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
|
/*
* Copyright (c) 2013-2014 RIPE NCC <atlas@ripe.net>
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#define LINEL (INET6_ADDRSTRLEN * 2)
#include "libbb.h"
#include "resolv.h"
#include "eperd.h"
#include "readresolv.h"
#include <math.h>
static void nameserver_ip_add (char **nsentry, char *ip_as_string)
{
*nsentry= strdup(ip_as_string);
}
static int resolv_conf_parse_line (char **nsentry, char *line)
{
#define NEXT_TOKEN strtok_r(NULL, delims, &strtok_state)
char *strtok_state;
static const char *const delims = " \t";
char *const first_token = strtok_r(line, delims, &strtok_state);
if (!first_token) return 0;
if (!strcmp(first_token, "nameserver")) {
char *const nameserver = NEXT_TOKEN;
if (nameserver) {
if(nameserver[(strlen(nameserver) - 1)] == '\n')
nameserver[(strlen(nameserver) - 1)] = '\0';
nameserver_ip_add(nsentry, nameserver);
//printf("AA added nameserver %s\n", nsentry);
return 1;
}
}
return 0;
}
void get_local_resolvers(char *nslist[MAXNS], int *resolv_max, char *ifname)
{
#ifndef RESOLV_CONF
#define RESOLV_CONF "/etc/resolv.conf"
#endif
char buf[LINEL];
char filename[80];
char *buf_start;
int i = 0;
struct stat sb;
FILE *R;
if (ifname)
{
snprintf(filename, sizeof(filename), "%s.%s",
RESOLV_CONF, ifname);
/* Check if it exists */
if (stat(filename, &sb) == -1)
{
crondlog(LVL8 "get_local_resolvers: stat of %s failed: %s",
filename, strerror(errno));
/* Fall back to resolv.conf */
strlcpy(filename, RESOLV_CONF, sizeof(filename));
}
}
else
{
/* Just use resolv.conf */
strlcpy(filename, RESOLV_CONF, sizeof(filename));
}
crondlog(LVL8 "get_local_resolvers: using %s", filename);
R = fopen (filename, "r");
if (R != NULL) {
while ( (fgets (buf, LINEL, R)) && (i < MAXNS)) {
buf_start = buf;
if(resolv_conf_parse_line(&nslist[i], buf) ) {
crondlog(LVL5 "parsed file %s , line %s i=%d", filename, buf_start, i);
i++;
}
else
crondlog(LVL5 "ERROR failed to parse from %s i=%d, line %s", filename, i, buf_start);
}
fclose (R);
}
*resolv_max = i;
}
|
