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
|
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
/* Exim - SPF lookup module using libspf2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Copyright (c) 2005 Chris Webb, Arachsys Internet Services Ltd
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
Copyright (c) The Exim Maintainers 2020
*/
#include "../exim.h"
#ifndef SUPPORT_SPF
static void dummy(int x);
static void dummy2(int x) { dummy(x-1); }
static void dummy(int x) { dummy2(x-1); }
#else
#include "lf_functions.h"
#if !defined(HAVE_NS_TYPE) && defined(NS_INADDRSZ)
# define HAVE_NS_TYPE
#endif
#include <spf2/spf.h>
#include <spf2/spf_dns_resolv.h>
#include <spf2/spf_dns_cache.h>
extern SPF_dns_server_t * SPF_dns_exim_new(int);
static void *
spf_open(const uschar * filename, uschar ** errmsg)
{
SPF_dns_server_t * dc;
SPF_server_t *spf_server = NULL;
int debug = 0;
DEBUG(D_lookup) debug = 1;
if ((dc = SPF_dns_exim_new(debug)))
if ((dc = SPF_dns_cache_new(dc, NULL, debug, 8)))
spf_server = SPF_server_new_dns(dc, debug);
if (!spf_server)
{
*errmsg = US"SPF_dns_exim_nnew() failed";
return NULL;
}
return (void *) spf_server;
}
static void
spf_close(void *handle)
{
SPF_server_t *spf_server = handle;
if (spf_server) SPF_server_free(spf_server);
}
static int
spf_find(void * handle, const uschar * filename, const uschar * keystring,
int key_len, uschar ** result, uschar ** errmsg, uint * do_cache,
const uschar * opts)
{
SPF_server_t *spf_server = handle;
SPF_request_t *spf_request;
SPF_response_t *spf_response = NULL;
if (!(spf_request = SPF_request_new(spf_server)))
{
*errmsg = US"SPF_request_new() failed";
return FAIL;
}
#if HAVE_IPV6
switch (string_is_ip_address(filename, NULL))
#else
switch (4)
#endif
{
case 4:
if (!SPF_request_set_ipv4_str(spf_request, CS filename))
break;
*errmsg = string_sprintf("invalid IPv4 address '%s'", filename);
return FAIL;
#if HAVE_IPV6
case 6:
if (!SPF_request_set_ipv6_str(spf_request, CS filename))
break;
*errmsg = string_sprintf("invalid IPv6 address '%s'", filename);
return FAIL;
default:
*errmsg = string_sprintf("invalid IP address '%s'", filename);
return FAIL;
#endif
}
if (SPF_request_set_env_from(spf_request, CS keystring))
{
*errmsg = string_sprintf("invalid envelope from address '%s'", keystring);
return FAIL;
}
SPF_request_query_mailfrom(spf_request, &spf_response);
*result = string_copy(US SPF_strresult(SPF_response_result(spf_response)));
DEBUG(D_lookup) spf_response_debug(spf_response);
SPF_response_free(spf_response);
SPF_request_free(spf_request);
return OK;
}
/*************************************************
* Version reporting entry point *
*************************************************/
/* See local README for interface description. */
#include "../version.h"
void
spf_version_report(FILE *f)
{
#ifdef DYNLOOKUP
fprintf(f, "Library version: SPF: Exim version %s\n", EXIM_VERSION_STR);
#endif
}
static lookup_info _lookup_info = {
.name = US"spf", /* lookup name */
.type = 0, /* not absfile, not query style */
.open = spf_open, /* open function */
.check = NULL, /* no check function */
.find = spf_find, /* find function */
.close = spf_close, /* close function */
.tidy = NULL, /* no tidy function */
.quote = NULL, /* no quoting function */
.version_report = spf_version_report /* version reporting */
};
#ifdef DYNLOOKUP
#define spf_lookup_module_info _lookup_module_info
#endif
static lookup_info *_lookup_list[] = { &_lookup_info };
lookup_module_info spf_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 };
#endif /* SUPPORT_SPF */
|
