src/libsystemd-network/dhcp6-internal.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 /***
   5   Copyright © 2014-2015 Intel Corporation. All rights reserved.
   6 ***/
   7
   8 #include <net/ethernet.h>
   9 #include <netinet/in.h>
  10
  11 #include "sd-event.h"
  12 #include "sd-dhcp6-client.h"
  13
  14 #include "hashmap.h"
  15 #include "list.h"
  16 #include "log-link.h"
  17 #include "macro.h"
  18 #include "sparse-endian.h"
  19
  20 typedef struct sd_dhcp6_option {
  21         unsigned n_ref;
  22
  23         uint32_t enterprise_identifier;
  24         uint16_t option;
  25         void *data;
  26         size_t length;
  27 } sd_dhcp6_option;
  28
  29 extern const struct hash_ops dhcp6_option_hash_ops;
  30
  31 /* Common option header */
  32 typedef struct DHCP6Option {
  33         be16_t code;
  34         be16_t len;
  35         uint8_t data[];
  36 } _packed_ DHCP6Option;
  37
  38 /* Address option */
  39 struct iaaddr {
  40         struct in6_addr address;
  41         be32_t lifetime_preferred;
  42         be32_t lifetime_valid;
  43 } _packed_;
  44
  45 /* Prefix Delegation Prefix option */
  46 struct iapdprefix {
  47         be32_t lifetime_preferred;
  48         be32_t lifetime_valid;
  49         uint8_t prefixlen;
  50         struct in6_addr address;
  51 } _packed_;
  52
  53 typedef struct DHCP6Address DHCP6Address;
  54
  55 struct DHCP6Address {
  56         LIST_FIELDS(DHCP6Address, addresses);
  57
  58         union {
  59                 struct iaaddr iaaddr;
  60                 struct iapdprefix iapdprefix;
  61         };
  62 };
  63
  64 /* Non-temporary Address option */
  65 struct ia_na {
  66         be32_t id;
  67         be32_t lifetime_t1;
  68         be32_t lifetime_t2;
  69 } _packed_;
  70
  71 /* Prefix Delegation option */
  72 struct ia_pd {
  73         be32_t id;
  74         be32_t lifetime_t1;
  75         be32_t lifetime_t2;
  76 } _packed_;
  77
  78 /* Temporary Address option */
  79 struct ia_ta {
  80         be32_t id;
  81 } _packed_;
  82
  83 typedef struct DHCP6IA {
  84         uint16_t type;
  85         union {
  86                 struct ia_na ia_na;
  87                 struct ia_pd ia_pd;
  88                 struct ia_ta ia_ta;
  89         };
  90
  91         LIST_HEAD(DHCP6Address, addresses);
  92 } DHCP6IA;
  93
  94 int dhcp6_option_append(uint8_t **buf, size_t *buflen, uint16_t code,
  95                         size_t optlen, const void *optval);
  96 int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, const DHCP6IA *ia);
  97 int dhcp6_option_append_pd(uint8_t **buf, size_t *buflen, const DHCP6IA *pd, const DHCP6Address *hint_pd_prefix);
  98 int dhcp6_option_append_fqdn(uint8_t **buf, size_t *buflen, const char *fqdn);
  99 int dhcp6_option_append_user_class(uint8_t **buf, size_t *buflen, char * const *user_class);
 100 int dhcp6_option_append_vendor_class(uint8_t **buf, size_t *buflen, char * const *user_class);
 101 int dhcp6_option_append_vendor_option(uint8_t **buf, size_t *buflen, OrderedHashmap *vendor_options);
 102 int dhcp6_option_parse(uint8_t **buf, size_t *buflen, uint16_t *optcode,
 103                        size_t *optlen, uint8_t **optvalue);
 104 int dhcp6_option_parse_status(DHCP6Option *option, size_t len);
 105 int dhcp6_option_parse_ia(sd_dhcp6_client *client, DHCP6Option *iaoption, DHCP6IA *ia, uint16_t *ret_status_code);
 106 int dhcp6_option_parse_ip6addrs(uint8_t *optval, uint16_t optlen,
 107                                 struct in6_addr **addrs, size_t count,
 108                                 size_t *allocated);
 109 int dhcp6_option_parse_domainname_list(const uint8_t *optval, uint16_t optlen,
 110                                        char ***str_arr);
 111 int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char **str);
 112
 113 int dhcp6_network_bind_udp_socket(int ifindex, struct in6_addr *address);
 114 int dhcp6_network_send_udp_socket(int s, struct in6_addr *address,
 115                                   const void *packet, size_t len);
 116
 117 const char *dhcp6_message_type_to_string(int s) _const_;
 118 int dhcp6_message_type_from_string(const char *s) _pure_;
 119 const char *dhcp6_message_status_to_string(int s) _const_;
 120 int dhcp6_message_status_from_string(const char *s) _pure_;
 121
 122 #define log_dhcp6_client_errno(client, error, fmt, ...)                 \
 123         ({                                                              \
 124                 int _e = (error);                                       \
 125                 if (DEBUG_LOGGING)                                      \
 126                         log_interface_full_errno(                       \
 127                                     sd_dhcp6_client_get_ifname(client), \
 128                                     LOG_DEBUG, _e, "DHCPv6 client: " fmt, \
 129                                     ##__VA_ARGS__);                     \
 130                 -ERRNO_VALUE(_e);                                       \
 131         })
 132 #define log_dhcp6_client(client, fmt, ...)                       \
 133         log_dhcp6_client_errno(client, 0, fmt, ##__VA_ARGS__)