static void response_print_errors(const char *context, SPF_response_t *spf_response, SPF_errcode_t err) { SPF_error_t *spf_error;; int i; syslog(LOG_CRIT,"StartError\n"); if (context != NULL) syslog(LOG_CRIT,"Context: %s\n", context); if (err != SPF_E_SUCCESS) syslog(LOG_CRIT,"ErrorCode: (%d) %s\n", err, SPF_strerror(err)); if (spf_response != NULL) { for (i = 0; i < SPF_response_messages(spf_response); i++) { spf_error = SPF_response_message(spf_response, i); syslog(LOG_CRIT,"%s: %s%s\n", SPF_error_errorp(spf_error) ? "Error" : "Warning", // SPF_error_code(spf_error), // SPF_strerror(SPF_error_code(spf_error)), ((SPF_error_errorp(spf_error) && (!err)) ? "[UNRETURNED] " : ""), SPF_error_message(spf_error) ); } } else { syslog(LOG_CRIT,"libspf2 gave a NULL spf_response\n"); } syslog(LOG_CRIT,"EndError\n"); }
static void response_print(const char *context, SPF_response_t *spf_response) { syslog(LOG_DEBUG,"--vv--\n"); syslog(LOG_DEBUG,"Context: %s\n", context); if (spf_response == NULL) { syslog(LOG_DEBUG, "NULL RESPONSE!\n"); } else { syslog(LOG_DEBUG, "Response result: %s\n", SPF_strresult(SPF_response_result(spf_response))); syslog(LOG_DEBUG, "Response reason: %s\n", SPF_strreason(SPF_response_reason(spf_response))); syslog(LOG_DEBUG, "Response err: %s\n", SPF_strerror(SPF_response_errcode(spf_response))); response_print_errors(NULL, spf_response, SPF_response_errcode(spf_response)); } syslog(LOG_DEBUG,"--^^--\n"); }
CAMLprim value caml_spf_request_set_inet_addr(value req_val, value addr) { CAMLparam2(req_val, addr); SPF_request_t *req = (SPF_request_t *)req_val; struct sockaddr_storage ss; socklen_t ss_len; SPF_errcode_t e = SPF_E_SUCCESS; spf_get_sockaddr(addr, &ss, &ss_len); switch (ss.ss_family) { case AF_INET: e = SPF_request_set_ipv4(req, ((struct sockaddr_in *)&ss)->sin_addr); break; case AF_INET6: e = SPF_request_set_ipv6(req, ((struct sockaddr_in6 *)&ss)->sin6_addr); break; } if (e != SPF_E_SUCCESS) spf_error(SPF_strerror(e)); CAMLreturn(Val_unit); }
int main() { int spf; char *me, *remote, *helo, *sender, *spf_env; const char *header; SPF_server_t *spf_server; SPF_request_t *spf_request; SPF_response_t *spf_response; /** * env variables **/ if (getenv("RELAYCLIENT") || /* known user */ !(spf_env = getenv("SPF"))) return 0; /* plugin disabled */ spf = atoi(spf_env); if (spf < 1 || spf > 6) { if (spf > 6) fprintf(stderr, "spf: ERROR: invalid value (%d) of SPF variable\n", spf); return 0; } remote = getenv("TCPREMOTEIP"); me = getenv("TCPLOCALHOST"); if (!me) me = getenv("TCPLOCALIP"); if (!remote || !me) { /* should never happen */ fprintf(stderr, "spf: ERROR: can't get tcpserver variables\n"); if(!remote) fprintf(stderr, "spf: can't read TCPREMOTEIP\n"); else fprintf(stderr, "spf: can't read TCPLOCALHOST nor TCPLOCALIP\n"); return 0; } sender = getenv("SMTPMAILFROM"); if (!sender) { /* should never happen */ fprintf(stderr, "spf: ERROR: can't get envelope sender address\n"); fprintf(stderr, "spf: can't read SMTPMAILFROM\n"); return 0; } if (!*sender) return 0; /* null sender mail */ helo = getenv("SMTPHELOHOST"); /** * SPF **/ spf_server = SPF_server_new(SPF_DNS_CACHE, 0); if (!spf_server) { fprintf(stderr, "spf: ERROR: can't initialize libspf2\n"); return 0; } spf_request = SPF_request_new(spf_server); if (!spf_request) { fprintf(stderr, "spf: ERROR: can't initialize libspf2\n"); return 0; } if (SPF_request_set_ipv4_str(spf_request, remote)) { fprintf(stderr, "spf: can't parse TCPREMOTEIP\n"); return 0; } SPF_server_set_rec_dom(spf_server, me); if (helo) SPF_request_set_helo_dom(spf_request, helo); SPF_request_set_env_from(spf_request, sender); /* Perform actual lookup */ SPF_request_query_mailfrom(spf_request, &spf_response); /* check whether mail needn`t to be blocked */ switch (SPF_response_result(spf_response)) { case SPF_RESULT_PASS: break; case SPF_RESULT_FAIL: if (spf > 0) { block(spf_response); return 0; } break; case SPF_RESULT_SOFTFAIL: if (spf > 1) { block(spf_response); return 0; } break; case SPF_RESULT_NEUTRAL: if (spf > 2) { block(spf_response); return 0; } break; case SPF_RESULT_NONE: if (spf > 3) { block(spf_response); return 0; } break; case SPF_RESULT_TEMPERROR: case SPF_RESULT_PERMERROR: if (spf > 4) { block(spf_response); return 0; } break; #if 0 case SPF_RESULT_UNKNOWN: if (spf > 5) { block(spf_response); return 0; } break; case SPF_RESULT_UNMECH: break; #else // FIXME: UNKNOWN and UNMECH above map how? // INVALID should not ever occur, it indicates a bug. case SPF_RESULT_INVALID: if (spf > 5) { block(spf_response); return 0; } break; #endif } /* add header */ header = SPF_response_get_received_spf(spf_response); if (header) printf("H%s\n", header); else { fprintf(stderr, "spf: libspf2 library failed to produce Received-SPF header\n", SPF_strerror(SPF_response_errcode(spf_response))); /* Example taken from libspf2: */ /* fprintf ( stderr, "spf: diag: result = %s (%d)\n", SPF_strresult(SPF_response_result(spf_response)), SPF_response_result(spf_response)); fprintf ( stderr, "spf: diag: err = %s (%d)\n", SPF_strerror(SPF_response_errcode(spf_response)), SPF_response_errcode(spf_response)); for (i = 0; i < SPF_response_messages(spf_response); i++) { SPF_error_t *err = SPF_response_message(spf_response, i); fprintf ( stderr, "spf: diag: %s_msg = (%d) %s\n", (SPF_error_errorp(err) ? "warn" : "err"), SPF_error_code(err), SPF_error_message(err)); } */ } SPF_response_free(spf_response); SPF_request_free(spf_request); SPF_server_free(spf_server); return 0; }
SPF_errcode_t SPF_record_interpret(SPF_record_t *spf_record, SPF_request_t *spf_request, SPF_response_t *spf_response, int depth) { SPF_server_t *spf_server; /* Temporaries */ int i, j; int m; /* Mechanism iterator */ SPF_mech_t *mech; SPF_data_t *data; SPF_data_t *data_end; /* XXX Replace with size_t data_len */ /* Where to insert the local policy (whitelist) */ SPF_mech_t *local_policy; /* Not the local policy */ int found_all; /* A crappy temporary. */ char *buf = NULL; size_t buf_len = 0; ns_type fetch_ns_type; const char *lookup; SPF_dns_rr_t *rr_a; SPF_dns_rr_t *rr_aaaa; SPF_dns_rr_t *rr_ptr; SPF_dns_rr_t *rr_mx; SPF_errcode_t err; SPF_dns_server_t*resolver; /* An SPF record for subrequests - replaces c_results */ SPF_record_t *spf_record_subr; SPF_response_t *save_spf_response; SPF_response_t *spf_response_subr; const char *save_cur_dom; struct in_addr addr4; struct in6_addr addr6; int max_ptr; int max_mx; int max_exceeded; char ip4_buf[ INET_ADDRSTRLEN ]; char ip6_buf[ INET6_ADDRSTRLEN ]; /* * make sure we were passed valid data to work with */ SPF_ASSERT_NOTNULL(spf_record); SPF_ASSERT_NOTNULL(spf_request); SPF_ASSERT_NOTNULL(spf_response); spf_server = spf_record->spf_server; SPF_ASSERT_NOTNULL(spf_server); SPF_ASSERT_NOTNULL(spf_response->spf_record_exp); if (depth > 20) return DONE_PERMERR(SPF_E_RECURSIVE); if ( spf_request->client_ver != AF_INET && spf_request->client_ver != AF_INET6 ) return DONE_PERMERR(SPF_E_NOT_CONFIG); if (spf_request->cur_dom == NULL) return DONE_PERMERR(SPF_E_NOT_CONFIG); /* * localhost always gets a free ride */ #if 0 /* This should have been