1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2018 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 #define D6_OPTION_CLIENTID 1 59 #define D6_OPTION_SERVERID 2 60 #define D6_OPTION_IA_NA 3 61 #define D6_OPTION_IA_TA 4 62 #define D6_OPTION_ORO 6 63 #define D6_OPTION_IA_ADDR 5 64 #define D6_OPTION_PREFERENCE 7 65 #define D6_OPTION_ELAPSED 8 66 #define D6_OPTION_AUTH 11 67 #define D6_OPTION_UNICAST 12 68 #define D6_OPTION_STATUS_CODE 13 69 #define D6_OPTION_RAPID_COMMIT 14 70 #define D6_OPTION_USER_CLASS 15 71 #define D6_OPTION_VENDOR_CLASS 16 72 #define D6_OPTION_VENDOR_OPTS 17 73 #define D6_OPTION_INTERFACE_ID 18 74 #define D6_OPTION_RECONF_MSG 19 75 #define D6_OPTION_RECONF_ACCEPT 20 76 #define D6_OPTION_SIP_SERVERS_NAME 21 77 #define D6_OPTION_SIP_SERVERS_ADDRESS 22 78 #define D6_OPTION_DNS_SERVERS 23 79 #define D6_OPTION_DOMAIN_LIST 24 80 #define D6_OPTION_IA_PD 25 81 #define D6_OPTION_IAPREFIX 26 82 #define D6_OPTION_NIS_SERVERS 27 83 #define D6_OPTION_NISP_SERVERS 28 84 #define D6_OPTION_NIS_DOMAIN_NAME 29 85 #define D6_OPTION_NISP_DOMAIN_NAME 30 86 #define D6_OPTION_SNTP_SERVERS 31 87 #define D6_OPTION_INFO_REFRESH_TIME 32 88 #define D6_OPTION_BCMS_SERVER_D 33 89 #define D6_OPTION_BCMS_SERVER_A 34 90 #define D6_OPTION_FQDN 39 91 #define D6_OPTION_POSIX_TIMEZONE 41 92 #define D6_OPTION_TZDB_TIMEZONE 42 93 #define D6_OPTION_PD_EXCLUDE 67 94 #define D6_OPTION_SOL_MAX_RT 82 95 #define D6_OPTION_INF_MAX_RT 83 96 #define D6_OPTION_MUDURL 112 97 98 #define D6_FQDN_PTR 0x00 99 #define D6_FQDN_BOTH 0x01 100 #define D6_FQDN_NONE 0x04 101 102 #include "dhcp.h" 103 #include "ipv6.h" 104 105 #define D6_STATUS_OK 0 106 #define D6_STATUS_FAIL 1 107 #define D6_STATUS_NOADDR 2 108 #define D6_STATUS_NOBINDING 3 109 #define D6_STATUS_NOTONLINK 4 110 #define D6_STATUS_USEMULTICAST 5 111 112 #define SOL_MAX_DELAY 1 113 #define SOL_TIMEOUT 1 114 #define SOL_MAX_RT 3600 /* RFC7083 */ 115 #define SOL_MAX_RC 0 116 #define REQ_MAX_DELAY 0 117 #define REQ_TIMEOUT 1 118 #define REQ_MAX_RT 30 119 #define REQ_MAX_RC 10 120 #define CNF_MAX_DELAY 1 121 #define CNF_TIMEOUT 1 122 #define CNF_MAX_RT 4 123 #define CNF_MAX_RC 0 124 #define CNF_MAX_RD 10 125 #define REN_MAX_DELAY 0 126 #define REN_TIMEOUT 10 127 #define REN_MAX_RT 600 128 #define REB_MAX_DELAY 0 129 #define REB_TIMEOUT 10 130 #define REB_MAX_RT 600 131 #define INF_MAX_DELAY 1 132 #define INF_TIMEOUT 1 133 #define INF_MAX_RD CNF_MAX_RD /* NOT RFC defined */ 134 #define INF_MAX_RT 3600 /* RFC7083 */ 135 #define REL_MAX_DELAY 0 136 #define REL_TIMEOUT 1 137 #define REL_MAX_RT 0 138 #define REL_MAX_RC 5 139 #define DEC_MAX_DELAY 0 140 #define DEC_TIMEOUT 1 141 #define DEC_MAX_RC 5 142 #define REC_MAX_DELAY 0 143 #define REC_TIMEOUT 2 144 #define REC_MAX_RC 8 145 #define HOP_COUNT_LIMIT 32 146 147 /* RFC4242 3.1 */ 148 #define IRT_DEFAULT 86400 149 #define IRT_MINIMUM 600 150 151 #define DHCP6_RAND_MIN -100 152 #define DHCP6_RAND_MAX 100 153 154 enum DH6S { 155 DH6S_INIT, 156 DH6S_DISCOVER, 