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 <linux/if_packet.h> 9 #include <net/ethernet.h> 10 #include <stdint.h> 11 12 #include "sd-dhcp-client.h" 13 14 #include "dhcp-protocol.h" 15 #include "network-common.h" 16 #include "socket-util.h" 17 18 typedef struct sd_dhcp_option { 19 unsigned n_ref; 20 21 uint8_t option; 22 void *data; 23 size_t length; 24 } sd_dhcp_option; 25 26 typedef struct DHCPServerData { 27 struct in_addr *addr; 28 size_t size; 29 } DHCPServerData; 30 31 extern const struct hash_ops dhcp_option_hash_ops; 32 33 typedef struct sd_dhcp_client sd_dhcp_client; 34 35 int dhcp_network_bind_raw_socket(int ifindex, union sockaddr_union *link, uint32_t xid, 36 const uint8_t *mac_addr, size_t mac_addr_len, 37 const uint8_t *bcast_addr, size_t bcast_addr_len, 38 uint16_t arp_type, uint16_t port); 39 int dhcp_network_bind_udp_socket(int ifindex, be32_t address, uint16_t port, int ip_service_type); 40 int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link, 41 const void *packet, size_t len); 42 int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port, 43 const void *packet, size_t len); 44 45 int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, uint8_t overload, 46 uint8_t code, size_t optlen, const void *optval); 47 int dhcp_option_find_option(uint8_t *options, size_t length, uint8_t wanted_code, size_t *ret_offset); 48 int dhcp_option_remove_option(uint8_t *options, size_t buflen, uint8_t option_code); 49 50 typedef int (*dhcp_option_callback_t)(uint8_t code, uint8_t len, 51 const void *option, void *userdata); 52 53 int dhcp_option_parse(DHCPMessage *message, size_t len, dhcp_option_callback_t cb, void *userdata, char **error_message); 54 55 int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid, 56 uint8_t type, uint16_t arp_type, uint8_t hlen, const uint8_t *chaddr, 57 size_t optlen, size_t *optoffset); 58 59 uint16_t dhcp_packet_checksum(uint8_t *buf, size_t len); 60 61 void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr, 62 uint16_t source, be32_t destination_addr, 63 uint16_t destination, uint16_t len, int ip_service_type); 64 65 int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len, bool checksum, uint16_t port); 66 67 void dhcp_client_set_test_mode(sd_dhcp_client *client, bool test_mode); 68 69 /* If we are invoking callbacks of a dhcp-client, ensure unreffing the 70 * client from the callback doesn't destroy the object we are working 71 * on */ 72 #define DHCP_CLIENT_DONT_DESTROY(client) \ 73 _cleanup_(sd_dhcp_client_unrefp) _unused_ sd_dhcp_client *_dont_destroy_##client = sd_dhcp_client_ref(client) 74 75 #define log_dhcp_client_errno(client, error, fmt, ...) \ 76 log_interface_prefix_full_errno( \ 77 "DHCPv4 client: ", \ 78 sd_dhcp_client, client, \ 79 error, fmt, ##__VA_ARGS__) 80 #define log_dhcp_client(client, fmt, ...) \ 81 log_interface_prefix_full_errno_zerook( \ 82 "DHCPv4 client: ", \ 83 sd_dhcp_client, client, \ 84 0, fmt, ##__VA_ARGS__) 85