X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fdomain.c;h=2e16a20afe7855ec7bc699dbead29bda24163fab;hb=HEAD;hp=25a4d7afc1a22ebe509a170336283f1a7813918b;hpb=36908e5d8ca8ad1207d7f8466c0858c71c9588b4;p=citadel.git

diff --git a/citadel/domain.c b/citadel/domain.c
deleted file mode 100644
index 25a4d7afc..000000000
--- a/citadel/domain.c
+++ /dev/null
@@ -1,210 +0,0 @@
-/*
- * DNS lookup for SMTP sender
- *
- * Copyright (c) 1987-2021 by the citadel.org team
- *
- * This program is open source software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include "sysdep.h"
-#include <stdio.h>
-#include <syslog.h>
-#ifdef HAVE_RESOLV_H
-#include <arpa/nameser.h>
-#ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
-#endif
-#include <resolv.h>
-#endif
-#include <libcitadel.h>
-#include "sysdep_decls.h"
-#include "citadel.h"
-#include "domain.h"
-#include "internet_addressing.h"
-
-
-/*
- * get_hosts() checks the Internet configuration for various types of
- * entries and returns them in the same format as getmx() does -- fill the
- * buffer with a delimited list of hosts and return the number of hosts.
- * 
- * This is used to fetch MX smarthosts, SpamAssassin hosts, etc.
- */
-int get_hosts(char *mxbuf, char *rectype) {
-	int config_lines;
-	int i;
-	char buf[256];
-	char host[256], type[256];
-	int total_smarthosts = 0;
-
-	if (inetcfg == NULL) return(0);
-	strcpy(mxbuf, "");
-
-	config_lines = num_tokens(inetcfg, '\n');
-	for (i=0; i<config_lines; ++i) {
-		extract_token(buf, inetcfg, i, '\n', sizeof buf);
-		extract_token(host, buf, 0, '|', sizeof host);
-		extract_token(type, buf, 1, '|', sizeof type);
-
-		if (!strcasecmp(type, rectype)) {
-			strcat(mxbuf, host);
-			strcat(mxbuf, "|");
-			++total_smarthosts;
-		}
-	}
-
-	return(total_smarthosts);
-}
-
-
-/*
- * Compare the preference of two MX records.  First check by the actual
- * number listed in the MX record.  If they're identical, randomize the
- * result.
- */
-int mx_compare_pref(const void *mx1, const void *mx2) {
-	int pref1;
-	int pref2;
-
-	pref1 = ((const struct mx *)mx1)->pref;
-	pref2 = ((const struct mx *)mx2)->pref;
-
-	if (pref1 > pref2) {
-		return(1);
-	}
-	else if (pref1 < pref2) {
-		return(0);
-	}
-	else {
-		return(rand() % 2);
-	}
-}
-
-
-/* 
- * getmx()
- *
- * Return one or more MX's for a mail destination.
- *
- * Upon success, it fills 'mxbuf' with one or more MX hosts, separated by
- * vertical bar characters, and returns the number of hosts as its return
- * value.  If no MX's are found, it returns 0.
- *
- */
-int getmx(char *mxbuf, char *dest) {
-
-#ifdef HAVE_RESOLV_H
-	union {
-			u_char bytes[1024];
-			HEADER header;
-    } answer;
-#endif
-
-	int ret;
-	unsigned char *startptr, *endptr, *ptr;
-	char expanded_buf[1024];
-	unsigned short pref, type;
-	int n = 0;
-	int qdcount;
-
-	struct mx *mxrecs = NULL;
-	int num_mxrecs = 0;
-
-	/* If we're configured to send all mail to a smart-host, then our
-	 * job here is really easy.
-	 */
-	n = get_hosts(mxbuf, "smarthost");
-	if (n > 0) {
-		return(n);
-	}
-
-	/*
-	 * No smart-host?  Look up the best MX for a site.
-	 * Make a call to the resolver library.
-	 */
-
-	ret = res_query(dest, C_IN, T_MX, (unsigned char *)answer.bytes, sizeof(answer));
-
-	if (ret < 0) {
-		mxrecs = malloc(sizeof(struct mx));
-		mxrecs[0].pref = 0;
-		strcpy(mxrecs[0].host, dest);
-		num_mxrecs = 1;
-	}
-	else {
-		/* If we had to truncate, shrink the number to avoid fireworks */
-		if (ret > sizeof(answer)) {
-			ret = sizeof(answer);
-		}
-	
-		startptr = &answer.bytes[0];		// start and end of buffer
-		endptr = &answer.bytes[ret];
-		ptr = startptr + HFIXEDSZ;		// advance past header
-	
-		for (qdcount = ntohs(answer.header.qdcount); qdcount--; ptr += ret + QFIXEDSZ) {
-			if ((ret = dn_skipname(ptr, endptr)) < 0) {
-				syslog(LOG_DEBUG, "domain: dn_skipname error");
-				return(0);
-			}
-		}
-	
-		while(1) {
-			TRACE;
-			memset(expanded_buf, 0, sizeof(expanded_buf));
-			ret = dn_expand(startptr, endptr, ptr, expanded_buf, sizeof(expanded_buf));
-			if (ret < 0) break;
-			ptr += ret;
-	
-			GETSHORT(type, ptr);
-			ptr += INT16SZ + INT32SZ;
-			GETSHORT(n, ptr);
-	
-			syslog(LOG_DEBUG, "\033[35mgetmx: found record of type %d and length %d\033[0m", type, n);
-			if (type != T_MX) {
-				ptr += n;
-			}
-	
-			else {
-				GETSHORT(pref, ptr);
-				ret = dn_expand(startptr, endptr, ptr, expanded_buf, sizeof(expanded_buf));
-				ptr += ret;
-	
-				++num_mxrecs;
-				if (mxrecs == NULL) {
-					mxrecs = malloc(sizeof(struct mx));
-				}
-				else {
-					mxrecs = realloc(mxrecs, (sizeof(struct mx) * num_mxrecs) );
-				}
-	
-				mxrecs[num_mxrecs - 1].pref = pref;
-				strcpy(mxrecs[num_mxrecs - 1].host, expanded_buf);
-			}
-		}
-	}
-
-	/* Sort the MX records by preference */
-	if (num_mxrecs > 1) {
-		qsort(mxrecs, num_mxrecs, sizeof(struct mx), mx_compare_pref);
-	}
-
-	strcpy(mxbuf, "");
-	for (n=0; n<num_mxrecs; ++n) {
-		syslog(LOG_DEBUG, "\033[35mgetmx: %d : <%s>\033[0m", n, mxrecs[n].host);
-		strcat(mxbuf, mxrecs[n].host);
-		strcat(mxbuf, "|");
-	}
-	free(mxrecs);
-
-	/*
-	 * Append any fallback smart hosts we have configured.
-	 */
-	num_mxrecs += get_hosts(&mxbuf[strlen(mxbuf)], "fallbackhost");
-	return(num_mxrecs);
-}