit array of events that occurred (the same * array used as the revents by poll(2)), and its context through the * `void *' that was originally passed into iu_register_event(). * * NOTE: the same descriptor may not be registered multiple times for * different callbacks. if this behavior is desired, either use dup(2) * to get a unique descriptor, or demultiplex in the callback function * based on the events. */ typedef void iu_eh_callback_t(iu_eh_t *, int, short, iu_event_id_t, void *); typedef void iu_eh_sighandler_t(iu_eh_t *, int, void *); typedef boolean_t iu_eh_shutdown_t(iu_eh_t *, void *); iu_eh_t *iu_eh_create(void); void iu_eh_destroy(iu_eh_t *); iu_event_id_t iu_register_event(iu_eh_t *, int, short, iu_eh_callback_t *, void *); int iu_unregister_event(iu_eh_t *, iu_event_id_t, void **); int iu_handle_events(iu_eh_t *, iu_tq_t *); void iu_stop_handling_events(iu_eh_t *, unsigned int, iu_eh_shutdown_t *, void *); int iu_eh_register_signal(iu_eh_t *, int, iu_eh_sighandler_t *, void *); int iu_eh_unregister_signal(iu_eh_t *, int, void **); #endif /* !defined(_KERNEL) && !defined(_BOOT) */ #ifdef __cplusplus } #endif #endif /* !_LIBINETUTIL_H */