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Diffstat (limited to 'src/lookups/spf.c')
| -rw-r--r-- | src/lookups/spf.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/lookups/spf.c b/src/lookups/spf.c new file mode 100644 index 0000000..179b3a6 --- /dev/null +++ b/src/lookups/spf.c @@ -0,0 +1,159 @@ +/************************************************* +* 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 */ |