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1 office 1 /**
2 * @file BDHCPClientCore.h
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * @section DESCRIPTION
30 *
31 * DHCP client, excluding system-dependent details.
32 */
33  
34 #ifndef BADVPN_DHCPCLIENT_BDHCPCLIENTCORE_H
35 #define BADVPN_DHCPCLIENT_BDHCPCLIENTCORE_H
36  
37 #include <stdint.h>
38 #include <stddef.h>
39  
40 #include <system/BReactor.h>
41 #include <base/DebugObject.h>
42 #include <random/BRandom2.h>
43 #include <flow/PacketPassInterface.h>
44 #include <flow/PacketRecvInterface.h>
45  
46 #define BDHCPCLIENTCORE_EVENT_UP 1
47 #define BDHCPCLIENTCORE_EVENT_DOWN 2
48  
49 #define BDHCPCLIENTCORE_MAX_DOMAIN_NAME_SERVERS 16
50  
51 typedef void (*BDHCPClientCore_func_getsendermac) (void *user, uint8_t *out_mac);
52 typedef void (*BDHCPClientCore_handler) (void *user, int event);
53  
54 struct BDHCPClientCore_opts {
55 const char *hostname;
56 const char *vendorclassid;
57 const uint8_t *clientid;
58 size_t clientid_len;
59 };
60  
61 typedef struct {
62 PacketPassInterface *send_if;
63 PacketRecvInterface *recv_if;
64 uint8_t client_mac_addr[6];
65 BReactor *reactor;
66 BRandom2 *random2;
67 void *user;
68 BDHCPClientCore_func_getsendermac func_getsendermac;
69 BDHCPClientCore_handler handler;
70 char *hostname;
71 char *vendorclassid;
72 uint8_t *clientid;
73 size_t clientid_len;
74 char *send_buf;
75 char *recv_buf;
76 int sending;
77 BTimer reset_timer;
78 BTimer request_timer;
79 BTimer renew_timer;
80 BTimer renew_request_timer;
81 BTimer lease_timer;
82 int state;
83 int request_count;
84 uint32_t xid;
85 int xid_reuse_counter;
86 struct {
87 uint32_t yiaddr;
88 uint32_t dhcp_server_identifier;
89 } offered;
90 struct {
91 uint32_t ip_address_lease_time;
92 uint32_t subnet_mask;
93 int have_router;
94 uint32_t router;
95 int domain_name_servers_count;
96 uint32_t domain_name_servers[BDHCPCLIENTCORE_MAX_DOMAIN_NAME_SERVERS];
97 uint8_t server_mac[6];
98 } acked;
99 DebugObject d_obj;
100 } BDHCPClientCore;
101  
102 int BDHCPClientCore_Init (BDHCPClientCore *o, PacketPassInterface *send_if, PacketRecvInterface *recv_if,
103 uint8_t *client_mac_addr, struct BDHCPClientCore_opts opts, BReactor *reactor,
104 BRandom2 *random2, void *user,
105 BDHCPClientCore_func_getsendermac func_getsendermac,
106 BDHCPClientCore_handler handler);
107 void BDHCPClientCore_Free (BDHCPClientCore *o);
108 void BDHCPClientCore_GetClientIP (BDHCPClientCore *o, uint32_t *out_ip);
109 void BDHCPClientCore_GetClientMask (BDHCPClientCore *o, uint32_t *out_mask);
110 int BDHCPClientCore_GetRouter (BDHCPClientCore *o, uint32_t *out_router);
111 int BDHCPClientCore_GetDNS (BDHCPClientCore *o, uint32_t *out_dns_servers, size_t max_dns_servers);
112 void BDHCPClientCore_GetServerMAC (BDHCPClientCore *o, uint8_t *out_mac);
113  
114 #endif