1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _LIBINETUTIL_H 28 #define _LIBINETUTIL_H 29 30 /* 31 * Contains SMI-private API for general Internet functionality 32 */ 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 #include <netinet/inetutil.h> 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netinet/in.h> 42 #include <net/if.h> 43 44 #if !defined(_KERNEL) && !defined(_BOOT) 45 46 typedef struct { 47 uint_t ifsp_ppa; /* Physical Point of Attachment */ 48 uint_t ifsp_lun; /* Logical Unit number */ 49 boolean_t ifsp_lunvalid; /* TRUE if lun is valid */ 50 char ifsp_devnm[LIFNAMSIZ]; /* only the device name */ 51 } ifspec_t; 52 53 extern boolean_t ifparse_ifspec(const char *, ifspec_t *); 54 extern void get_netmask4(const struct in_addr *, struct in_addr *); 55 extern boolean_t sockaddrcmp(const struct sockaddr_storage *, 56 const struct sockaddr_storage *); 57 58 /* 59 * Extended version of the classic BSD ifaddrlist() interface: 60 * 61 * int ifaddrlist(struct ifaddrlist **addrlistp, int af, uint_t flags, 62 * char *errbuf); 63 * 64 * * addrlistp: Upon success, ifaddrlist() sets *addrlistp to a 65 * dynamically-allocated array of addresses. 66 * 67 * * af: Either AF_INET to obtain IPv4 addresses, or AF_INET6 to 68 * obtain IPv6 addresses. 69 * 70 * * flags: LIFC_* flags that control the classes of interfaces that 71 * will be visible. 72 * 73 * * errbuf: A caller-supplied buffer of ERRBUFSIZE. Upon failure, 74 * provides the reason for the failure. 75 * 76 * Upon success, ifaddrlist() returns the number of addresses in the array 77 * pointed to by `addrlistp'. If the count is 0, then `addrlistp' is NULL. 78 */ 79 union any_in_addr { 80 struct in6_addr addr6; 81 struct in_addr addr; 82 }; 83 84 struct ifaddrlist { 85 int index; /* interface index */ 86 union any_in_addr addr; /* interface address */ 87 char device[LIFNAMSIZ + 1]; /* interface name */ 88 uint64_t flags; /* interface flags */ 89 }; 90 91 #define ERRBUFSIZE 128 /* expected size of fourth argument */ 92 93 extern int ifaddrlist(struct ifaddrlist **, int, uint_t, char *); 94 95 /* 96 * Similar to ifaddrlist(), but returns a linked-list of addresses for a 97 * *specific* interface name, and allows specific address flags to be matched 98 * against. A linked list is used rather than an array so that information 99 * can grow over time without affecting binary compatibility. Also, leaves 100 * error-handling up to the caller. Returns the number of ifaddrlistx's 101 * chained through ifaddrp. 102 * 103 * int ifaddrlistx(const char *ifname, uint64_t set, uint64_t clear, 104 * ifaddrlistx_t **ifaddrp); 105 * 106 * * ifname: Interface name to match against. 107 * 108 * * set: One or more flags that must be set on the address for 109 * it to be returned. 110 * 111 * * clear: Flags that must be clear on the address for it to be 112 * returned. 113 * 114 * * ifaddrp: Upon success, ifaddrlistx() sets *ifaddrp to the head 115 * of a dynamically-allocated array of ifaddrlistx structures. 116 * 117 * Once done, the caller must free `ifaddrp' by calling ifaddrlistx_free(). 118 */ 119 typedef struct ifaddrlistx { 120 struct ifaddrlistx *ia_next; 121 char ia_name[LIFNAMSIZ]; 122 uint64_t ia_flags; 123 struct sockaddr_storage ia_addr; 124 } ifaddrlistx_t; 125 126 extern int ifaddrlistx(const char *, uint64_t, uint64_t, ifaddrlistx_t **); 127 extern void ifaddrlistx_free(ifaddrlistx_t *); 128 129 /* 130 * Timer queues 131 * 132 * timer queues are a facility for managing timeouts in unix. in the 133 * event driven model, unix provides us with poll(2)/select(3C), which 134 * allow us to coordinate waiting on multiple descriptors with an 135 * optional timeout. however, often (as is the case with the DHCP 136 * agent), we want to manage multiple independent timeouts (say, one 137 * for waiting for an OFFER to come back from a server in response to 138 * a DISCOVER sent out on one interface, and another for waiting for 139 * the T1 time on another interface). timer queues allow us to do 140 * this in the event-driven model. 