| /* |
| * |
| * Embedded Linux library |
| * |
| * Copyright (C) 2018 Intel Corporation. All rights reserved. |
| * |
| * This library 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. |
| * |
| * This library 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 this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| */ |
| |
| struct l_dhcp_client; |
| |
| /* RFC 2131, Figure 1 */ |
| struct dhcp_message { |
| uint8_t op; |
| uint8_t htype; |
| uint8_t hlen; |
| uint8_t hops; |
| __be32 xid; |
| __be16 secs; |
| __be16 flags; |
| uint32_t ciaddr; |
| uint32_t yiaddr; |
| uint32_t siaddr; |
| uint32_t giaddr; |
| uint8_t chaddr[16]; |
| uint8_t sname[64]; |
| uint8_t file[128]; |
| uint8_t options[0]; |
| } __attribute__ ((packed)); |
| |
| struct dhcp_message_iter { |
| const struct dhcp_message *message; |
| size_t message_len; |
| const uint8_t *options; |
| uint16_t pos; |
| uint16_t max; |
| bool can_overload : 1; |
| bool overload_sname : 1; |
| bool overload_file : 1; |
| }; |
| |
| const char *_dhcp_message_type_to_string(uint8_t type); |
| const char *_dhcp_option_to_string(uint8_t option); |
| |
| uint16_t _dhcp_checksum(const void *buf, size_t len); |
| uint16_t _dhcp_checksumv(const struct iovec *iov, size_t iov_cnt); |
| |
| typedef void (*dhcp_transport_rx_cb_t)(const void *, size_t, void *); |
| |
| struct dhcp_transport { |
| int (*open)(struct dhcp_transport *s, uint32_t ifindex, |
| const char *ifname, uint32_t port); |
| int (*send)(struct dhcp_transport *transport, |
| const struct sockaddr_in *dest, |
| const void *data, size_t len); |
| int (*broadcast)(struct dhcp_transport *transport, |
| uint32_t saddr, uint16_t sport, |
| uint32_t daddr, uint16_t dport, |
| const void *data, size_t len); |
| void (*close)(struct dhcp_transport *transport); |
| uint32_t ifindex; |
| dhcp_transport_rx_cb_t rx_cb; |
| void *rx_data; |
| }; |
| |
| struct dhcp_transport *_dhcp_default_transport_new(void); |
| void _dhcp_transport_free(struct dhcp_transport *transport); |
| void _dhcp_transport_set_rx_callback(struct dhcp_transport *transport, |
| dhcp_transport_rx_cb_t rx_cb, |
| void *userdata); |
| |
| bool _dhcp_message_iter_init(struct dhcp_message_iter *iter, |
| const struct dhcp_message *message, size_t len); |
| bool _dhcp_message_iter_next(struct dhcp_message_iter *iter, uint8_t *type, |
| uint8_t *len, const void **data); |
| |
| int _dhcp_option_append(uint8_t **buf, size_t *buflen, uint8_t code, |
| size_t optlen, const void *optval); |
| |
| bool _dhcp_client_set_transport(struct l_dhcp_client *client, |
| struct dhcp_transport *transport); |
| void _dhcp_client_override_xid(struct l_dhcp_client *client, uint32_t xid); |
| |
| struct l_dhcp_lease { |
| uint32_t address; |
| uint32_t server_address; |
| uint32_t subnet_mask; |
| uint32_t broadcast; |
| uint32_t lifetime; |
| uint32_t t1; |
| uint32_t t2; |
| uint32_t router; |
| uint32_t *dns; |
| }; |
| |
| struct l_dhcp_lease *_dhcp_lease_new(void); |
| void _dhcp_lease_free(struct l_dhcp_lease *lease); |
| struct l_dhcp_lease *_dhcp_lease_parse_options(struct dhcp_message_iter *iter); |