| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* |
| 6 | * Exim - SPF lookup module using libspf2 |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * Copyright (c) 2005 Chris Webb, Arachsys Internet Services Ltd |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License |
| 13 | * as published by the Free Software Foundation; either version 2 |
| 14 | * of the License, or (at your option) any later version. |
| 15 | * |
| 16 | * Copyright (c) The Exim Maintainers 2016 |
| 17 | */ |
| 18 | |
| 19 | #include "../exim.h" |
| 20 | |
| 21 | #ifndef SUPPORT_SPF |
| 22 | static void dummy(int x); |
| 23 | static void dummy2(int x) { dummy(x-1); } |
| 24 | static void dummy(int x) { dummy2(x-1); } |
| 25 | #else |
| 26 | |
| 27 | #include "lf_functions.h" |
| 28 | #if !defined(HAVE_NS_TYPE) && defined(NS_INADDRSZ) |
| 29 | # define HAVE_NS_TYPE |
| 30 | #endif |
| 31 | #include <spf2/spf.h> |
| 32 | #include <spf2/spf_dns_resolv.h> |
| 33 | #include <spf2/spf_dns_cache.h> |
| 34 | |
| 35 | extern SPF_dns_server_t * SPF_dns_exim_new(int); |
| 36 | |
| 37 | |
| 38 | static void * |
| 39 | spf_open(uschar *filename, uschar **errmsg) |
| 40 | { |
| 41 | SPF_dns_server_t * dc; |
| 42 | SPF_server_t *spf_server = NULL; |
| 43 | int debug = 0; |
| 44 | |
| 45 | DEBUG(D_lookup) debug = 1; |
| 46 | |
| 47 | if ((dc = SPF_dns_exim_new(debug))) |
| 48 | if ((dc = SPF_dns_cache_new(dc, NULL, debug, 8))) |
| 49 | spf_server = SPF_server_new_dns(dc, debug); |
| 50 | |
| 51 | if (!spf_server) |
| 52 | { |
| 53 | *errmsg = US"SPF_dns_exim_nnew() failed"; |
| 54 | return NULL; |
| 55 | } |
| 56 | return (void *) spf_server; |
| 57 | } |
| 58 | |
| 59 | |
| 60 | static void |
| 61 | spf_close(void *handle) |
| 62 | { |
| 63 | SPF_server_t *spf_server = handle; |
| 64 | if (spf_server) SPF_server_free(spf_server); |
| 65 | } |
| 66 | |
| 67 | static int |
| 68 | spf_find(void *handle, uschar *filename, const uschar *keystring, int key_len, |
| 69 | uschar **result, uschar **errmsg, uint *do_cache) |
| 70 | { |
| 71 | SPF_server_t *spf_server = handle; |
| 72 | SPF_request_t *spf_request; |
| 73 | SPF_response_t *spf_response = NULL; |
| 74 | |
| 75 | if (!(spf_request = SPF_request_new(spf_server))) |
| 76 | { |
| 77 | *errmsg = US"SPF_request_new() failed"; |
| 78 | return FAIL; |
| 79 | } |
| 80 | |
| 81 | #if HAVE_IPV6 |
| 82 | switch (string_is_ip_address(filename, NULL)) |
| 83 | #else |
| 84 | switch (4) |
| 85 | #endif |
| 86 | { |
| 87 | case 4: |
| 88 | if (!SPF_request_set_ipv4_str(spf_request, CS filename)) |
| 89 | break; |
| 90 | *errmsg = string_sprintf("invalid IPv4 address '%s'", filename); |
| 91 | return FAIL; |
| 92 | #if HAVE_IPV6 |
| 93 | |
| 94 | case 6: |
| 95 | if (!SPF_request_set_ipv6_str(spf_request, CS filename)) |
| 96 | break; |
| 97 | *errmsg = string_sprintf("invalid IPv6 address '%s'", filename); |
| 98 | return FAIL; |
| 99 | |
| 100 | default: |
| 101 | *errmsg = string_sprintf("invalid IP address '%s'", filename); |
| 102 | return FAIL; |
| 103 | #endif |
| 104 | } |
| 105 | |
| 106 | if (SPF_request_set_env_from(spf_request, CS keystring)) |
| 107 | { |
| 108 | *errmsg = string_sprintf("invalid envelope from address '%s'", keystring); |
| 109 | return FAIL; |
| 110 | } |
| 111 | |
| 112 | SPF_request_query_mailfrom(spf_request, &spf_response); |
| 113 | *result = string_copy(US SPF_strresult(SPF_response_result(spf_response))); |
| 114 | SPF_response_free(spf_response); |
| 115 | SPF_request_free(spf_request); |
| 116 | return OK; |
| 117 | } |
| 118 | |
| 119 | |
| 120 | /************************************************* |
| 121 | * Version reporting entry point * |
| 122 | *************************************************/ |
| 123 | |
| 124 | /* See local README for interface description. */ |
| 125 | |
| 126 | #include "../version.h" |
| 127 | |
| 128 | void |
| 129 | spf_version_report(FILE *f) |
| 130 | { |
| 131 | #ifdef DYNLOOKUP |
| 132 | fprintf(f, "Library version: SPF: Exim version %s\n", EXIM_VERSION_STR); |
| 133 | #endif |
| 134 | } |
| 135 | |
| 136 | |
| 137 | static lookup_info _lookup_info = { |
| 138 | US"spf", /* lookup name */ |
| 139 | 0, /* not absfile, not query style */ |
| 140 | spf_open, /* open function */ |
| 141 | NULL, /* no check function */ |
| 142 | spf_find, /* find function */ |
| 143 | spf_close, /* close function */ |
| 144 | NULL, /* no tidy function */ |
| 145 | NULL, /* no quoting function */ |
| 146 | spf_version_report /* version reporting */ |
| 147 | }; |
| 148 | |
| 149 | #ifdef DYNLOOKUP |
| 150 | #define spf_lookup_module_info _lookup_module_info |
| 151 | #endif |
| 152 | |
| 153 | static lookup_info *_lookup_list[] = { &_lookup_info }; |
| 154 | lookup_module_info spf_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 }; |
| 155 | |
| 156 | #endif /* SUPPORT_SPF */ |