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 (c) 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 #include <arpa/inet.h> 27 #include <assert.h> 28 #include <fcntl.h> 29 #include <libdlpi.h> 30 #include <libnwam.h> 31 #include <net/if.h> 32 #include <pthread.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <sys/fcntl.h> 37 #include <unistd.h> 38 39 #include "events.h" 40 #include "ncp.h" 41 #include "ncu.h" 42 #include "objects.h" 43 #include "util.h" 44 45 /* 46 * dlpi_events.c - this file contains routines to retrieve 47 * DL_NOTE_LINK_[UP|DOWN] events from the system and packages them for high 48 * level processing. Holding a dlpi_handle to a link prevents the 49 * associated driver unloading that can happen when IP is not plumbed, 50 * so it is vital to ensure that the handle is open for the lifetime 51 * of the WiFi connection. 52 */ 53 54 /* 55 * This is a callback function executed when dlpi_recv() gets a DL_NOTE_LINK_UP. 56 * It packages up the event for consumption by the link state machine. 57 */ 58 /* ARGSUSED0 */ 59 static void 60 nwamd_dlpi_notify(dlpi_handle_t dhp, dlpi_notifyinfo_t *info, void *arg) 61 { 62 nwamd_event_t ev; 63 char *name = arg; 64 65 if (info->dni_note & DL_NOTE_LINK_UP) 66 ev = nwamd_event_init_link_state(name, B_TRUE); 67 else 68 ev = nwamd_event_init_link_state(name, B_FALSE); 69 if (ev != NULL) 70 nwamd_event_enqueue(ev); 71 } 72 73 /* 74 * We are only intested in DL_NOTE_LINK_UP events which we've registered for 75 * in nwamd_dlpi_add_link(). But we have to keep calling dlpi_recv() to 76 * force the notification callback to be executed. 77 */ 78 static void * 79 nwamd_dlpi_thread(void *arg) 80 { 81 int rc; 82 dlpi_handle_t *dh = arg; 83 84 do { 85 rc = dlpi_recv(*dh, NULL, NULL, NULL, NULL, -1, NULL); 86 } while (rc == DLPI_SUCCESS); 87 nlog(LOG_ERR, "dlpi_recv failed: %s", dlpi_strerror(rc)); 88 return (NULL); 89 } 90 91 /* 92 * This is called when we want to start receiving notifications from state 93 * changes on a link. 94 */ 95 void 96 nwamd_dlpi_add_link(nwamd_object_t obj) 97 { 98 nwamd_ncu_t *ncu = obj->nwamd_object_data; 99 nwamd_link_t *link; 100 dlpi_notifyid_t id; 101 int rc; 102 103 nlog(LOG_DEBUG, "nwamd_dlpi_add_link: ncu %p (%s) type %d", 104 ncu, obj->nwamd_object_name, ncu != NULL ? ncu->ncu_type : -1); 105 106 assert(ncu != NULL && ncu->ncu_type == NWAM_NCU_TYPE_LINK); 107 108 link = &ncu->ncu_link; 109 110 /* Already running? */ 111 if (link->nwamd_link_dlpi_thread != 0) { 112 nlog(LOG_DEBUG, "nwamd_dlpi_add_link(%s) already running", 113 obj->nwamd_object_name); 114 return; 115 } 116 117 rc = dlpi_open(ncu->ncu_name, &link->nwamd_link_dhp, 0); 118 if (rc != DLPI_SUCCESS) { 119 nlog(LOG_ERR, "nwamd_dlpi_add_link: dlpi_open(%s) = %s", 120 ncu->ncu_name, dlpi_strerror(rc)); 121 return; 122 } 123 124 nwamd_set_unset_link_properties(ncu, B_TRUE); 125 126 rc = dlpi_enabnotify(link->nwamd_link_dhp, 127 DL_NOTE_LINK_UP | DL_NOTE_LINK_DOWN, nwamd_dlpi_notify, 128 ncu->ncu_name, &id); 129 if (rc != DLPI_SUCCESS) { 130 nlog(LOG_ERR, 131 "nwamd_dlpi_add_link: dlpi_enabnotify(%s) = %s", 132 obj->nwamd_object_name, dlpi_strerror(rc)); 133 dlpi_close(link->nwamd_link_dhp); 134 return; 135 } 136 137 rc = pthread_create(&link->nwamd_link_dlpi_thread, NULL, 138 nwamd_dlpi_thread, &link->nwamd_link_dhp); 139 if (rc != 0) { 140 nlog(LOG_ERR, "nwamd_dlpi_add_link: couldn't create " 141 "dlpi thread for %s: %s", obj->nwamd_object_name, 142 strerror(rc)); 143 dlpi_close(link->nwamd_link_dhp); 144 } 145 } 146 147 /* 148 * This function is called when we are no longer interested in receiving 149 * notification from state changes on a link. 150 */ 151 void 152 nwamd_dlpi_delete_link(nwamd_object_t obj) 153 { 154 nwamd_ncu_t *ncu = obj->nwamd_object_data; 155 156 nlog(LOG_DEBUG, "nwamd_dlpi_delete_link: ncu %p (%s) type %d", 157 ncu, obj->nwamd_object_name, ncu != NULL ? ncu->ncu_type : -1); 158 159 if (ncu->ncu_link.nwamd_link_dlpi_thread != 0) { 160 (void) pthread_cancel( 161 ncu->ncu_link.nwamd_link_dlpi_thread); 162 (void) pthread_join(ncu->ncu_link.nwamd_link_dlpi_thread, NULL); 163 ncu->ncu_link.nwamd_link_dlpi_thread = 0; 164 /* Unset properties before closing */ 165 nwamd_set_unset_link_properties(ncu, B_FALSE); 166 } 167 168 dlpi_close(ncu->ncu_link.nwamd_link_dhp); 169 ncu->ncu_link.nwamd_link_dhp = NULL; 170 } 171