299d578f7f
1. DHCP server trasmit 2. Client parses and saves in leases Implements http://www.rfc-editor.org/rfc/rfc3361.txt ``` Frame 134: 348 bytes on wire (2784 bits), 348 bytes captured (2784 bits) on interface 0 Ethernet II, Src: 42:65:85:d6:4e:32 (42:65:85:d6:4e:32), Dst: 1e:04:f8:b8:2f:d4 (1e:04:f8:b8:2f:d4) Internet Protocol Version 4, Src: 192.168.5.1, Dst: 192.168.5.11 User Datagram Protocol, Src Port: 67, Dst Port: 68 Dynamic Host Configuration Protocol (ACK) Message type: Boot Reply (2) Hardware type: Ethernet (0x01) Hardware address length: 6 Hops: 0 Transaction ID: 0x7cc87cb4 Seconds elapsed: 0 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 Your (client) IP address: 192.168.5.11 Next server IP address: 0.0.0.0 Relay agent IP address: 0.0.0.0 Client MAC address: 1e:04:f8:b8:2f:d4 (1e:04:f8:b8:2f:d4) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: DHCP Option: (53) DHCP Message Type (ACK) Length: 1 DHCP: ACK (5) Option: (51) IP Address Lease Time Length: 4 IP Address Lease Time: (3600s) 1 hour Option: (1) Subnet Mask (255.255.255.0) Length: 4 Subnet Mask: 255.255.255.0 Option: (3) Router Length: 4 Router: 192.168.5.1 Option: (6) Domain Name Server Length: 4 Domain Name Server: 192.168.5.1 Option: (42) Network Time Protocol Servers Length: 4 Network Time Protocol Server: 192.168.1.1 Option: (120) SIP Servers <=====here Length: 9 SIP Server Encoding: IPv4 Address (1) SIP Server Address: 192.168.1.1 SIP Server Address: 192.168.5.2 Option: (101) TCode Length: 13 TZ TCode: Europe/Berlin Option: (54) DHCP Server Identifier (192.168.5.1) Length: 4 DHCP Server Identifier: 192.168.5.1 Option: (255) End Option End: 255 ``` ``` cat /run/systemd/netif/state ✔ ⚡ 3148 16:40:51 OPER_STATE=routable CARRIER_STATE=carrier ADDRESS_STATE=routable DNS=192.168.94.2 192.168.5.1 NTP=192.168.5.1 SIP=192.168.1.1 192.168.5.2 ``` aa
68 lines
3.1 KiB
C
68 lines
3.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#ifndef foosddhcpleasehfoo
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#define foosddhcpleasehfoo
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/***
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Copyright © 2013 Intel Corporation. All rights reserved.
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <inttypes.h>
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#include <net/ethernet.h>
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#include <netinet/in.h>
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#include <sys/types.h>
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#include "_sd-common.h"
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_SD_BEGIN_DECLARATIONS;
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typedef struct sd_dhcp_lease sd_dhcp_lease;
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typedef struct sd_dhcp_route sd_dhcp_route;
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sd_dhcp_lease *sd_dhcp_lease_ref(sd_dhcp_lease *lease);
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sd_dhcp_lease *sd_dhcp_lease_unref(sd_dhcp_lease *lease);
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int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime);
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int sd_dhcp_lease_get_t1(sd_dhcp_lease *lease, uint32_t *t1);
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int sd_dhcp_lease_get_t2(sd_dhcp_lease *lease, uint32_t *t2);
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int sd_dhcp_lease_get_broadcast(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, const struct in_addr **addr);
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int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease *lease, struct in_addr *addr);
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int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, const struct in_addr **addr);
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int sd_dhcp_lease_get_ntp(sd_dhcp_lease *lease, const struct in_addr **addr);
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int sd_dhcp_lease_get_sip(sd_dhcp_lease *lease, const struct in_addr **addr);
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int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu);
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int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname);
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int sd_dhcp_lease_get_search_domains(sd_dhcp_lease *lease, char ***domains);
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int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname);
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int sd_dhcp_lease_get_root_path(sd_dhcp_lease *lease, const char **root_path);
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int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, sd_dhcp_route ***routes);
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int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const void **data, size_t *data_len);
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int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const void **client_id, size_t *client_id_len);
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int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **timezone);
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int sd_dhcp_route_get_destination(sd_dhcp_route *route, struct in_addr *destination);
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int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route *route, uint8_t *length);
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int sd_dhcp_route_get_gateway(sd_dhcp_route *route, struct in_addr *gateway);
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int sd_dhcp_route_get_option(sd_dhcp_route *route);
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_SD_DEFINE_POINTER_CLEANUP_FUNC(sd_dhcp_lease, sd_dhcp_lease_unref);
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_SD_END_DECLARATIONS;
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#endif
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