157 DH6S_REQUEST, 158 DH6S_BOUND, 159 DH6S_RENEW, 160 DH6S_REBIND, 161 DH6S_CONFIRM, 162 DH6S_INFORM, 163 DH6S_INFORMED, 164 DH6S_RENEW_REQUESTED, 165 DH6S_PROBE, 166 DH6S_DELEGATED, 167 DH6S_TIMEDOUT, 168 DH6S_ITIMEDOUT, 169 DH6S_RELEASE, 170 DH6S_RELEASED 171 }; 172 173 struct dhcp6_state { 174 enum DH6S state; 175 struct timespec started; 176 177 /* Message retransmission timings */ 178 struct timespec RT; 179 unsigned int IMD; 180 unsigned int RTC; 181 time_t IRT; 182 unsigned int MRC; 183 time_t MRT; 184 void (*MRCcallback)(void *); 185 time_t sol_max_rt; 186 time_t inf_max_rt; 187 188 struct dhcp6_message *send; 189 size_t send_len; 190 struct dhcp6_message *recv; 191 size_t recv_len; 192 struct dhcp6_message *new; 193 size_t new_len; 194 struct dhcp6_message *old; 195 size_t old_len; 196 197 struct timespec acquired; 198 uint32_t renew; 199 uint32_t rebind; 200 uint32_t expire; 201 struct in6_addr unicast; 202 struct ipv6_addrhead addrs; 203 uint32_t lowpl; 204 /* The +3 is for the possible .pd extension for prefix delegation */ 205 char leasefile[sizeof(LEASEFILE6) + IF_NAMESIZE + (IF_SSIDLEN * 4) +3]; 206 const char *reason; 207 208 struct authstate auth; 209 }; 210 211 #define D6_STATE(ifp) \ 212 ((struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6]) 213 #define D6_CSTATE(ifp) \ 214 ((const struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6]) 215 #define D6_STATE_RUNNING(ifp) \ 216 (D6_CSTATE((ifp)) && \ 217 D6_CSTATE((ifp))->reason && dhcp6_dadcompleted((ifp))) 218 219 #ifdef DHCP6 220 void dhcp6_printoptions(const struct dhcpcd_ctx *, 221 const struct dhcp_opt *, size_t); 222 const struct ipv6_addr *dhcp6_iffindaddr(const struct interface *ifp, 223 const struct in6_addr *addr, unsigned int flags); 224 struct ipv6_addr *dhcp6_findaddr(struct dhcpcd_ctx *, const struct in6_addr *, 225 unsigned int); 226 size_t dhcp6_find_delegates(struct interface *); 227 int dhcp6_start(struct interface *, enum DH6S); 228 void dhcp6_reboot(struct interface *); 229 void dhcp6_renew(struct interface *); 230 ssize_t dhcp6_env(char **, const char *, const struct interface *, 231 const struct dhcp6_message *, size_t); 232 void dhcp6_free(struct interface *); 233 void dhcp6_handleifa(int, struct ipv6_addr *, pid_t); 234 int dhcp6_dadcompleted(const struct interface *); 235 void dhcp6_drop(struct interface *, const char *); 236 void dhcp6_dropnondelegates(struct interface *ifp); 237 int dhcp6_dump(struct interface *); 238 #else 239 #define dhcp6_printoptions(a, b, c) {} 240 #define dhcp6_iffindaddr(a, b, c) (NULL) 241 #define dhcp6_findaddr(a, b, c) (NULL) 242 #define dhcp6_find_delegates(a) {} 243 #define dhcp6_start(a, b) (0) 244 #define dhcp6_reboot(a) {} 245 #define dhcp6_renew(a) {} 246 #define dhcp6_env(a, b, c, d, e) (0) 247 #define dhcp6_free(a) {} 248 #define dhcp6_dadcompleted(a) (0) 249 #define dhcp6_drop(a, b) {} 250 #define dhcp6_dropnondelegates(a) {} 251 #define dhcp6_dump(a) (-1) 252 #endif 253 254 #endif 255