/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright (C) 2013 Intel Corporation. All rights reserved. Copyright (C) 2014 Tom Gundersen systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include "sd-event.h" #include "sd-dhcp-server.h" #include "hashmap.h" #include "refcnt.h" #include "util.h" #include "log.h" #include "dhcp-internal.h" typedef struct DHCPClientId { size_t length; uint8_t *data; } DHCPClientId; typedef struct DHCPLease { DHCPClientId client_id; be32_t address; be32_t gateway; uint8_t chaddr[16]; usec_t expiration; } DHCPLease; struct sd_dhcp_server { RefCount n_ref; sd_event *event; int event_priority; sd_event_source *receive_message; int fd; int fd_raw; int index; be32_t address; be32_t netmask; be32_t pool_start; size_t pool_size; size_t next_offer; Hashmap *leases_by_client_id; DHCPLease **bound_leases; }; typedef struct DHCPRequest { /* received message */ DHCPMessage *message; /* options */ DHCPClientId client_id; size_t max_optlen; be32_t server_id; be32_t requested_ip; int lifetime; } DHCPRequest; DEFINE_TRIVIAL_CLEANUP_FUNC(sd_dhcp_server*, sd_dhcp_server_unref); #define _cleanup_dhcp_server_unref_ _cleanup_(sd_dhcp_server_unrefp) #define log_dhcp_server(client, fmt, ...) log_meta(LOG_DEBUG, __FILE__, __LINE__, __func__, "DHCP SERVER: " fmt, ##__VA_ARGS__) int dhcp_server_handle_message(sd_dhcp_server *server, DHCPMessage *message, size_t length); int dhcp_server_send_packet(sd_dhcp_server *server, DHCPRequest *req, DHCPPacket *packet, int type, size_t optoffset); unsigned long client_id_hash_func(const void *p, const uint8_t hash_key[HASH_KEY_SIZE]); int client_id_compare_func(const void *_a, const void *_b);