Samuel Tan | d7ed851 | 2015-08-13 16:11:35 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dhcpcd - DHCP client daemon |
| 3 | * Copyright (c) 2006-2015 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 | |
| 96 | #define D6_FQDN_PTR 0x00 |
| 97 | #define D6_FQDN_BOTH 0x01 |
| 98 | #define D6_FQDN_NONE 0x04 |
| 99 | |
| 100 | #include "dhcp.h" |
| 101 | #include "ipv6.h" |
| 102 | |
| 103 | struct dhcp6_message { |
| 104 | uint8_t type; |
| 105 | uint8_t xid[3]; |
| 106 | /* followed by options */ |
| 107 | } __packed; |
| 108 | |
| 109 | struct dhcp6_option { |
| 110 | uint16_t code; |
| 111 | uint16_t len; |
| 112 | /* followed by data */ |
| 113 | } __packed; |
| 114 | |
| 115 | #define D6_STATUS_OK 0 |
| 116 | #define D6_STATUS_FAIL 1 |
| 117 | #define D6_STATUS_NOADDR 2 |
| 118 | #define D6_STATUS_NOBINDING 3 |
| 119 | #define D6_STATUS_NOTONLINK 4 |
| 120 | #define D6_STATUS_USEMULTICAST 5 |
| 121 | |
| 122 | #define SOL_MAX_DELAY 1 |
| 123 | #define SOL_TIMEOUT 1 |
| 124 | #define SOL_MAX_RT 3600 /* RFC7083 */ |
| 125 | #define REQ_TIMEOUT 1 |
| 126 | #define REQ_MAX_RT 30 |
| 127 | #define REQ_MAX_RC 10 |
| 128 | #define CNF_MAX_DELAY 1 |
| 129 | #define CNF_TIMEOUT 1 |
| 130 | #define CNF_MAX_RT 4 |
| 131 | #define CNF_MAX_RD 10 |
| 132 | #define REN_TIMEOUT 10 |
| 133 | #define REN_MAX_RT 600 |
| 134 | #define REB_TIMEOUT 10 |
| 135 | #define REB_MAX_RT 600 |
| 136 | #define INF_MAX_DELAY 1 |
| 137 | #define INF_TIMEOUT 1 |
| 138 | #define INF_MAX_RT 3600 /* RFC7083 */ |
| 139 | #define REL_TIMEOUT 1 |
| 140 | #define REL_MAX_RC 5 |
| 141 | #define DEC_TIMEOUT 1 |
| 142 | #define DEC_MAX_RC 5 |
| 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_RELEASE |
| 168 | }; |
| 169 | |
| 170 | struct dhcp6_state { |
| 171 | enum DH6S state; |
| 172 | time_t start_uptime; |
| 173 | |
| 174 | /* Message retransmission timings */ |
| 175 | struct timespec RT; |
| 176 | unsigned int IMD; |
| 177 | unsigned int RTC; |
| 178 | time_t IRT; |
| 179 | unsigned int MRC; |
| 180 | time_t MRT; |
| 181 | void (*MRCcallback)(void *); |
| 182 | time_t sol_max_rt; |
| 183 | time_t inf_max_rt; |
| 184 | |
| 185 | struct dhcp6_message *send; |
| 186 | size_t send_len; |
| 187 | struct dhcp6_message *recv; |
| 188 | size_t recv_len; |
| 189 | struct dhcp6_message *new; |
| 190 | size_t new_len; |
| 191 | struct dhcp6_message *old; |
| 192 | size_t old_len; |
| 193 | |
| 194 | uint32_t renew; |
| 195 | uint32_t rebind; |
| 196 | uint32_t expire; |
| 197 | struct in6_addr unicast; |
| 198 | struct ipv6_addrhead addrs; |
| 199 | uint32_t lowpl; |
| 200 | /* The +3 is for the possible .pd extension for prefix delegation */ |
| 201 | char leasefile[sizeof(LEASEFILE6) + IF_NAMESIZE + (IF_SSIDSIZE * 4) +3]; |
| 202 | const char *reason; |
| 203 | |
| 204 | struct authstate auth; |
| 205 | }; |
| 206 | |
| 207 | #define D6_STATE(ifp) \ |
| 208 | ((struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6]) |
| 209 | #define D6_CSTATE(ifp) \ |
| 210 | ((const struct dhcp6_state *)(ifp)->if_data[IF_DATA_DHCP6]) |
| 211 | #define D6_STATE_RUNNING(ifp) \ |
| 212 | (D6_CSTATE((ifp)) && \ |
| 213 | D6_CSTATE((ifp))->reason && dhcp6_dadcompleted((ifp))) |
| 214 | |
| 215 | #define D6_FIRST_OPTION(m) \ |
| 216 | ((struct dhcp6_option *) \ |
| 217 | ((uint8_t *)(m) + sizeof(struct dhcp6_message))) |
| 218 | #define D6_NEXT_OPTION(o) \ |
| 219 | ((struct dhcp6_option *) \ |
| 220 | (((uint8_t *)o) + sizeof(struct dhcp6_option) + ntohs((o)->len))) |
| 221 | #define D6_OPTION_DATA(o) \ |
| 222 | ((uint8_t *)(o) + sizeof(struct dhcp6_option)) |
| 223 | #define D6_CFIRST_OPTION(m) \ |
| 224 | ((const struct dhcp6_option *) \ |
| 225 | ((const uint8_t *)(m) + sizeof(struct dhcp6_message))) |
| 226 | #define D6_CNEXT_OPTION(o) \ |
| 227 | ((const struct dhcp6_option *) \ |
| 228 | (((const uint8_t *)o) + sizeof(struct dhcp6_option) + ntohs((o)->len))) |
| 229 | #define D6_COPTION_DATA(o) \ |
| 230 | ((const uint8_t *)(o) + sizeof(struct dhcp6_option)) |
| 231 | |
| 232 | #ifdef INET6 |
| 233 | void dhcp6_printoptions(const struct dhcpcd_ctx *, |
| 234 | const struct dhcp_opt *, size_t); |
| 235 | struct ipv6_addr *dhcp6_findaddr(struct dhcpcd_ctx *, const struct in6_addr *, |
| 236 | short); |
| 237 | size_t dhcp6_find_delegates(struct interface *); |
| 238 | int dhcp6_has_public_addr(const struct interface *); |
| 239 | int dhcp6_start(struct interface *, enum DH6S); |
| 240 | void dhcp6_reboot(struct interface *); |
| 241 | ssize_t dhcp6_env(char **, const char *, const struct interface *, |
| 242 | const struct dhcp6_message *, size_t); |
| 243 | void dhcp6_free(struct interface *); |
| 244 | void dhcp6_handleifa(struct dhcpcd_ctx *, int, const char *, |
| 245 | const struct in6_addr *addr, int); |
| 246 | int dhcp6_dadcompleted(const struct interface *); |
| 247 | void dhcp6_drop(struct interface *, const char *); |
| 248 | int dhcp6_dump(struct interface *); |
| 249 | #else |
| 250 | #define dhcp6_findaddr(a, b, c) (0) |
| 251 | #define dhcp6_find_delegates(a) {} |
| 252 | #define dhcp6_start(a, b) (0) |
| 253 | #define dhcp6_reboot(a) {} |
| 254 | #define dhcp6_env(a, b, c, d, e) {} |
| 255 | #define dhcp6_free(a) {} |
| 256 | #define dhcp6_dadcompleted(a) (0) |
| 257 | #define dhcp6_drop(a, b) {} |
| 258 | #define dhcp6_dump(a) (-1) |
| 259 | #endif |
| 260 | |
| 261 | #endif |