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 * INIT_REBOOT state of the DHCP client state machine. 27*0Sstevel@tonic-gate */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #include <sys/types.h> 32*0Sstevel@tonic-gate #include <stdio.h> 33*0Sstevel@tonic-gate #include <limits.h> 34*0Sstevel@tonic-gate #include <sys/socket.h> 35*0Sstevel@tonic-gate #include <netinet/in.h> 36*0Sstevel@tonic-gate #include <netinet/dhcp.h> 37*0Sstevel@tonic-gate #include <netinet/udp.h> 38*0Sstevel@tonic-gate #include <netinet/ip_var.h> 39*0Sstevel@tonic-gate #include <netinet/udp_var.h> 40*0Sstevel@tonic-gate #include <dhcpmsg.h> 41*0Sstevel@tonic-gate #include <string.h> 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate #include "agent.h" 44*0Sstevel@tonic-gate #include "packet.h" 45*0Sstevel@tonic-gate #include "states.h" 46*0Sstevel@tonic-gate #include "util.h" 47*0Sstevel@tonic-gate #include "interface.h" 48*0Sstevel@tonic-gate #include "defaults.h" 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate static stop_func_t stop_init_reboot; 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate /* 53*0Sstevel@tonic-gate * dhcp_init_reboot(): attempts to reuse a cached configuration on an interface 54*0Sstevel@tonic-gate * 55*0Sstevel@tonic-gate * input: struct ifslist *: the interface to reuse the configuration on 56*0Sstevel@tonic-gate * output: void 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate void 60*0Sstevel@tonic-gate dhcp_init_reboot(struct ifslist *ifsp) 61*0Sstevel@tonic-gate { 62*0Sstevel@tonic-gate dhcp_pkt_t *dpkt; 63*0Sstevel@tonic-gate const char *reqhost; 64*0Sstevel@tonic-gate char hostfile[PATH_MAX + 1]; 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate dhcpmsg(MSG_VERBOSE, "%s has cached configuration - entering " 67*0Sstevel@tonic-gate "INIT_REBOOT", ifsp->if_name); 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate ifsp->if_state = INIT_REBOOT; 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate if (register_acknak(ifsp) == 0) { 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate ifsp->if_state = INIT; 74*0Sstevel@tonic-gate ifsp->if_dflags |= DHCP_IF_FAILED; 75*0Sstevel@tonic-gate ipc_action_finish(ifsp, DHCP_IPC_E_MEMORY); 76*0Sstevel@tonic-gate async_finish(ifsp); 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate dhcpmsg(MSG_ERROR, "dhcp_init_reboot: cannot register to " 79*0Sstevel@tonic-gate "collect ACK/NAK packets, reverting to INIT on %s", 80*0Sstevel@tonic-gate ifsp->if_name); 81*0Sstevel@tonic-gate return; 82*0Sstevel@tonic-gate } 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate /* 85*0Sstevel@tonic-gate * assemble DHCPREQUEST message. The max dhcp message size 86*0Sstevel@tonic-gate * option is set to the interface max, minus the size of the udp and 87*0Sstevel@tonic-gate * ip headers. 