done already before we got here. */ if ( SPF_request_is_loopback( spf_request ) ) return DONE(SPF_RESULT_PASS,SPF_REASON_LOCALHOST,SPF_E_SUCCESS); #endif /* * Do some start up stuff if we haven't recursed yet */ local_policy = NULL; if ( spf_request->use_local_policy ) { /* * find the location for the whitelist execution * * Philip Gladstone says: * * I think that the localpolicy should only be inserted if the * final mechanism is '-all', and it should be inserted after * the last mechanism which is not '-'. * * Thus for the case of 'v=spf1 +a +mx -all', this would be * interpreted as 'v=spf1 +a +mx +localpolicy -all'. Whereas * 'v=spf1 -all' would remain the same (no non-'-' * mechanism). 'v=spf1 +a +mx -exists:%stuff -all' would * become 'v=spf1 +a +mx +localpolicy -exists:%stuff -all'. */ if ( spf_server->local_policy ) { mech = spf_record->mech_first; found_all = FALSE; for(m = 0; m < spf_record->num_mech; m++) { if ( mech->mech_type == MECH_ALL && (mech->prefix_type == PREFIX_FAIL || mech->prefix_type == PREFIX_UNKNOWN || mech->prefix_type == PREFIX_SOFTFAIL ) ) found_all = TRUE; if ( mech->prefix_type != PREFIX_FAIL && mech->prefix_type != PREFIX_SOFTFAIL ) local_policy = mech; mech = SPF_mech_next( mech ); } if ( !found_all ) local_policy = NULL; } } /* * evaluate the mechanisms */ #define SPF_ADD_DNS_MECH() do { spf_response->num_dns_mech++; } while(0) #define SPF_MAYBE_SKIP_CIDR() \ do { \ if ( data < data_end && data->dc.parm_type == PARM_CIDR ) \ data = SPF_data_next( data ); \ } while(0) #define SPF_GET_LOOKUP_DATA() \ do { \ if ( data == data_end ) \ lookup = spf_request->cur_dom; \ else { \ err = SPF_record_expand_data( spf_server, \ spf_request, spf_response, \ data, ((char *)data_end - (char *)data), \ &buf, &buf_len ); \ if (err == SPF_E_NO_MEMORY) { \ SPF_FREE_LOOKUP_DATA(); \ return DONE_TEMPERR(err); \ } \ if (err) { \ SPF_FREE_LOOKUP_DATA(); \ return DONE_PERMERR(err); \ } \ lookup = buf; \ } \ } while(0) #define SPF_FREE_LOOKUP_DATA() \ do { if (buf != NULL) { free(buf); buf = NULL; } } while(0) resolver = spf_server->resolver; mech = spf_record->mech_first; for (m = 0; m < spf_record->num_mech; m++) { /* This is as good a place as any. */ /* XXX Rip this out and put it into a macro which can go into inner loops. */ if (spf_response->num_dns_mech > spf_server->max_dns_mech) { SPF_FREE_LOOKUP_DATA(); return DONE(SPF_RESULT_PERMERROR, SPF_REASON_NONE, SPF_E_BIG_DNS); } data = SPF_mech_data(mech); data_end = SPF_mech_end_data(mech); switch (mech->mech_type) { case MECH_A: SPF_ADD_DNS_MECH(); SPF_MAYBE_SKIP_CIDR(); SPF_GET_LOOKUP_DATA(); if (spf_request->client_ver == AF_INET) fetch_ns_type = ns_t_a; else fetch_ns_type = ns_t_aaaa; rr_a = SPF_dns_lookup(resolver, lookup, fetch_ns_type, TRUE); if (spf_server->debug) SPF_debugf("found %d A records for %s (herrno: %d)", rr_a->num_rr, lookup, rr_a->herrno); if (rr_a->herrno == TRY_AGAIN) { SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR(SPF_E_DNS_ERROR); /* REASON_MECH */ } for (i = 0; i < rr_a->num_rr; i++) { /* XXX Should this be hoisted? */ if (rr_a->rr_type != fetch_ns_type) continue; if (spf_request->client_ver == AF_INET) { if (SPF_i_match_ip4(spf_server, spf_request, mech, rr_a->rr[i]->a)) { SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_MECH(mech->prefix_type); } } else { if (SPF_i_match_ip6(spf_server, spf_request, mech, rr_a->rr[i]->aaaa)) { SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_MECH(mech->prefix_type); } } } SPF_dns_rr_free(rr_a); break; case MECH_MX: