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
|
/* Copyright 2011,2013, NORDUnet A/S. All rights reserved. */
/* See LICENSE for licensing information. */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <stdio.h>
#include <event2/event.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/select.h>
#include <sys/time.h>
#include "radius/client.h"
#include "udp.h"
static struct addrinfo *
_resolve (const char *str)
{
static int first = 1;
static struct addrinfo hints, *result = NULL;
struct addrinfo *rp = NULL;
int r;
if (first)
{
first = 0;
memset (&hints, 0, sizeof (hints));
hints.ai_family = AF_INET; /* AF_UNSPEC */
hints.ai_socktype = SOCK_DGRAM;
r = getaddrinfo (NULL, str, &hints, &result);
if (r)
fprintf (stderr, "getaddrinfo: %s\n", gai_strerror (r));
}
if (result)
{
rp = result;
result = result->ai_next;
}
return rp;
}
void
udp_free_polldata (struct polldata *data)
{
if (data)
{
if (data->timeout)
free (data->timeout);
free (data);
}
}
/* @return if select() returns error or timeout, return select()
else return value from invoked callback function */
ssize_t
udp_poll (struct polldata *data)
{
int r;
long timeout = 0;
fd_set rfds;
ssize_t len;
uint8_t buf[RS_MAX_PACKET_LEN];
FD_ZERO (&rfds);
FD_SET (data->s, &rfds);
if (data->timeout)
timeout = data->timeout->tv_sec; /* Save from destruction (Linux). */
//fprintf (stderr, "calling select with timeout %ld\n", timeout);
r = select (data->s + 1, &rfds, NULL, NULL, data->timeout);
if (data->timeout)
data->timeout->tv_sec = timeout; /* Restore. */
//fprintf (stderr, "select returning %d\n", r);
if (r > 0)
{
len = recv (data->s, buf, sizeof (buf), 0);
if (len > 0)
return data->cb (buf, len);
}
return r;
}
struct polldata *
udp_server (const char *bindto, struct timeval *timeout, data_cb cb)
{
struct addrinfo *res;
int s = -1;
for (res = _resolve (bindto); res; res = _resolve (bindto))
{
s = socket (res->ai_family, res->ai_socktype, res->ai_protocol);
if (s >= 0)
{
if (bind (s, res->ai_addr, res->ai_addrlen) == 0)
break; /* Done. */
else
{
close (s);
s = -1;
}
}
}
if (s >= 0)
{
struct polldata *data = malloc (sizeof (struct polldata));
assert (data);
memset (data, 0, sizeof (struct polldata));
data->s = s;
data->cb = cb;
if (timeout)
{
data->timeout = malloc (sizeof (struct timeval));
assert (data->timeout);
memcpy (data->timeout, timeout, sizeof (struct timeval));
}
return data;
}
return NULL;
}
ssize_t
hd (const uint8_t *buf, ssize_t len)
{
int i;
printf ("# len: %ld\n", len);
for (i = 0; i < len; i++)
{
printf ("%02x%s", buf[i], (i+1) % 8 ? " " : " ");
if ((i + 1) % 16 == 0)
printf ("\n");
}
printf ("\n");
return len;
}
|
