release/src/router/busybox/networking/udhcp/d6_common.h

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