| 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 EXPERIMENTAL_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 | #ifndef HAVE_NS_TYPE |
| 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 | static void * |
| 36 | spf_open(uschar *filename, uschar **errmsg) |
| 37 | { |
| 38 | SPF_server_t *spf_server = NULL; |
| 39 | spf_server = SPF_server_new(SPF_DNS_CACHE, 0); |
| 40 | if (spf_server == NULL) { |
| 41 | *errmsg = US"SPF_server_new() failed"; |
| 42 | return NULL; |
| 43 | } |
| 44 | return (void *) spf_server; |
| 45 | } |
| 46 | |
| 47 | static void |
| 48 | spf_close(void *handle) |
| 49 | { |
| 50 | SPF_server_t *spf_server = handle; |
| 51 | if (spf_server) SPF_server_free(spf_server); |
| 52 | } |
| 53 | |
| 54 | static int |
| 55 | spf_find(void *handle, uschar *filename, const uschar *keystring, int key_len, |
| 56 | uschar **result, uschar **errmsg, uint *do_cache) |
| 57 | { |
| 58 | SPF_server_t *spf_server = handle; |
| 59 | SPF_request_t *spf_request = NULL; |
| 60 | SPF_response_t *spf_response = NULL; |
| 61 | |
| 62 | spf_request = SPF_request_new(spf_server); |
| 63 | if (spf_request == NULL) { |
| 64 | *errmsg = US"SPF_request_new() failed"; |
| 65 | return FAIL; |
| 66 | } |
| 67 | |
| 68 | if (SPF_request_set_ipv4_str(spf_request, CS filename)) { |
| 69 | *errmsg = string_sprintf("invalid IP address '%s'", filename); |
| 70 | return FAIL; |
| 71 | } |
| 72 | if (SPF_request_set_env_from(spf_request, CS keystring)) { |
| 73 | *errmsg = string_sprintf("invalid envelope from address '%s'", keystring); |
| 74 | return FAIL; |
| 75 | } |
| 76 | |
| 77 | SPF_request_query_mailfrom(spf_request, &spf_response); |
| 78 | *result = string_copy(US SPF_strresult(SPF_response_result(spf_response))); |
| 79 | SPF_response_free(spf_response); |
| 80 | SPF_request_free(spf_request); |
| 81 | return OK; |
| 82 | } |
| 83 | |
| 84 | |
| 85 | /************************************************* |
| 86 | * Version reporting entry point * |
| 87 | *************************************************/ |
| 88 | |
| 89 | /* See local README for interface description. */ |
| 90 | |
| 91 | #include "../version.h" |
| 92 | |
| 93 | void |
| 94 | spf_version_report(FILE *f) |
| 95 | { |
| 96 | #ifdef DYNLOOKUP |
| 97 | fprintf(f, "Library version: SPF: Exim version %s\n", EXIM_VERSION_STR); |
| 98 | #endif |
| 99 | } |
| 100 | |
| 101 | |
| 102 | static lookup_info _lookup_info = { |
| 103 | US"spf", /* lookup name */ |
| 104 | 0, /* not absfile, not query style */ |
| 105 | spf_open, /* open function */ |
| 106 | NULL, /* no check function */ |
| 107 | spf_find, /* find function */ |
| 108 | spf_close, /* close function */ |
| 109 | NULL, /* no tidy function */ |
| 110 | NULL, /* no quoting function */ |
| 111 | spf_version_report /* version reporting */ |
| 112 | }; |
| 113 | |
| 114 | #ifdef DYNLOOKUP |
| 115 | #define spf_lookup_module_info _lookup_module_info |
| 116 | #endif |
| 117 | |
| 118 | static lookup_info *_lookup_list[] = { &_lookup_info }; |
| 119 | lookup_module_info spf_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 }; |
| 120 | |
| 121 | #endif /* EXPERIMENTAL_SPF */ |