SPF_ADD_DNS_MECH(); SPF_MAYBE_SKIP_CIDR(); SPF_GET_LOOKUP_DATA(); rr_mx = SPF_dns_lookup(resolver, lookup, ns_t_mx, TRUE); if (spf_server->debug) SPF_debugf("found %d MX records for %s (herrno: %d)", rr_mx->num_rr, lookup, rr_mx->herrno); if (rr_mx->herrno == TRY_AGAIN) { SPF_dns_rr_free(rr_mx); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR(SPF_E_DNS_ERROR); } /* The maximum number of MX records we will inspect. */ max_mx = rr_mx->num_rr; max_exceeded = 0; if (max_mx > spf_server->max_dns_mx) { max_exceeded = 1; max_mx = SPF_server_get_max_dns_mx(spf_server); } for (j = 0; j < max_mx; j++) { /* XXX Should this be hoisted? */ if (rr_mx->rr_type != ns_t_mx) continue; if (spf_request->client_ver == AF_INET) fetch_ns_type = ns_t_a; else fetch_ns_type = ns_t_aaaa; rr_a = SPF_dns_lookup(resolver, rr_mx->rr[j]->mx, fetch_ns_type, TRUE ); if (spf_server->debug) SPF_debugf("%d: found %d A records for %s (herrno: %d)", j, rr_a->num_rr, rr_mx->rr[j]->mx, rr_a->herrno); if (rr_a->herrno == TRY_AGAIN) { SPF_dns_rr_free(rr_mx); SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR(SPF_E_DNS_ERROR); } for (i = 0; i < rr_a->num_rr; i++) { /* XXX Should this be hoisted? */ if (rr_a->rr_type != fetch_ns_type) continue; if (spf_request->client_ver == AF_INET) { if (SPF_i_match_ip4(spf_server, spf_request, mech, rr_a->rr[i]->a)) { SPF_dns_rr_free(rr_mx); SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE(mech->prefix_type, SPF_REASON_MECH, SPF_E_SUCCESS); } } else { if (SPF_i_match_ip6(spf_server, spf_request, mech, rr_a->rr[i]->aaaa)) { SPF_dns_rr_free(rr_mx); SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE(mech->prefix_type, SPF_REASON_MECH, SPF_E_SUCCESS); } } } SPF_dns_rr_free(rr_a); } SPF_dns_rr_free( rr_mx ); if (max_exceeded) { SPF_FREE_LOOKUP_DATA(); return DONE(SPF_RESULT_PERMERROR, SPF_REASON_NONE, SPF_E_BIG_DNS); } break; case MECH_PTR: SPF_ADD_DNS_MECH(); SPF_GET_LOOKUP_DATA(); if (spf_request->client_ver == AF_INET) { rr_ptr = SPF_dns_rlookup(resolver, spf_request->ipv4, ns_t_ptr, TRUE); if (spf_server->debug) { INET_NTOP(AF_INET, &spf_request->ipv4.s_addr, ip4_buf, sizeof(ip4_buf)); SPF_debugf("got %d PTR records for %s (herrno: %d)", rr_ptr->num_rr, ip4_buf, rr_ptr->herrno); } if (rr_ptr->herrno == TRY_AGAIN) { SPF_dns_rr_free(rr_ptr); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR(SPF_E_DNS_ERROR); } /* The maximum number of PTR records we will inspect. */ max_ptr = rr_ptr->num_rr; max_exceeded = 0; if (max_ptr > spf_server->max_dns_ptr) { max_exceeded = 1; max_ptr = SPF_server_get_max_dns_ptr(spf_server); } for (i = 0; i < max_ptr; i++) { /* XXX MX has a 'continue' case here which should be hoisted. */ rr_a = SPF_dns_lookup(resolver, rr_ptr->rr[i]->ptr, ns_t_a, TRUE); if (spf_server->debug) SPF_debugf( "%d: found %d A records for %s (herrno: %d)", i, rr_a->num_rr, rr_ptr->rr[i]->ptr, rr_a->herrno ); if (rr_a->herrno == TRY_AGAIN) { SPF_dns_rr_free(rr_ptr); SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR( SPF_E_DNS_ERROR ); } for (j = 0; j < rr_a->num_rr; j++) { /* XXX MX has a 'continue' case here which should be hoisted. */ if (spf_server->debug) { INET_NTOP(AF_INET, &rr_a->rr[j]->a.s_addr, ip4_buf, sizeof(ip4_buf)); SPF_debugf("%d: %d: found %s", i, j, ip4_buf); } if (rr_a->rr[j]->a.s_addr == spf_request->ipv4.s_addr) { if (SPF_i_match_domain(spf_server, rr_ptr->rr[i]->ptr, lookup)) { SPF_dns_rr_free(rr_ptr); SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_MECH(mech->prefix_type); } } } SPF_dns_rr_free(rr_a); } SPF_dns_rr_free(rr_ptr); if (max_exceeded) { SPF_FREE_LOOKUP_DATA(); return DONE(SPF_RESULT_PERMERROR, SPF_REASON_NONE, SPF_E_BIG_DNS); } } else if ( spf_request->client_ver == AF_INET6 ) { rr_ptr = SPF_dns_rlookup6(resolver, spf_request->ipv6, ns_t_ptr, TRUE); if ( spf_server->debug ) { INET_NTOP( AF_INET6, &spf_request->ipv6.s6_addr, ip6_buf, sizeof( ip6_buf ) ); SPF_debugf( "found %d PTR records for %s (herrno: %d)", rr_ptr->num_rr, ip6_buf, rr_ptr->herrno ); } if( rr_ptr->herrno == TRY_AGAIN ) { SPF_dns_rr_free(rr_ptr); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR( SPF_E_DNS_ERROR ); } max_ptr = rr_ptr->num_rr; max_exceeded = 0; if (max_ptr > spf_server->max_dns_ptr) { max_ptr = SPF_server_get_max_dns_ptr(spf_server); max_exceeded = 1; } for (i = 0; i < max_ptr; i++) { /* XXX MX has a 'continue' case here which should be hoisted. */ rr_aaaa = SPF_dns_lookup(resolver, rr_ptr->rr[i]->ptr, ns_t_aaaa, TRUE); if ( spf_server->debug ) SPF_debugf("%d: found %d AAAA records for %s (herrno: %d)", i, rr_aaaa->num_rr, rr_ptr->rr[i]->ptr, rr_aaaa->herrno); if( rr_aaaa->herrno == TRY_AGAIN ) { SPF_dns_rr_free(rr_ptr); SPF_dns_rr_free(rr_aaaa); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR( SPF_E_DNS_ERROR ); } for( j = 0; j < rr_aaaa->num_rr; j++ ) { /* XXX MX has a 'continue' case here which should be hoisted. */ if ( spf_server->debug ) { INET_NTOP(AF_INET6, &rr_aaaa->rr[j]->aaaa.s6_addr, ip6_buf, sizeof(ip6_buf)); SPF_debugf( "%d: %d: found %s", i, j, ip6_buf ); } if (memcmp(&rr_aaaa->rr[j]->aaaa, &spf_request->ipv6, sizeof(spf_request->ipv6)) == 0) { if (SPF_i_match_domain(spf_server, rr_ptr->rr[i]->ptr, lookup)) { SPF_dns_rr_free( rr_ptr ); SPF_dns_rr_free(rr_aaaa); SPF_FREE_LOOKUP_DATA(); return DONE_MECH( mech->prefix_type ); } } } SPF_dns_rr_free(rr_aaaa); } SPF_dns_rr_free(rr_ptr); if (max_exceeded) { SPF_FREE_LOOKUP_DATA(); return DONE(SPF_RESULT_PERMERROR, SPF_REASON_NONE, SPF_E_BIG_DNS); } } break; case MECH_INCLUDE: case MECH_REDIRECT: SPF_ADD_DNS_MECH(); err = SPF_record_expand_data(spf_server, spf_request, spf_response, SPF_mech_data(mech), SPF_mech_data_len(mech), &buf, &buf_len ); if ( err == SPF_E_NO_MEMORY ) { SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR( err ); } if ( err ) { SPF_FREE_LOOKUP_DATA(); return DONE_PERMERR( err ); } lookup = buf; /* XXX Maintain a stack depth here. Limit at 10. */ if (strcmp(lookup, spf_request->cur_dom) == 0) { SPF_FREE_LOOKUP_DATA(); return DONE_PERMERR( SPF_E_RECURSIVE ); } /* * get the (compiled) SPF record */ spf_record_subr = NULL; /* Remember to reset this. */ save_cur_dom = spf_request->cur_dom; spf_request->cur_dom = lookup; err = SPF_server_get_record(spf_server, spf_request, spf_response, &spf_record_subr); if ( spf_server->debug > 0 ) SPF_debugf( "include/redirect: got SPF record: %s", SPF_strerror( err ) ); if (err != SPF_E_SUCCESS) { spf_request->cur_dom = save_cur_dom; if (spf_record_subr) SPF_record_free(spf_record_subr); SPF_FREE_LOOKUP_DATA(); if (err == SPF_E_DNS_ERROR) return DONE_TEMPERR( err ); else return DONE_PERMERR( err ); } SPF_ASSERT_NOTNULL(spf_record_subr); /* * If we are a redirect which is not within the scope * of any include. */ if (mech->mech_type == MECH_REDIRECT) { save_spf_response = NULL; if (spf_response->spf_record_exp == spf_record) spf_response->spf_record_exp = spf_record_subr; SPF_ASSERT_NOTNULL(spf_response->spf_record_exp); } else { save_spf_response = spf_response; spf_response = SPF_response_new(spf_request); if (! spf_response) { if (spf_record_subr) SPF_record_free(spf_record_subr); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR(SPF_E_NO_MEMORY); } spf_response->spf_record_exp = spf_record; SPF_ASSERT_NOTNULL(spf_response->spf_record_exp); } /* * find out whether this configuration passes */ err = SPF_record_interpret(spf_record_subr, spf_request, spf_response, depth + 1); spf_request->cur_dom = save_cur_dom; /* Now, if we were a redirect, the child called done() * and used spf_record_exp. In that case, we need not * worry that spf_record_subr is invalid after the free. * If we were not a redirect, then spf_record_subr * is still the record it was in the first place. * Thus we do not need to reset it now. */ SPF_record_free(spf_record_subr); spf_record_subr = NULL; if ( spf_server->debug > 0 ) SPF_debugf( "include/redirect: executed SPF record: %s result: %s reason: %s", SPF_strerror( err ), SPF_strresult( spf_response->result ), SPF_strreason( spf_response->reason ) ); if (mech->mech_type == MECH_REDIRECT) { SPF_FREE_LOOKUP_DATA(); return err; /* One way or the other */ } else { // if (spf_response->result != SPF_RESULT_INVALID) { /* Set everything up properly again. */ spf_response_subr = spf_response; spf_response = save_spf_response; save_spf_response = NULL; /* Rewrite according to prefix of include */ switch (SPF_response_result(spf_response_subr)) { case SPF_RESULT_PASS: /* Pass */ SPF_FREE_LOOKUP_DATA(); SPF_response_free(spf_response_subr); return DONE_MECH( mech->prefix_type ); case SPF_RESULT_FAIL: case SPF_RESULT_SOFTFAIL: case SPF_RESULT_NEUTRAL: /* No match */ SPF_response_free(spf_response_subr); break; case SPF_RESULT_TEMPERROR: /* Generate TempError */ err = SPF_response_errcode(spf_response_subr); SPF_FREE_LOOKUP_DATA(); SPF_response_free(spf_response_subr); return DONE_TEMPERR( err ); case SPF_RESULT_NONE: /* Generate PermError */ SPF_FREE_LOOKUP_DATA(); SPF_response_free(spf_response_subr); return DONE_PERMERR(SPF_E_INCLUDE_RETURNED_NONE); case SPF_RESULT_PERMERROR: case SPF_RESULT_INVALID: /* Generate PermError */ err = SPF_response_errcode(spf_response_subr); SPF_FREE_LOOKUP_DATA(); SPF_response_free(spf_response_subr); return DONE_PERMERR( err ); } #if 0 SPF_FREE_LOOKUP_DATA(); return err; /* The sub-interpret called done() */ #endif } break; case MECH_IP4: memcpy(&addr4, SPF_mech_ip4_data(mech), sizeof(addr4)); if ( SPF_i_match_ip4( spf_server, spf_request, mech, addr4 ) ) { SPF_FREE_LOOKUP_DATA(); return DONE_MECH( mech->prefix_type ); } break; case MECH_IP6: memcpy(&addr6, SPF_mech_ip6_data(mech), sizeof(addr6)); if ( SPF_i_match_ip6( spf_server, spf_request, mech, addr6 ) ) { SPF_FREE_LOOKUP_DATA(); return DONE_MECH( mech->prefix_type ); } break; case MECH_EXISTS: SPF_ADD_DNS_MECH(); err = SPF_record_expand_data(spf_server, spf_request, spf_response, SPF_mech_data(mech),SPF_mech_data_len(mech), &buf, &buf_len); if (err != SPF_E_SUCCESS) { SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR( err ); } lookup = buf; rr_a = SPF_dns_lookup(resolver, lookup, ns_t_a, FALSE ); if ( spf_server->debug ) SPF_debugf( "found %d A records for %s (herrno: %d)", rr_a->num_rr, lookup, rr_a->herrno ); if( rr_a->herrno == TRY_AGAIN ) { SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_TEMPERR(SPF_E_DNS_ERROR); } if ( rr_a->num_rr > 0 ) { SPF_dns_rr_free(rr_a); SPF_FREE_LOOKUP_DATA(); return DONE_MECH(mech->prefix_type); } SPF_dns_rr_free(rr_a); break; case MECH_ALL: SPF_FREE_LOOKUP_DATA(); if (mech->prefix_type == PREFIX_UNKNOWN) return DONE_PERMERR(SPF_E_UNKNOWN_MECH); return DONE_MECH(mech->prefix_type); break; default: SPF_FREE_LOOKUP_DATA(); return