1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* client.h: dhcp client
*/
#ifndef included_dhcp_client_h
#define included_dhcp_client_h
#include <vnet/ip/ip.h>
#include <vnet/dhcp/dhcp4_packet.h>
#define foreach_dhcp_client_state \
_(DHCP_DISCOVER) \
_(DHCP_REQUEST) \
_(DHCP_BOUND)
typedef enum
{
#define _(a) a,
foreach_dhcp_client_state
#undef _
} dhcp_client_state_t;
struct dhcp_client_t_;
/**
* Callback function for DHCP complete events
*/
typedef void (*dhcp_event_cb_t) (u32 client_index,
const struct dhcp_client_t_ * client);
typedef struct dhcp_client_t_
{
dhcp_client_state_t state;
/* the interface in question */
u32 sw_if_index;
/* State machine retry counter */
u32 retry_count;
/* Send next pkt at this time */
f64 next_transmit;
f64 lease_expires;
/* DHCP transaction ID, a random number */
u32 transaction_id;
/* leased address, other learned info DHCP */
ip4_address_t leased_address; /* from your_ip_address field */
ip4_address_t dhcp_server;
u32 subnet_mask_width; /* option 1 */
ip4_address_t router_address; /* option 3 */
ip4_address_t *domain_server_address; /* option 6 */
u32 lease_renewal_interval; /* option 51 */
u32 lease_lifetime; /* option 59 */
/* Requested data (option 55) */
u8 *option_55_data;
/* hostname and software client identifiers */
u8 *hostname;
u8 *client_identifier; /* software version, e.g. vpe 1.0 */
/* Information used for event callback */
u32 client_index;
u32 pid;
/* Set the broadcast Flag in the Discover/Request messages */
u8 set_broadcast_flag;
/* Interface MAC address, so we can do an rx-packet-for-us check */
u8 client_hardware_address[6];
u8 client_detect_feature_enabled;
/* the unicast adjacency for the DHCP server */
adj_index_t ai_ucast;
/* the broadcast adjacency on the link */
adj_index_t ai_bcast;
dhcp_event_cb_t event_callback;
} dhcp_client_t;
typedef struct
{
/* DHCP client pool */
dhcp_client_t *clients;
uword *client_by_sw_if_index;
u32 seed;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
} dhcp_client_main_t;
typedef struct
{
int is_add;
u32 sw_if_index;
u8 set_broadcast_flag;
/* vectors, consumed by dhcp client code */
u8 *hostname;
u8 *client_identifier;
/* Bytes containing requested option numbers */
u8 *option_55_data;
/* Information used for event callback */
u32 client_index;
u32 pid;
dhcp_event_cb_t event_callback;
} dhcp_client_add_del_args_t;
extern dhcp_client_main_t dhcp_client_main;
#define EVENT_DHCP_CLIENT_WAKEUP 1
int dhcp_client_for_us (u32 bi0,
vlib_buffer_t * b0,
ip4_header_t * ip0,
udp_header_t * u0, dhcp_header_t * dh0);
/**
* Add/Delete DHCP clients
*/
extern int dhcp_client_config (u32 is_add,
u32 client_index,
vlib_main_t * vm,
u32 sw_if_index,
u8 * hostname,
u8 * client_id,
dhcp_event_cb_t event_callback,
u8 set_broadcast_flag, u32 pid);
/**
* callback function for clients walking the DHCP client configurations
*
* @param client The client being visitsed
* @param data The data passed during the call to 'walk'
* @return !0 to continue walking 0 to stop.
*/
typedef int (*dhcp_client_walk_cb_t) (const dhcp_client_t * client,
void *data);
/**
* Walk (visit each) DHCP client configuration
*
* @param cb The callback function invoked as each client is visited
* @param ctx Context data passed back to the client in the invocation of
* the callback.
*/
extern void dhcp_client_walk (dhcp_client_walk_cb_t cb, void *ctx);
#endif /* included_dhcp_client_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
