1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Copyright (C) 2011 Denys Vlasenko.
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4 | *
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5 | * Licensed under GPLv2, see file LICENSE in this source tree.
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6 | */
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7 | #ifndef UDHCP_D6_COMMON_H
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8 | #define UDHCP_D6_COMMON_H 1
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9 |
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10 | #include <netinet/ip6.h>
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11 |
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12 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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13 |
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14 |
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15 | /*** DHCPv6 packet ***/
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16 |
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17 | /* DHCPv6 protocol. See RFC 3315 */
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18 | #define D6_MSG_SOLICIT 1
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19 | #define D6_MSG_ADVERTISE 2
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20 | #define D6_MSG_REQUEST 3
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21 | #define D6_MSG_CONFIRM 4
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22 | #define D6_MSG_RENEW 5
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23 | #define D6_MSG_REBIND 6
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24 | #define D6_MSG_REPLY 7
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25 | #define D6_MSG_RELEASE 8
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26 | #define D6_MSG_DECLINE 9
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27 | #define D6_MSG_RECONFIGURE 10
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28 | #define D6_MSG_INFORMATION_REQUEST 11
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29 | #define D6_MSG_RELAY_FORW 12
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30 | #define D6_MSG_RELAY_REPL 13
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31 |
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32 | struct d6_packet {
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33 | union {
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34 | uint8_t d6_msg_type;
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35 | uint32_t d6_xid32;
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36 | } d6_u;
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37 | uint8_t d6_options[576 - sizeof(struct iphdr) - sizeof(struct udphdr) - 4
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38 | + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
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39 | } PACKED;
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40 | #define d6_msg_type d6_u.d6_msg_type
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41 | #define d6_xid32 d6_u.d6_xid32
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42 |
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43 | struct ip6_udp_d6_packet {
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44 | struct ip6_hdr ip6;
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45 | struct udphdr udp;
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46 | struct d6_packet data;
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47 | } PACKED;
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48 |
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49 | struct udp_d6_packet {
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50 | struct udphdr udp;
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51 | struct d6_packet data;
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52 | } PACKED;
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53 |
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54 | /*** Options ***/
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55 |
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56 | struct d6_option {
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57 | uint8_t code_hi;
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58 | uint8_t code;
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59 | uint8_t len_hi;
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60 | uint8_t len;
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61 | uint8_t data[1];
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62 | } PACKED;
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63 |
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64 | #define D6_OPT_CLIENTID 1
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65 | #define D6_OPT_SERVERID 2
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66 | #define D6_OPT_IA_NA 3
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67 | #define D6_OPT_IA_TA 4
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68 | #define D6_OPT_IAADDR 5
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69 | #define D6_OPT_ORO 6
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70 | #define D6_OPT_PREFERENCE 7
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71 | #define D6_OPT_ELAPSED_TIME 8
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72 | #define D6_OPT_RELAY_MSG 9
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73 | #define D6_OPT_AUTH 11
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74 | #define D6_OPT_UNICAST 12
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75 | #define D6_OPT_STATUS_CODE 13
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76 | #define D6_OPT_RAPID_COMMIT 14
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77 | #define D6_OPT_USER_CLASS 15
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78 | #define D6_OPT_VENDOR_CLASS 16
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79 | #define D6_OPT_VENDOR_OPTS 17
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80 | #define D6_OPT_INTERFACE_ID 18
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81 | #define D6_OPT_RECONF_MSG 19
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82 | #define D6_OPT_RECONF_ACCEPT 20
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83 |
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84 | #define D6_OPT_IA_PD 25
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85 | #define D6_OPT_IAPREFIX 26
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86 |
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87 | /*** Other shared functions ***/
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88 |
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89 | struct client6_data_t {
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90 | struct d6_option *server_id;
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91 | struct d6_option *ia_na;
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92 | char **env_ptr;
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93 | unsigned env_idx;
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94 | };
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95 |
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96 | #define client6_data (*(struct client6_data_t*)(&bb_common_bufsiz1[COMMON_BUFSIZE - sizeof(struct client6_data_t)]))
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97 |
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98 | int FAST_FUNC d6_listen_socket(int port, const char *inf);
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99 |
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100 | int FAST_FUNC d6_recv_kernel_packet(
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101 | struct in6_addr *peer_ipv6,
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102 | struct d6_packet *packet, int fd
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103 | );
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104 |
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105 | int FAST_FUNC d6_send_raw_packet(
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106 | struct d6_packet *d6_pkt, unsigned d6_pkt_size,
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107 | struct in6_addr *src_ipv6, int source_port,
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108 | struct in6_addr *dst_ipv6, int dest_port, const uint8_t *dest_arp,
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109 | int ifindex
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110 | );
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111 |
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112 | int FAST_FUNC d6_send_kernel_packet(
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113 | struct d6_packet *d6_pkt, unsigned d6_pkt_size,
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114 | struct in6_addr *src_ipv6, int source_port,
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115 | struct in6_addr *dst_ipv6, int dest_port
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116 | );
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117 |
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118 | #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
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119 | void FAST_FUNC d6_dump_packet(struct d6_packet *packet);
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120 | #else
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121 | # define d6_dump_packet(packet) ((void)0)
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122 | #endif
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123 |
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124 |
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125 | POP_SAVED_FUNCTION_VISIBILITY
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126 |
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127 | #endif
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