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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1995-2001 by Sun Microsystems, Inc. 24 * All rights reserved. 25 * 26 * INFORM_SENT state of the client state machine. 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/types.h> 32 #include <string.h> 33 #include <time.h> 34 #include <unistd.h> 35 #include <sys/sockio.h> 36 #include <sys/socket.h> 37 #include <netinet/in.h> 38 #include <netinet/udp.h> 39 #include <netinet/ip_var.h> 40 #include <netinet/udp_var.h> 41 #include <dhcpmsg.h> 42 43 #include "util.h" 44 #include "packet.h" 45 #include "interface.h" 46 47 /* 48 * dhcp_inform(): sends an INFORM packet and sets up reception for an ACK 49 * 50 * input: struct ifslist *: the interface to send the inform on, ... 51 * output: void 52 * note: the INFORM cannot be sent successfully if the interface 53 * does not have an IP address 54 */ 55 56 void 57 dhcp_inform(struct ifslist *ifsp) 58 { 59 dhcp_pkt_t *dpkt; 60 struct in_addr *our_addr; 61 struct ifreq ifr; 62 63 ifsp->if_state = INIT; 64 65 /* 66 * fetch our IP address -- since we may not manage the 67 * interface, go fetch it with ioctl() 68 */ 69 70 (void) memset(&ifr, 0, sizeof (struct ifreq)); 71 (void) strlcpy(ifr.ifr_name, ifsp->if_name, IFNAMSIZ); 72 ifr.ifr_addr.sa_family = AF_INET; 73 74 if (ioctl(ifsp->if_sock_fd, SIOCGIFADDR, &ifr) == -1) { 75 ifsp->if_dflags |= DHCP_IF_FAILED; 76 ipc_action_finish(ifsp, DHCP_IPC_E_INT); 77 async_finish(ifsp); 78 return; 79 } 80 81 /* 82 * the error handling here and in the check for IFF_UP below 83 * are handled different from most since it is the user who is 84 * at fault for the problem, not the machine. 85 */ 86 87 /* LINTED [ifr_addr is a sockaddr which will be aligned] */ 88 our_addr = &((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr; 89 if (our_addr->s_addr == htonl(INADDR_ANY)) { 90 dhcpmsg(MSG_WARNING, "dhcp_inform: INFORM attempted on " 91 "interface with no IP address"); 92 ipc_action_finish(ifsp, DHCP_IPC_E_NOIPIF); 93 async_finish(ifsp); 94 remove_ifs(ifsp); 95 return; 96 } 97 98 if (ioctl(ifsp->if_sock_fd, SIOCGIFFLAGS, &ifr) == -1) { 99 ifsp->if_dflags |= DHCP_IF_FAILED; 100 ipc_action_finish(ifsp, DHCP_IPC_E_INT); 101 async_finish(ifsp); 102 return; 103 } 104 105 if ((ifr.ifr_flags & IFF_UP) == 0) { 106 dhcpmsg(MSG_WARNING, "dhcp_inform: INFORM attempted on downed " 107 "interface"); 108 ipc_action_finish(ifsp, DHCP_IPC_E_DOWNIF); 109 async_finish(ifsp); 110 remove_ifs(ifsp); 111 return; 112 } 113 114 /* 115 * assemble a DHCPREQUEST packet, without the server id 116 * option. fill in ciaddr, since we know this. if_server 117 * will be set to the server's IP address, which will be the 118 * broadcast address if we don't know it. The max dhcp message size 119 * option is set to the interface max, minus the size of the udp and 120 * ip headers. 121 */ 122 123 dpkt = init_pkt(ifsp, INFORM); 124 dpkt->pkt->ciaddr = *our_addr; 125 126 add_pkt_opt16(dpkt, CD_MAX_DHCP_SIZE, htons(ifsp->if_max - 127 sizeof (struct udpiphdr))); 128 add_pkt_opt(dpkt, CD_CLASS_ID, class_id, class_id_len); 129 add_pkt_opt(dpkt, CD_REQUEST_LIST, ifsp->if_prl, ifsp->if_prllen); 130 add_pkt_opt(dpkt, CD_END, NULL, 0); 131 132 if (send_pkt(ifsp, dpkt, ifsp->if_server.s_addr, NULL) == 0) { 133 ifsp->if_dflags |= DHCP_IF_FAILED; 134 dhcpmsg(MSG_ERROR, "dhcp_inform: send_pkt failed"); 135 ipc_action_finish(ifsp, DHCP_IPC_E_INT); 136 async_finish(ifsp); 137 return; 138 } 139 140 if (register_acknak(ifsp) == 0) { 141 ifsp->if_dflags |= DHCP_IF_FAILED; 142 ipc_action_finish(ifsp, DHCP_IPC_E_MEMORY); 143 async_finish(ifsp); 144 return; 145 } 146 147 ifsp->if_state = INFORM_SENT; 148 } 149