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