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

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright (C) 2013 Intel Corporation. All rights reserved.
   8   Copyright (C) 2014 Tom Gundersen
   9 ***/
  10
  11 #include "sd-dhcp-server.h"
  12 #include "sd-event.h"
  13
  14 #include "dhcp-internal.h"
  15 #include "hashmap.h"
  16 #include "log.h"
  17 #include "util.h"
  18
  19 typedef struct DHCPClientId {
  20         size_t length;
  21         void *data;
  22 } DHCPClientId;
  23
  24 typedef struct DHCPLease {
  25         DHCPClientId client_id;
  26
  27         be32_t address;
  28         be32_t gateway;
  29         uint8_t chaddr[16];
  30         usec_t expiration;
  31 } DHCPLease;
  32
  33 struct sd_dhcp_server {
  34         unsigned n_ref;
  35
  36         sd_event *event;
  37         int event_priority;
  38         sd_event_source *receive_message;
  39         int fd;
  40         int fd_raw;
  41
  42         int ifindex;
  43         be32_t address;
  44         be32_t netmask;
  45         be32_t subnet;
  46         uint32_t pool_offset;
  47         uint32_t pool_size;
  48
  49         char *timezone;
  50
  51         struct in_addr *ntp, *dns;
  52         unsigned n_ntp, n_dns;
  53
  54         bool emit_router;
  55
  56         Hashmap *leases_by_client_id;
  57         DHCPLease **bound_leases;
  58         DHCPLease invalid_lease;
  59
  60         uint32_t max_lease_time, default_lease_time;
  61 };
  62
  63 typedef struct DHCPRequest {
  64         /* received message */
  65         DHCPMessage *message;
  66
  67         /* options */
  68         DHCPClientId client_id;
  69         size_t max_optlen;
  70         be32_t server_id;
  71         be32_t requested_ip;
  72         uint32_t lifetime;
  73 } DHCPRequest;
  74
  75 #define log_dhcp_server(client, fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "DHCP SERVER: " fmt, ##__VA_ARGS__)
  76 #define log_dhcp_server_errno(client, error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "DHCP SERVER: " fmt, ##__VA_ARGS__)
  77
  78 int dhcp_server_handle_message(sd_dhcp_server *server, DHCPMessage *message,
  79                                size_t length);
  80 int dhcp_server_send_packet(sd_dhcp_server *server,
  81                             DHCPRequest *req, DHCPPacket *packet,
  82                             int type, size_t optoffset);
  83
  84 void client_id_hash_func(const void *p, struct siphash *state);
  85 int client_id_compare_func(const void *_a, const void *_b);