DONE_PERMERR(SPF_E_UNKNOWN_MECH); break; } /* * execute the local policy */ if ( mech == local_policy ) { err = SPF_record_interpret(spf_server->local_policy, spf_request, spf_response, depth + 1); if ( spf_server->debug > 0 ) SPF_debugf( "local_policy: executed SPF record: %s result: %s reason: %s", SPF_strerror( err ), SPF_strresult( spf_response->result ), SPF_strreason( spf_response->reason ) ); if (spf_response->result != SPF_RESULT_INVALID) { SPF_FREE_LOOKUP_DATA(); return err; } } mech = SPF_mech_next( mech ); } SPF_FREE_LOOKUP_DATA(); /* falling off the end is the same as ?all */ return DONE( SPF_RESULT_NEUTRAL, SPF_REASON_DEFAULT, SPF_E_SUCCESS ); }
static SPF_errcode_t SPF_i_set_header_comment(SPF_response_t *spf_response) { SPF_server_t *spf_server; SPF_request_t *spf_request; char *spf_source; size_t len; char ip4_buf[ INET_ADDRSTRLEN ]; char ip6_buf[ INET6_ADDRSTRLEN ]; const char *ip; char *buf; char *sender_dom; char *p, *p_end; SPF_ASSERT_NOTNULL(spf_response); spf_request = spf_response->spf_request; SPF_ASSERT_NOTNULL(spf_request); spf_server = spf_request->spf_server; SPF_ASSERT_NOTNULL(spf_server); if (spf_response->header_comment) free(spf_response->header_comment); spf_response->header_comment = NULL; /* Is this cur_dom? */ sender_dom = spf_request->env_from_dp; if (sender_dom == NULL) sender_dom = spf_request->helo_dom; if ( spf_response->reason == SPF_REASON_LOCAL_POLICY ) { spf_source = strdup( "local policy" ); } else if ( spf_response->reason == SPF_REASON_2MX ) { if ( spf_request->rcpt_to_dom == NULL || spf_request->rcpt_to_dom[0] == '\0' ) SPF_error( "RCPT TO domain is NULL" ); spf_source = strdup( spf_request->rcpt_to_dom ); } else if ( sender_dom == NULL ) { spf_source = strdup( "unknown domain" ); } else { len = strlen( sender_dom ) + sizeof( "domain of " ); spf_source = malloc( len ); if ( spf_source ) snprintf( spf_source, len, "domain of %s", sender_dom ); } if ( spf_source == NULL ) return SPF_E_INTERNAL_ERROR; ip = NULL; if ( spf_request->client_ver == AF_INET ) { ip = inet_ntop( AF_INET, &spf_request->ipv4, ip4_buf, sizeof( ip4_buf ) ); } else if (spf_request->client_ver == AF_INET6 ) { ip = inet_ntop( AF_INET6, &spf_request->ipv6, ip6_buf, sizeof( ip6_buf ) ); } if ( ip == NULL ) ip = "(unknown ip address)"; len = strlen( SPF_request_get_rec_dom(spf_request) ) + strlen( spf_source ) + strlen( ip ) + 80; buf = malloc( len ); if ( buf == NULL ) { free( spf_source ); return SPF_E_INTERNAL_ERROR; } p = buf; p_end = p + len; /* create the stock header comment */ p += snprintf( p, p_end - p, "%s: ", SPF_request_get_rec_dom(spf_request) ); switch(spf_response->result) { case SPF_RESULT_PASS: if ( spf_response->reason == SPF_REASON_LOCALHOST ) snprintf( p, p_end - p, "localhost is always allowed." ); else if ( spf_response->reason == SPF_REASON_2MX ) snprintf( p, p_end - p, "message received from %s which is an MX secondary for %s.", ip, spf_source ); else snprintf( p, p_end - p, "%s designates %s as permitted sender", spf_source, ip ); break; case SPF_RESULT_FAIL: snprintf( p, p_end - p, "%s does not designate %s as permitted sender", spf_source, ip ); break; case SPF_RESULT_SOFTFAIL: snprintf( p, p_end - p, "transitioning %s does not designate %s as permitted sender", spf_source, ip ); break; case SPF_RESULT_PERMERROR: snprintf(p, p_end - p, "error in processing during lookup of %s: %s", spf_source, SPF_strerror(spf_response->err)); break; case SPF_RESULT_NEUTRAL: snprintf(p, p_end - p, "%s is neither permitted nor denied by %s", ip, spf_source); break; case SPF_RESULT_NONE: snprintf(p, p_end - p, "%s does not provide an SPF record", spf_source); break; case SPF_RESULT_TEMPERROR: snprintf(p, p_end - p, "encountered temporary error during SPF processing of %s", spf_source ); break; default: snprintf( p, p_end - p, "error: unknown SPF result %d encountered while checking %s for %s", spf_response->result, ip, spf_source ); break; } if (spf_source) free(spf_source); spf_response->header_comment = SPF_sanitize(spf_server, buf); return SPF_E_SUCCESS; }
