*
*/
+#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <netinet/in.h>
#include <stdio.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 "sysdep_decls.h"
#include "citadel.h"
#include "domain.h"
* number listed in the MX record. If they're identical, randomize the
* result.
*/
-inline int mx_compare_pref(int pref1, int pref2) {
+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);
}
}
-/*
- * sort_mxrecs()
- *
- * Sort a pile of MX records (struct mx, definted in domain.h) by preference
- *
- */
-void sort_mxrecs(struct mx *mxrecs, int num_mxrecs) {
- int a, b;
- struct mx hold1, hold2;
-
- if (num_mxrecs < 2) return;
-
- /* do the sort */
- for (a = num_mxrecs - 2; a >= 0; --a) {
- for (b = 0; b <= a; ++b) {
- if (mx_compare_pref(mxrecs[b].pref,mxrecs[b+1].pref)) {
- memcpy(&hold1, &mxrecs[b], sizeof(struct mx));
- memcpy(&hold2, &mxrecs[b+1], sizeof(struct mx));
- memcpy(&mxrecs[b], &hold2, sizeof(struct mx));
- memcpy(&mxrecs[b+1], &hold1, sizeof(struct mx));
- }
- }
- }
-}
-
-
-
/*
* getmx()
*
*
*/
int getmx(char *mxbuf, char *dest) {
+
+#ifdef HAVE_RESOLV_H
union {
u_char bytes[1024];
HEADER header;
} answer;
+#else
+ char buf[SIZ];
+ FILE *fp;
+#endif
+
int ret;
unsigned char *startptr, *endptr, *ptr;
char expanded_buf[1024];
- char buf[SIZ];
- FILE *fp;
unsigned short pref, type;
int n = 0;
int qdcount;
n = get_hosts(mxbuf, "smarthost");
if (n > 0) return(n);
-
/*
* No smart-host? Look up the best MX for a site.
*/
-#ifdef __CYGWIN__
+#ifndef HAVE_RESOLV_H
/*
* On systems with b0rken or non-standard resolver libraries, learn
* the MX records by calling "nslookup" from the command line.
+ *
+ * Someday.
+ *
*/
- sprintf(buf, "nslookup -query=mx %s", dest);
- fp = popen(buf, "r");
- if (fp == NULL) return(0);
- while (fgets(buf, sizeof buf, fp) != NULL) {
- buf[strlen(buf) - 1] = 0;
- lprintf(9, "RESOLV: %s\n", buf);
- }
- pclose(fp);
- return(0); /* FIXME */
-#else /* __CYGWIN__ */
+ return(0);
+
+#else /* HAVE_RESOLV_H */
/*
* Make a call to the standard resolver library.
for (qdcount = ntohs(answer.header.qdcount); qdcount--; ptr += ret + QFIXEDSZ) {
if ((ret = dn_skipname(ptr, endptr)) < 0) {
- lprintf(9, "dn_skipname error\n");
+ lprintf(CTDL_DEBUG, "dn_skipname error\n");
return(0);
}
}
}
}
}
-#endif /* __CYGWIN__ */
+#endif /* HAVE_RESOLV_H */
- sort_mxrecs(mxrecs, num_mxrecs);
+ /* 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) {