1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <sys/types.h> 30*0Sstevel@tonic-gate #include <sys/poll.h> 31*0Sstevel@tonic-gate #include <dhcpmsg.h> 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #include "interface.h" 34*0Sstevel@tonic-gate #include "ipc_action.h" 35*0Sstevel@tonic-gate #include "util.h" 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate static iu_tq_callback_t ipc_action_timeout; 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate /* 40*0Sstevel@tonic-gate * ipc_action_init(): initializes the ipc_action structure 41*0Sstevel@tonic-gate * 42*0Sstevel@tonic-gate * input: struct ifslist *: the interface to initialize it for 43*0Sstevel@tonic-gate * output: void 44*0Sstevel@tonic-gate */ 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate void 47*0Sstevel@tonic-gate ipc_action_init(struct ifslist *ifsp) 48*0Sstevel@tonic-gate { 49*0Sstevel@tonic-gate ifsp->if_ia.ia_tid = -1; 50*0Sstevel@tonic-gate } 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate /* 53*0Sstevel@tonic-gate * ipc_action_start(): starts an ipc_action request on an interface 54*0Sstevel@tonic-gate * 55*0Sstevel@tonic-gate * input: struct ifslist *: the interface to start the action on 56*0Sstevel@tonic-gate * dhcp_ipc_request_t *: the type of request 57*0Sstevel@tonic-gate * int: the descriptor to contact the action requestor 58*0Sstevel@tonic-gate * output: int: 1 if the request is started successfully, 0 otherwise 59*0Sstevel@tonic-gate */ 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate int 62*0Sstevel@tonic-gate ipc_action_start(struct ifslist *ifsp, dhcp_ipc_request_t *request, int fd) 63*0Sstevel@tonic-gate { 64*0Sstevel@tonic-gate if (request->timeout == DHCP_IPC_WAIT_DEFAULT) 65*0Sstevel@tonic-gate request->timeout = DHCP_IPC_DEFAULT_WAIT; 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate ifsp->if_ia.ia_request = request; 68*0Sstevel@tonic-gate ifsp->if_ia.ia_fd = fd; 69*0Sstevel@tonic-gate ifsp->if_ia.ia_cmd = DHCP_IPC_CMD(request->message_type); 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate if (request->timeout == DHCP_IPC_WAIT_FOREVER) 72*0Sstevel@tonic-gate ifsp->if_ia.ia_tid = -1; 73*0Sstevel@tonic-gate else { 74*0Sstevel@tonic-gate ifsp->if_ia.ia_tid = iu_schedule_timer(tq, request->timeout, 75*0Sstevel@tonic-gate ipc_action_timeout, ifsp); 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate if (ifsp->if_ia.ia_tid == -1) 78*0Sstevel@tonic-gate return (0); 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate hold_ifs(ifsp); 81*0Sstevel@tonic-gate } 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate return (1); 84*0Sstevel@tonic-gate } 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate /* 87*0Sstevel@tonic-gate * ipc_action_pending(): checks if there is a pending ipc_action request on 88*0Sstevel@tonic-gate * an interface 89*0Sstevel@tonic-gate * 90*0Sstevel@tonic-gate * input: struct ifslist *: the interface to check for a pending ipc_action on 91*0Sstevel@tonic-gate * output: boolean_t: B_TRUE if there is a pending ipc_action request 92*0Sstevel@tonic-gate */ 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate boolean_t 95*0Sstevel@tonic-gate ipc_action_pending(struct ifslist *ifsp) 96*0Sstevel@tonic-gate { 97*0Sstevel@tonic-gate struct pollfd pollfd; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate if (ifsp->if_ia.ia_fd > 0) { 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate pollfd.events = POLLIN; 102*0Sstevel@tonic-gate pollfd.fd = ifsp->if_ia.ia_fd; 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate if (poll(&pollfd, 1, 0) == 0) 105*0Sstevel@tonic-gate return (B_TRUE); 106*0Sstevel@tonic-gate } 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate