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
|
/* Copyright 2010, 2011 NORDUnet A/S. All rights reserved.
See LICENSE for licensing information. */
#if defined HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/time.h>
#include <event2/event.h>
#include <radsec/radsec.h>
#include <radsec/radsec-impl.h>
#include <radsec/request.h>
#include <radsec/request-impl.h>
#include <radius/client.h>
#include "debug.h"
#include "conn.h"
#include "tcp.h"
#include "udp.h"
/* RFC 5080 2.2.1. Retransmission Behavior. */
#define IRT 2
#define MRC 5
#define MRT 16
#define MRD 30
#define RAND 100 /* Rand factor, milliseconds. */
int
rs_request_create (struct rs_connection *conn, struct rs_request **req_out)
{
struct rs_request *req = rs_malloc (conn->ctx, sizeof(*req));
assert (req_out);
if (!req)
return rs_err_conn_push_fl (conn, RSE_NOMEM, __FILE__, __LINE__, NULL);
memset (req, 0, sizeof(*req));
req->conn = conn;
*req_out = req;
return RSE_OK;
}
void
rs_request_add_reqpkt (struct rs_request *req, struct rs_packet *req_msg)
{
assert (req);
req->req_msg = req_msg;
}
int
rs_request_create_authn (struct rs_connection *conn,
struct rs_request **req_out,
const char *user_name,
const char *user_pw,
const char *secret)
{
struct rs_request *req = NULL;
assert (req_out);
if (rs_request_create (conn, &req))
return -1;
if (rs_packet_create_authn_request (conn, &req->req_msg, user_name, user_pw, secret))
return -1;
if (req_out)
*req_out = req;
return RSE_OK;
}
void
rs_request_destroy (struct rs_request *request)
{
assert (request);
assert (request->conn);
assert (request->conn->ctx);
if (request->req_msg)
rs_packet_destroy (request->req_msg);
rs_free (request->conn->ctx, request);
}
static void
_rand_rt (struct timeval *res, uint32_t rtprev, uint32_t factor)
{
uint32_t ms = rtprev * (nr_rand () % factor);
res->tv_sec = rtprev + ms / 1000;
res->tv_usec = (ms % 1000) * 1000;
}
int
rs_request_send (struct rs_request *request, struct rs_packet **resp_msg)
{
int r = 0;
struct rs_connection *conn = NULL;
int count = 0;
struct timeval rt = {0,0};
struct timeval end = {0,0};
struct timeval now = {0,0};
struct timeval tmp_tv = {0,0};
const struct timeval mrt_tv = {MRT,0};
if (!request || !request->conn || !request->req_msg || !resp_msg)
return rs_err_conn_push_fl (conn, RSE_INVAL, __FILE__, __LINE__, NULL);
conn = request->conn;
assert (!conn_user_dispatch_p (conn)); /* This function is high level. */
gettimeofday (&end, NULL);
end.tv_sec += MRD;
_rand_rt (&rt, IRT, RAND);
while (1)
{
rs_conn_set_timeout (conn, &rt);
r = rs_packet_send (request->req_msg, NULL);
if (r == RSE_OK)
{
r = rs_conn_receive_packet (request->conn,
request->req_msg,
resp_msg);
if (r == RSE_OK)
break; /* Success. */
if (r != RSE_TIMEOUT_CONN && r != RSE_TIMEOUT_IO)
break; /* Error. */
}
else if (r != RSE_TIMEOUT_CONN && r != RSE_TIMEOUT_IO)
break; /* Error. */
gettimeofday (&now, NULL);
if (++count > MRC || timercmp (&now, &end, >))
{
r = RSE_TIMEOUT;
break; /* Timeout. */
}
/* rt = 2 * rt + rand_rt (rt, RAND); */
timeradd (&rt, &rt, &rt);
_rand_rt (&tmp_tv, IRT, RAND);
timeradd (&rt, &tmp_tv, &rt);
if (timercmp (&rt, &mrt_tv, >))
_rand_rt (&rt, MRT, RAND);
}
timerclear (&rt);
rs_conn_set_timeout (conn, &rt);
rs_debug (("%s: returning %d\n", __func__, r));
return r;
}
struct rs_packet *
rs_request_get_reqmsg (const struct rs_request *request)
{
assert (request);
return request->req_msg;
}
|
