src/libsystemd-network/dhcp-server-internal.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 /***
   5   Copyright © 2013 Intel Corporation. All rights reserved.
   6 ***/
   7
   8 #include "sd-dhcp-server.h"
   9 #include "sd-event.h"
  10
  11 #include "dhcp-internal.h"
  12 #include "network-common.h"
  13 #include "ordered-set.h"
  14 #include "time-util.h"
  15
  16 typedef enum DHCPRawOption {
  17         DHCP_RAW_OPTION_DATA_UINT8,
  18         DHCP_RAW_OPTION_DATA_UINT16,
  19         DHCP_RAW_OPTION_DATA_UINT32,
  20         DHCP_RAW_OPTION_DATA_STRING,
  21         DHCP_RAW_OPTION_DATA_IPV4ADDRESS,
  22         DHCP_RAW_OPTION_DATA_IPV6ADDRESS,
  23         _DHCP_RAW_OPTION_DATA_MAX,
  24         _DHCP_RAW_OPTION_DATA_INVALID,
  25 } DHCPRawOption;
  26
  27 typedef struct DHCPClientId {
  28         size_t length;
  29         uint8_t *data;
  30 } DHCPClientId;
  31
  32 typedef struct DHCPLease {
  33         sd_dhcp_server *server;
  34
  35         DHCPClientId client_id;
  36
  37         uint8_t htype; /* e.g. ARPHRD_ETHER */
  38         uint8_t hlen;  /* e.g. ETH_ALEN */
  39         be32_t address;
  40         be32_t gateway;
  41         uint8_t chaddr[16];
  42         usec_t expiration;
  43 } DHCPLease;
  44
  45 struct sd_dhcp_server {
  46         unsigned n_ref;
  47
  48         sd_event *event;
  49         int event_priority;
  50         sd_event_source *receive_message;
  51         sd_event_source *receive_broadcast;
  52         int fd;
  53         int fd_raw;
  54         int fd_broadcast;
  55
  56         int ifindex;
  57         char *ifname;
  58         bool bind_to_interface;
  59         be32_t address;
  60         be32_t netmask;
  61         be32_t subnet;
  62         uint32_t pool_offset;
  63         uint32_t pool_size;
  64
  65         char *timezone;
  66
  67         DHCPServerData servers[_SD_DHCP_LEASE_SERVER_TYPE_MAX];
  68         struct in_addr boot_server_address;
  69         char *boot_server_name;
  70         char *boot_filename;
  71
  72         OrderedSet *extra_options;
  73         OrderedSet *vendor_options;
  74
  75         bool emit_router;
  76         struct in_addr router_address;
  77
  78         Hashmap *bound_leases_by_client_id;
  79         Hashmap *bound_leases_by_address;
  80         Hashmap *static_leases_by_client_id;
  81         Hashmap *static_leases_by_address;
  82
  83         uint32_t max_lease_time, default_lease_time;
  84
  85         sd_dhcp_server_callback_t callback;
  86         void *callback_userdata;
  87
  88         struct in_addr relay_target;
  89
  90         char *agent_circuit_id;
  91         char *agent_remote_id;
  92 };
  93
  94 typedef struct DHCPRequest {
  95         /* received message */
  96         DHCPMessage *message;
  97
  98         /* options */
  99         DHCPClientId client_id;
 100         size_t max_optlen;
 101         be32_t server_id;
 102         be32_t requested_ip;
 103         uint32_t lifetime;
 104         const uint8_t *agent_info_option;
 105 } DHCPRequest;
 106
 107 extern const struct hash_ops dhcp_lease_hash_ops;
 108
 109 int dhcp_server_handle_message(sd_dhcp_server *server, DHCPMessage *message,
 110                                size_t length);
 111 int dhcp_server_send_packet(sd_dhcp_server *server,
 112                             DHCPRequest *req, DHCPPacket *packet,
 113                             int type, size_t optoffset);
 114
 115 void client_id_hash_func(const DHCPClientId *p, struct siphash *state);
 116 int client_id_compare_func(const DHCPClientId *a, const DHCPClientId *b);
 117
 118 #define log_dhcp_server_errno(server, error, fmt, ...)          \
 119         log_interface_prefix_full_errno(                        \
 120                 "DHCPv4 server: ",                              \
 121                 sd_dhcp_server, server,                         \
 122                 error, fmt, ##__VA_ARGS__)
 123 #define log_dhcp_server(server, fmt, ...)                       \
 124         log_interface_prefix_full_errno_zerook(                 \
 125                 "DHCPv4 server: ",                              \
 126                 sd_dhcp_server, server,                         \
 127                 0, fmt, ##__VA_ARGS__)