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

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