1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2019 Roy Marples <roy@marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef DHCP6_H 29 #define DHCP6_H 30 31 #include "dhcpcd.h" 32 33 #define IN6ADDR_LINKLOCAL_ALLDHCP_INIT \ 34 {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 35 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02 }}} 36 37 /* UDP port numbers for DHCP */ 38 #define DHCP6_CLIENT_PORT 546 39 #define DHCP6_SERVER_PORT 547 40 41 /* DHCP message type */ 42 #define DHCP6_SOLICIT 1 43 #define DHCP6_ADVERTISE 2 44 #define DHCP6_REQUEST 3 45 #define DHCP6_CONFIRM 4 46 #define DHCP6_RENEW 5 47 #define DHCP6_REBIND 6 48 #define DHCP6_REPLY 7 49 #define DHCP6_RELEASE 8 50 #define DHCP6_DECLINE 9 51 #define DHCP6_RECONFIGURE 10 52 #define DHCP6_INFORMATION_REQ 11 53 #define DHCP6_RELAY_FLOW 12 54 #define DHCP6_RELAY_REPL 13 55 #define DHCP6_RECONFIGURE_REQ 18 56 #define DHCP6_RECONFIGURE_REPLY 19 57 58 #ifdef DHCP6 59 60 #define D6_OPTION_CLIENTID 1 61 #define D6_OPTION_SERVERID 2 62 #define D6_OPTION_IA_NA 3 63 #define D6_OPTION_IA_TA 4 64 #define D6_OPTION_ORO 6 65 #define D6_OPTION_IA_ADDR 5 66 #define D6_OPTION_PREFERENCE 7 67 #define D6_OPTION_ELAPSED 8 68 #define D6_OPTION_AUTH 11 69 #define D6_OPTION_UNICAST 12 70 #define D6_OPTION_STATUS_CODE 13 71 #define D6_OPTION_RAPID_COMMIT 14 72 #define D6_OPTION_USER_CLASS 15 73 #define D6_OPTION_VENDOR_CLASS 16 74 #define D6_OPTION_VENDOR_OPTS 17 75 #define D6_OPTION_INTERFACE_ID 18 76 #define D6_OPTION_RECONF_MSG 19 77 #define D6_OPTION_RECONF_ACCEPT 20 78 #define D6_OPTION_SIP_SERVERS_NAME 21 79 #define D6_OPTION_SIP_SERVERS_ADDRESS 22 80 #define D6_OPTION_DNS_SERVERS 23 81 #define D6_OPTION_DOMAIN_LIST 24 82 #define D6_OPTION_IA_PD 25 83 #define D6_OPTION_IAPREFIX 26 84 #define D6_OPTION_NIS_SERVERS 27 85 #define D6_OPTION_NISP_SERVERS 28 86 #define D6_OPTION_NIS_DOMAIN_NAME 29 87 #define D6_OPTION_NISP_DOMAIN_NAME 30 88 #define D6_OPTION_SNTP_SERVERS 31 89 #define D6_OPTION_INFO_REFRESH_TIME 32 90 #define D6_OPTION_BCMS_SERVER_D 33 91 #define D6_OPTION_BCMS_SERVER_A 34 92 #define D6_OPTION_FQDN 39 93 #define D6_OPTION_POSIX_TIMEZONE 41 94 #define D6_OPTION_TZDB_TIMEZONE 42 95 #define D6_OPTION_PD_EXCLUDE 67 96 #define D6_OPTION_SOL_MAX_RT 82 97 #define D6_OPTION_INF_MAX_RT 83 98 #define D6_OPTION_MUDURL 112 99 100 #define D6_FQDN_PTR 0x00 101 #define D6_FQDN_BOTH 0x01 102 #define D6_FQDN_NONE 0x04 103 104 #include "dhcp.h" 105 #include "ipv6.h" 106 107 #define D6_STATUS_OK 0 108 #define D6_STATUS_FAIL 1 109 #define D6_STATUS_NOADDR 2 110 #define D6_STATUS_NOBINDING 3 111 #define D6_STATUS_NOTONLINK 4 112 #define D6_STATUS_USEMULTICAST 5 113 114 #define SOL_MAX_DELAY 1 115 #define SOL_TIMEOUT 1 116 #define SOL_MAX_RT 3600 /* RFC7083 */ 117 #define SOL_MAX_RC 0 118 #define REQ_MAX_DELAY 0 119 #define REQ_TIMEOUT 1 120 #define REQ_MAX_RT 30 121 #define REQ_MAX_RC 10 122 #define CNF_MAX_DELAY 1 123 #define CNF_TIMEOUT 1 124 #define CNF_MAX_RT 4 125 #define CNF_MAX_RC 0 126 #define CNF_MAX_RD 10 127 #define REN_MAX_DELAY 0 128 #define REN_TIMEOUT 10 129 #define REN_MAX_RT 600 130 #define REB_MAX_DELAY 0 131 #define REB_TIMEOUT 10 132 #define REB_MAX_RT 600 133 #define INF_MAX_DELAY 1 134 #define INF_TIMEOUT 1 135 #define INF_MAX_RD CNF_MAX_RD /* NOT RFC defined */ 136 #define INF_MAX_RT 3600 /* RFC7083 */ 137 #define REL_MAX_DELAY 0 138 #define REL_TIMEOUT 1 139 #define REL_MAX_RT 0 140 #define REL_MAX_RC 5 141 #define DEC_MAX_DELAY 0 142 #define DEC_TIMEOUT 1 143 #define DEC_MAX_RC 5 144 #define REC_MAX_DELAY 0 145 #define REC_TIMEOUT 2 146 #define REC_MAX_RC 8 147 #define HOP_COUNT_LIMIT 32 148 149 /* RFC4242 3.1 */ 150 #define IRT_DEFAULT 86400 151 #define IRT_MINIMUM 600 152 153 #define DHCP6_RAND_MIN -100 154 #define DHCP6_RAND_MAX 100 155 156 enum DH6S { 157 DH6S_INIT, 158 DH6S_DISCOVER, 159 DH6S_REQUEST, 160 DH6S_BOUND, 161 DH6S_RENEW, 162 DH6S_REBIND, 163 DH6S_CONFIRM, 164 DH6S_INFORM, 165 DH6S_INFORMED, 166 DH6S_RENEW_REQUESTED, 167 DH6S_PROBE, 168 DH6S_DELEGATED, 169 DH6S_TIMEDOUT, 170 DH6S_ITIMEDOUT, 171 DH6S_RELEASE, 172 DH6S_RELEASED 173 }; 174 175 struct dhcp6_state { 176 enum DH6S state; 177 struct timespec started; 178 179 /* Message retransmission timings */ 180 struct timespec RT; 181 unsigned int IMD; 182 unsigned int RTC; 183 time_t IRT; 184 unsigned int MRC; 185 time_t MRT; 186 void (*MRCcallback)(void *); 187 time_t sol_max_rt; 188 time_t inf_max_rt; 189 190 struct dhcp6_message *send; 191 size_t send_len; 192 struct dhcp6_message *recv; 193 size_t recv_len; 194 struct dhcp6_message *new; 195 size_t new_len; 196 struct dhcp6_message *old; 197 size_t old_len; 198 199 struct timespec acquired; 200 uint32_t renew; 201 uint32_t rebind; 202 uint32_t expire; 203 struct in6_addr unicast; 204 struct ipv6_addrhead addrs; 205 uint32_t lowpl; 206 /* The +3 is for the possible .pd extension for prefix delegation */ 207 char leasefile[sizeof(LEASEFILE6) + IF_NAMESIZE + (IF_SSIDLEN * 4) +3]; 208 const char *reason; 209 uint16_t lerror; /* Last error received from DHCPv6 reply. */ 210 struct authstate auth; 211 }; 212 213 #define D6_STATE(ifp) \ 214 ((struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6]) 215 #define D6_CSTATE(ifp) \ 216 ((const struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6]) 217 #define D6_STATE_RUNNING(ifp) \ 218 (D6_CSTATE((ifp)) && \ 219 D6_CSTATE((ifp))->reason && dhcp6_dadcompleted((ifp))) 220 221 void dhcp6_printoptions(const struct dhcpcd_ctx *, 222 const struct dhcp_opt *, size_t); 223 const struct ipv6_addr *dhcp6_iffindaddr(const struct interface *ifp, 224 const struct in6_addr *addr, unsigned int flags); 225 struct ipv6_addr *dhcp6_findaddr(struct dhcpcd_ctx *, const struct in6_addr *, 226 unsigned int); 227 size_t dhcp6_find_delegates(struct interface *); 228 int dhcp6_start(struct interface *, enum DH6S); 229 void dhcp6_reboot(struct interface *); 230 void dhcp6_renew(struct interface *); 231 ssize_t dhcp6_env(char **, const char *, const struct interface *, 232 const struct dhcp6_message *, size_t); 233 void dhcp6_free(struct interface *); 234 void dhcp6_handleifa(int, struct ipv6_addr *, pid_t); 235 int dhcp6_dadcompleted(const struct interface *); 236 void dhcp6_abort(struct interface *); 237 void dhcp6_drop(struct interface *, const char *); 238 void dhcp6_dropnondelegates(struct interface *ifp); 239 int dhcp6_dump(struct interface *); 240 #endif /* DHCP6 */ 241 242 #endif /* DHCP6_H */ 243