return (B_FALSE); 109*0Sstevel@tonic-gate } 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate /* 112*0Sstevel@tonic-gate * ipc_action_finish(): completes an ipc_action request on an interface 113*0Sstevel@tonic-gate * 114*0Sstevel@tonic-gate * input: struct ifslist *: the interface to complete the action on 115*0Sstevel@tonic-gate * int: the reason why the action finished (nonzero on error) 116*0Sstevel@tonic-gate * output: void 117*0Sstevel@tonic-gate */ 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate void 120*0Sstevel@tonic-gate ipc_action_finish(struct ifslist *ifsp, int reason) 121*0Sstevel@tonic-gate { 122*0Sstevel@tonic-gate struct ipc_action *ia = &ifsp->if_ia; 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate if (ipc_action_pending(ifsp) == B_FALSE) 125*0Sstevel@tonic-gate return; 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate if (reason == 0) 128*0Sstevel@tonic-gate send_ok_reply(ia->ia_request, &ia->ia_fd); 129*0Sstevel@tonic-gate else 130*0Sstevel@tonic-gate send_error_reply(ia->ia_request, reason, &ia->ia_fd); 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate ipc_action_cancel_timer(ifsp); 133*0Sstevel@tonic-gate } 134*0Sstevel@tonic-gate 135*0Sstevel@tonic-gate /* 136*0Sstevel@tonic-gate * ipc_action_timeout(): times out an ipc_action on an interface (the request 137*0Sstevel@tonic-gate * continues asynchronously, however) 138*0Sstevel@tonic-gate * 139*0Sstevel@tonic-gate * input: iu_tq_t *: unused 140*0Sstevel@tonic-gate * void *: the struct ifslist * the ipc_action was pending on 141*0Sstevel@tonic-gate * output: void 142*0Sstevel@tonic-gate */ 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate /* ARGSUSED */ 145*0Sstevel@tonic-gate static void 146*0Sstevel@tonic-gate ipc_action_timeout(iu_tq_t *tq, void *arg) 147*0Sstevel@tonic-gate { 148*0Sstevel@tonic-gate struct ifslist *ifsp = (struct ifslist *)arg; 149*0Sstevel@tonic-gate struct ipc_action *ia = &ifsp->if_ia; 150*0Sstevel@tonic-gate 151*0Sstevel@tonic-gate if (check_ifs(ifsp) == 0) { 152*0Sstevel@tonic-gate (void) release_ifs(ifsp); 153*0Sstevel@tonic-gate return; 154*0Sstevel@tonic-gate } 155*0Sstevel@tonic-gate 156*0Sstevel@tonic-gate dhcpmsg(MSG_VERBOSE, "ipc timeout waiting for agent to complete " 157*0Sstevel@tonic-gate "command %d for %s", ia->ia_cmd, ifsp->if_name); 158*0Sstevel@tonic-gate 159*0Sstevel@tonic-gate send_error_reply(ia->ia_request, DHCP_IPC_E_TIMEOUT, &ia->ia_fd); 160*0Sstevel@tonic-gate ia->ia_tid = -1; 161*0Sstevel@tonic-gate } 162*0Sstevel@tonic-gate 163*0Sstevel@tonic-gate /* 164*0Sstevel@tonic-gate * ipc_action_cancel_timer(): cancels the pending ipc_action timer for this 165*0Sstevel@tonic-gate * request 166*0Sstevel@tonic-gate * 167*0Sstevel@tonic-gate * input: struct ifslist *: the interface with a pending request to cancel 168*0Sstevel@tonic-gate * output: void 169*0Sstevel@tonic-gate */ 170*0Sstevel@tonic-gate 171*0Sstevel@tonic-gate void 172*0Sstevel@tonic-gate ipc_action_cancel_timer(struct ifslist *ifsp) 173*0Sstevel@tonic-gate { 174*0Sstevel@tonic-gate if (ifsp->if_ia.ia_tid == -1) 175*0Sstevel@tonic-gate return; 176*0Sstevel@tonic-gate 177*0Sstevel@tonic-gate /* 178*0Sstevel@tonic-gate * if we can't cancel this timer, we're really in the 179*0Sstevel@tonic-gate * twilight zone. however, as long as we don't drop the 180*0Sstevel@tonic-gate * reference to the ifsp, it shouldn't hurt us 181*0Sstevel@tonic-gate */ 182*0Sstevel@tonic-gate 183*0Sstevel@tonic-gate if (iu_cancel_timer(tq, ifsp->if_ia.ia_tid, NULL) == 1) { 184*0Sstevel@tonic-gate ifsp->if_ia.ia_tid = -1; 185*0Sstevel@tonic-gate (void) release_ifs(ifsp); 186*0Sstevel@tonic-gate } 187*0Sstevel@tonic-gate } 188