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 "ordered-set.h"
  13 #include "log.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         void *data;
  30 } DHCPClientId;
  31
  32 typedef struct DHCPLease {
  33         DHCPClientId client_id;
  34
  35         be32_t address;
  36         be32_t gateway;
  37         uint8_t chaddr[16];
  38         usec_t expiration;
  39 } DHCPLease;
  40
  41 struct sd_dhcp_server {
  42         unsigned n_ref;
  43
  44         sd_event *event;
  45         int event_priority;
  46         sd_event_source *receive_message;
  47         int fd;
  48         int fd_raw;
  49
  50         int ifindex;
  51         char *ifname;
  52         be32_t address;
  53         be32_t netmask;
  54         be32_t subnet;
  55         uint32_t pool_offset;
  56         uint32_t pool_size;
  57
  58         char *timezone;
  59
  60         DHCPServerData servers[_SD_DHCP_LEASE_SERVER_TYPE_MAX];
  61
  62         OrderedSet *extra_options;
  63         OrderedSet *vendor_options;
  64
  65         bool emit_router;
  66
  67         Hashmap *leases_by_client_id;
  68         DHCPLease **bound_leases;
  69         DHCPLease invalid_lease;
  70
  71         uint32_t max_lease_time, default_lease_time;
  72
  73         sd_dhcp_server_callback_t callback;
  74         void *callback_userdata;
  75 };
  76
  77 typedef struct DHCPRequest {
  78         /* received message */
  79         DHCPMessage *message;
  80
  81         /* options */
  82         DHCPClientId client_id;
  83         size_t max_optlen;
  84         be32_t server_id;
  85         be32_t requested_ip;
  86         uint32_t lifetime;
  87 } DHCPRequest;
  88
  89 #define log_dhcp_server(client, fmt, ...) log_internal(LOG_DEBUG, 0, PROJECT_FILE, __LINE__, __func__, "DHCP SERVER: " fmt, ##__VA_ARGS__)
  90 #define log_dhcp_server_errno(client, error, fmt, ...) log_internal(LOG_DEBUG, error, PROJECT_FILE, __LINE__, __func__, "DHCP SERVER: " fmt, ##__VA_ARGS__)
  91
  92 int dhcp_server_handle_message(sd_dhcp_server *server, DHCPMessage *message,
  93                                size_t length);
  94 int dhcp_server_send_packet(sd_dhcp_server *server,
  95                             DHCPRequest *req, DHCPPacket *packet,
  96                             int type, size_t optoffset);
  97
  98 void client_id_hash_func(const DHCPClientId *p, struct siphash *state);
  99 int client_id_compare_func(const DHCPClientId *a, const DHCPClientId *b);