int spfc(thread_pool_t *info, thread_ctx_t *thread_ctx, edict_t *edict) { struct timespec ts, start, now, timeleft; chkresult_t *result; grey_tuple_t *request; SPF_server_t *spf_server = NULL; SPF_request_t *spf_request = NULL; SPF_response_t *spf_response = NULL; SPF_response_t *spf_response_2mx = NULL; const char *smtp_error; int ret; logstr(GLOG_DEBUG, "spfc called"); request = (grey_tuple_t *)edict->job; assert(request); result = (chkresult_t *)Malloc(sizeof(chkresult_t)); memset(result, 0, sizeof(*result)); result->judgment = J_UNDEFINED; result->checkname = "spf"; /* initialize if we are not yet initialized */ if (NULL == thread_ctx->state) { /* Initialize */ spf_server = SPF_server_new(SPF_DNS_CACHE, SPF_DEBUG_LEVEL); if (NULL == spf_server) { logstr(GLOG_ERROR, "SPF_server_new failed"); goto FINISH; } thread_ctx->state = spf_server; thread_ctx->cleanup = &cleanup_spfc; } else { spf_server = (SPF_server_t *) thread_ctx->state; } /* Now we are ready to query */ ret = SPF_server_set_explanation(spf_server, "Please see http://www.openspf.org/Why?id=%{S}&ip=%{C}", &spf_response); if (ret) logstr(GLOG_ERROR, "SPF: setting explanation failed"); spf_request = SPF_request_new(spf_server); ret = SPF_request_set_ipv4_str(spf_request, request->client_address); if (ret) { logstr(GLOG_ERROR, "invalid IP address %s", request->client_address); goto CLEANUP; } if (request->helo_name) { ret = SPF_request_set_helo_dom(spf_request, request->helo_name); if (ret) { logstr(GLOG_ERROR, "invalid HELO domain: %s.", request->helo_name); goto CLEANUP; } } ret = SPF_request_set_env_from(spf_request, request->sender); if (ret) { logstr(GLOG_ERROR, "invalid envelope sender address %s", request->sender); goto CLEANUP; } ret = SPF_request_query_mailfrom(spf_request, &spf_response); switch (ret) { case SPF_E_SUCCESS: case SPF_E_NOT_SPF: break; default: logstr(GLOG_ERROR, "spf: sender based query failed: %s", SPF_strerror(ret)); goto CLEANUP; } /* XXX: do we need 2mx checks? */ ret = SPF_response_result(spf_response); switch (ret) { case SPF_RESULT_FAIL: result->judgment = J_BLOCK; logstr(GLOG_DEBUG, "SPF: fail"); smtp_error = SPF_response_get_smtp_comment(spf_response); if (smtp_error) result->reason = strdup(smtp_error); else result->reason = strdup("SPF: policy violation: (no message available)"); break; case SPF_RESULT_SOFTFAIL: result->judgment = J_SUSPICIOUS; logstr(GLOG_DEBUG, "SPF softfail"); result->weight = 1; /* FIXME: configurable */ break; case SPF_RESULT_PASS: result->judgment = J_UNDEFINED; logstr(GLOG_DEBUG, "SPF: pass"); break; case SPF_RESULT_NEUTRAL: result->judgment = J_UNDEFINED; logstr(GLOG_DEBUG, "SPF: neutral"); break; case SPF_RESULT_NONE: result->judgment = J_UNDEFINED; logstr(GLOG_DEBUG, "SPF: no record"); break; default: logstr(GLOG_DEBUG, "Unexpected SPF result (%d)", ret); } CLEANUP: if (spf_request) SPF_request_free(spf_request); if (spf_response) SPF_response_free(spf_response); FINISH: send_result(edict, result); logstr(GLOG_DEBUG, "spfc returning"); request_unlink(request); return 0; }