88*0Sstevel@tonic-gate */ 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate dpkt = init_pkt(ifsp, REQUEST); 91*0Sstevel@tonic-gate add_pkt_opt32(dpkt, CD_REQUESTED_IP_ADDR, 92*0Sstevel@tonic-gate ifsp->if_ack->pkt->yiaddr.s_addr); 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate add_pkt_opt32(dpkt, CD_LEASE_TIME, htonl(DHCP_PERM)); 95*0Sstevel@tonic-gate add_pkt_opt16(dpkt, CD_MAX_DHCP_SIZE, htons(ifsp->if_max - 96*0Sstevel@tonic-gate sizeof (struct udpiphdr))); 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate add_pkt_opt(dpkt, CD_CLASS_ID, class_id, class_id_len); 99*0Sstevel@tonic-gate add_pkt_opt(dpkt, CD_REQUEST_LIST, ifsp->if_prl, ifsp->if_prllen); 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate /* 102*0Sstevel@tonic-gate * Set CD_HOSTNAME option if REQUEST_HOSTNAME is set and a hostname 103*0Sstevel@tonic-gate * is found in /etc/hostname.<ifname> 104*0Sstevel@tonic-gate */ 105*0Sstevel@tonic-gate if (df_get_bool(ifsp->if_name, DF_REQUEST_HOSTNAME)) { 106*0Sstevel@tonic-gate dhcpmsg(MSG_DEBUG, "dhcp_selecting: DF_REQUEST_HOSTNAME"); 107*0Sstevel@tonic-gate (void) snprintf(hostfile, sizeof (hostfile), "/etc/hostname.%s", 108*0Sstevel@tonic-gate ifsp->if_name); 109*0Sstevel@tonic-gate 110*0Sstevel@tonic-gate if ((reqhost = iffile_to_hostname(hostfile)) != NULL) { 111*0Sstevel@tonic-gate dhcpmsg(MSG_DEBUG, "dhcp_selecting: host %s", reqhost); 112*0Sstevel@tonic-gate if ((ifsp->if_reqhost = strdup(reqhost)) != NULL) 113*0Sstevel@tonic-gate add_pkt_opt(dpkt, CD_HOSTNAME, ifsp->if_reqhost, 114*0Sstevel@tonic-gate strlen(ifsp->if_reqhost)); 115*0Sstevel@tonic-gate else 116*0Sstevel@tonic-gate dhcpmsg(MSG_WARNING, "dhcp_selecting: cannot" 117*0Sstevel@tonic-gate " allocate memory for host name option"); 118*0Sstevel@tonic-gate } 119*0Sstevel@tonic-gate } 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate add_pkt_opt(dpkt, CD_END, NULL, 0); 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate (void) send_pkt(ifsp, dpkt, htonl(INADDR_BROADCAST), stop_init_reboot); 124*0Sstevel@tonic-gate } 125*0Sstevel@tonic-gate 126*0Sstevel@tonic-gate /* 127*0Sstevel@tonic-gate * stop_init_reboot(): decides when to stop retransmitting REQUESTs 128*0Sstevel@tonic-gate * 129*0Sstevel@tonic-gate * input: struct ifslist *: the interface REQUESTs are being sent on 130*0Sstevel@tonic-gate * unsigned int: the number of REQUESTs sent so far 131*0Sstevel@tonic-gate * output: boolean_t: B_TRUE if retransmissions should stop 132*0Sstevel@tonic-gate */ 133*0Sstevel@tonic-gate 134*0Sstevel@tonic-gate static boolean_t 135*0Sstevel@tonic-gate stop_init_reboot(struct ifslist *ifsp, unsigned int n_requests) 136*0Sstevel@tonic-gate { 137*0Sstevel@tonic-gate if (n_requests >= DHCP_MAX_REQUESTS) { 138*0Sstevel@tonic-gate 139*0Sstevel@tonic-gate (void) unregister_acknak(ifsp); 140*0Sstevel@tonic-gate 141*0Sstevel@tonic-gate dhcpmsg(MSG_INFO, "no ACK/NAK to INIT_REBOOT REQUEST, " 142*0Sstevel@tonic-gate "using remainder of existing lease on %s", ifsp->if_name); 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate /* 145*0Sstevel@tonic-gate * we already stuck our old ack in ifsp->if_ack and 146*0Sstevel@tonic-gate * relativized the packet times, so we can just 147*0Sstevel@tonic-gate * pretend that the server sent it to us and move to 148*0Sstevel@tonic-gate * bound. if that fails, fall back to selecting. 149*0Sstevel@tonic-gate */ 150*0Sstevel@tonic-gate 151*0Sstevel@tonic-gate if (dhcp_bound(ifsp, NULL) == 0) 152*0Sstevel@tonic-gate dhcp_selecting(ifsp); 153*0Sstevel@tonic-gate 154*0Sstevel@tonic-gate return (B_TRUE); 155*0Sstevel@tonic-gate } 156*0Sstevel@tonic-gate 157*0Sstevel@tonic-gate return (B_FALSE); 158*0Sstevel@tonic-gate } 159