141 * 142 * note that timer queues do not in and of themselves provide the 143 * event driven model (for instance, there is no handle_events() 144 * routine). they merely provide the hooks to support multiple 145 * independent timeouts. this is done for both simplicity and 146 * applicability (for instance, while one approach would be to use 147 * this timer queue with poll(2), another one would be to use SIGALRM 148 * to wake up periodically, and then process all the expired timers.) 149 */ 150 151 typedef struct iu_timer_queue iu_tq_t; 152 153 /* 154 * a iu_timer_id_t refers to a given timer. its value should not be 155 * interpreted by the interface consumer. it is a signed arithmetic 156 * type, and no valid iu_timer_id_t has the value `-1'. 157 */ 158 159 typedef int iu_timer_id_t; 160 161 #define IU_TIMER_ID_MAX 4096 /* max number of concurrent timers */ 162 163 /* 164 * a iu_tq_callback_t is a function that is called back in response to a 165 * timer expiring. it may then carry out any necessary work, 166 * including rescheduling itself for callback or scheduling / 167 * cancelling other timers. the `void *' argument is the same value 168 * that was passed into iu_schedule_timer(), and if it is dynamically 169 * allocated, it is the callback's responsibility to know that, and to 170 * free it. 171 */ 172 173 typedef void iu_tq_callback_t(iu_tq_t *, void *); 174 175 iu_tq_t *iu_tq_create(void); 176 void iu_tq_destroy(iu_tq_t *); 177 iu_timer_id_t iu_schedule_timer(iu_tq_t *, uint32_t, iu_tq_callback_t *, 178 void *); 179 iu_timer_id_t iu_schedule_timer_ms(iu_tq_t *, uint64_t, iu_tq_callback_t *, 180 void *); 181 int iu_adjust_timer(iu_tq_t *, iu_timer_id_t, uint32_t); 182 int iu_cancel_timer(iu_tq_t *, iu_timer_id_t, void **); 183 int iu_expire_timers(iu_tq_t *); 184 int iu_earliest_timer(iu_tq_t *); 185 186 /* 187 * Event Handler 188 * 189 * an event handler is an object-oriented "wrapper" for select(3C) / 190 * poll(2), aimed to make the event demultiplexing system calls easier 191 * to use and provide a generic reusable component. instead of 192 * applications directly using select(3C) / poll(2), they register 193 * events that should be received with the event handler, providing a 194 * callback function to call when the event occurs. they then call 195 * iu_handle_events() to wait and callback the registered functions 196 * when events occur. also called a `reactor'. 197 */ 198 199 typedef struct iu_event_handler iu_eh_t; 200 201 /* 202 * an iu_event_id_t refers to a given event. its value should not be 203 * interpreted by the interface consumer. it is a signed arithmetic 204 * type, and no valid iu_event_id_t has the value `-1'. 205 */ 206 207 typedef int iu_event_id_t; 208 209 /* 210 * an iu_eh_callback_t is a function that is called back in response to 211 * an event occurring. it may then carry out any work necessary in 212 * response to the event. it receives the file descriptor upon which 213 * the event occurred, a bit array of events that occurred (the same 214 * array used as the revents by poll(2)), and its context through the 215 * `void *' that was originally passed into iu_register_event(). 216 * 217 * NOTE: the same descriptor may not be registered multiple times for 218 * different callbacks. if this behavior is desired, either use dup(2) 219 * to get a unique descriptor, or demultiplex in the callback function 220 * based on the events. 221 */ 222 223 typedef void iu_eh_callback_t(iu_eh_t *, int, short, iu_event_id_t, void *); 224 typedef void iu_eh_sighandler_t(iu_eh_t *, int, void *); 225 typedef boolean_t iu_eh_shutdown_t(iu_eh_t *, void *); 226 227 iu_eh_t *iu_eh_create(void); 228 void iu_eh_destroy(iu_eh_t *); 229 iu_event_id_t iu_register_event(iu_eh_t *, int, short, iu_eh_callback_t *, 230 void *); 231 int iu_unregister_event(iu_eh_t *, iu_event_id_t, void **); 232 int iu_handle_events(iu_eh_t *, iu_tq_t *); 233 void iu_stop_handling_events(iu_eh_t *, unsigned int, 234 iu_eh_shutdown_t *, void *); 235 int iu_eh_register_signal(iu_eh_t *, int, iu_eh_sighandler_t *, 236 void *); 237 int iu_eh_unregister_signal(iu_eh_t *, int, void **); 238 239 #endif /* !defined(_KERNEL) && !defined(_BOOT) */ 240 241 #ifdef __cplusplus 242 } 243 #endif 244 245 #endif /* !_LIBINETUTIL_H */ 246