1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright (C) 2013 Intel Corporation. All rights reserved.
8 Copyright (C) 2014 Tom Gundersen
11 #include <linux/if_packet.h>
12 #include <net/ethernet.h>
13 #include <net/if_arp.h>
16 #include "sd-dhcp-client.h"
18 #include "dhcp-protocol.h"
19 #include "socket-util.h"
21 int dhcp_network_bind_raw_socket(int ifindex
, union sockaddr_union
*link
,
22 uint32_t xid
, const uint8_t *mac_addr
,
23 size_t mac_addr_len
, uint16_t arp_type
,
25 int dhcp_network_bind_udp_socket(int ifindex
, be32_t address
, uint16_t port
);
26 int dhcp_network_send_raw_socket(int s
, const union sockaddr_union
*link
,
27 const void *packet
, size_t len
);
28 int dhcp_network_send_udp_socket(int s
, be32_t address
, uint16_t port
,
29 const void *packet
, size_t len
);
31 int dhcp_option_append(DHCPMessage
*message
, size_t size
, size_t *offset
, uint8_t overload
,
32 uint8_t code
, size_t optlen
, const void *optval
);
34 typedef int (*dhcp_option_callback_t
)(uint8_t code
, uint8_t len
,
35 const void *option
, void *userdata
);
37 int dhcp_option_parse(DHCPMessage
*message
, size_t len
, dhcp_option_callback_t cb
, void *userdata
, char **error_message
);
39 int dhcp_message_init(DHCPMessage
*message
, uint8_t op
, uint32_t xid
,
40 uint8_t type
, uint16_t arp_type
, size_t optlen
,
43 uint16_t dhcp_packet_checksum(uint8_t *buf
, size_t len
);
45 void dhcp_packet_append_ip_headers(DHCPPacket
*packet
, be32_t source_addr
,
46 uint16_t source
, be32_t destination_addr
,
47 uint16_t destination
, uint16_t len
);
49 int dhcp_packet_verify_headers(DHCPPacket
*packet
, size_t len
, bool checksum
, uint16_t port
);
51 /* If we are invoking callbacks of a dhcp-client, ensure unreffing the
52 * client from the callback doesn't destroy the object we are working
54 #define DHCP_CLIENT_DONT_DESTROY(client) \
55 _cleanup_(sd_dhcp_client_unrefp) _unused_ sd_dhcp_client *_dont_destroy_##client = sd_dhcp_client_ref(client)
57 #define log_dhcp_client_errno(client, error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "DHCP CLIENT (0x%x): " fmt, client->xid, ##__VA_ARGS__)
58 #define log_dhcp_client(client, fmt, ...) log_dhcp_client_errno(client, 0, fmt, ##__VA_ARGS__)