1 | /* |
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2 | * dhcpcd - DHCP client daemon |
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3 | * Copyright (c) 2006-2013 Roy Marples <roy@marples.name> |
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4 | * All rights reserved |
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5 | |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions |
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8 | * are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * |
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15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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25 | * SUCH DAMAGE. |
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26 | */ |
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27 | |
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28 | #ifndef IPV6ND_H |
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29 | #define IPV6ND_H |
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30 | |
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31 | #include <sys/queue.h> |
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32 | |
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33 | #include <time.h> |
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34 | |
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35 | #include "dhcpcd.h" |
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36 | #include "ipv6.h" |
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37 | |
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38 | struct ra_opt { |
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39 | TAILQ_ENTRY(ra_opt) next; |
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40 | uint8_t type; |
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41 | struct timeval expire; |
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42 | char *option; |
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43 | }; |
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44 | |
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45 | struct ra { |
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46 | TAILQ_ENTRY(ra) next; |
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47 | struct interface *iface; |
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48 | struct in6_addr from; |
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49 | char sfrom[INET6_ADDRSTRLEN]; |
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50 | unsigned char *data; |
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51 | ssize_t data_len; |
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52 | struct timeval received; |
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53 | unsigned char flags; |
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54 | uint32_t lifetime; |
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55 | uint32_t reachable; |
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56 | uint32_t retrans; |
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57 | uint32_t mtu; |
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58 | struct ipv6_addrhead addrs; |
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59 | TAILQ_HEAD(, ra_opt) options; |
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60 | |
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61 | unsigned char *ns; |
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62 | size_t nslen; |
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63 | int nsprobes; |
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64 | |
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65 | int expired; |
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66 | }; |
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67 | |
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68 | extern TAILQ_HEAD(rahead, ra) ipv6_routers; |
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69 | |
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70 | struct rs_state { |
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71 | unsigned char *rs; |
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72 | size_t rslen; |
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73 | int rsprobes; |
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74 | }; |
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75 | |
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76 | #define RS_STATE(a) ((struct rs_state *)(ifp)->if_data[IF_DATA_IPV6ND]) |
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77 | |
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78 | #define MAX_REACHABLE_TIME 3600 /* seconds */ |
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79 | #define REACHABLE_TIME 30 /* seconds */ |
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80 | #define RETRANS_TIMER 1000 /* milliseconds */ |
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81 | #define DELAY_FIRST_PROBE_TIME 5 /* seconds */ |
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82 | |
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83 | #ifdef INET6 |
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84 | int ipv6nd_startrs(struct interface *); |
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85 | ssize_t ipv6nd_env(char **, const char *, const struct interface *); |
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86 | int ipv6nd_addrexists(const struct ipv6_addr *); |
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87 | void ipv6nd_freedrop_ra(struct ra *, int); |
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88 | #define ipv6nd_free_ra(ra) ipv6nd_freedrop_ra((ra), 0) |
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89 | #define ipv6nd_drop_ra(ra) ipv6nd_freedrop_ra((ra), 1) |
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90 | ssize_t ipv6nd_free(struct interface *); |
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91 | void ipv6nd_expirera(void *arg); |
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92 | int ipv6nd_has_ra(const struct interface *); |
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93 | void ipv6nd_handleifa(int, const char *, const struct in6_addr *, int); |
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94 | void ipv6nd_drop(struct interface *); |
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95 | |
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96 | void ipv6nd_probeaddr(void *); |
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97 | ssize_t ipv6nd_probeaddrs(struct ipv6_addrhead *); |
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98 | void ipv6nd_proberouter(void *); |
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99 | void ipv6nd_cancelproberouter(struct ra *); |
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100 | |
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101 | #ifdef LISTEN_DAD |
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102 | void ipv6nd_cancelprobeaddr(struct ipv6_addr *); |
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103 | #else |
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104 | #define ipv6nd_cancelprobeaddr(a) |
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105 | #endif |
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106 | |
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107 | #else |
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108 | #define ipv6nd_startrs(a) {} |
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109 | #define ipv6nd_addrexists(a) (0) |
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110 | #define ipv6nd_free(a) |
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111 | #define ipv6nd_has_ra(a) 0 |
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112 | #define ipv6nd_drop(a) |
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113 | #endif |
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114 | |
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115 | #endif |
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