-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include "mx.h"
-#include "fetchmail.h"
-
-#define MX_RETRIES 3
-
-static int is_ip_alias(const char *name1,const char *name2)
-/*
- * Given two hostnames as arguments, returns TRUE if they
- * have at least one IP address in common.
- * It is meant to be called by the is_host_alias() function in driver.c
- * No check is done on errors returned by gethostbyname,
- * the calling function does them.
- */
-{
- typedef unsigned char address_t[sizeof (struct in_addr)];
- typedef struct _address_e
- {
- struct _address_e *next;
- address_t address;
- }
- address_e;
- address_e *host_a_addr, *host_b_addr,*dummy_addr;
-
- int i;
- struct hostent *hp;
- char **p;
-
- hp = gethostbyname(name1);
-
- dummy_addr = (address_e *)NULL;
-
- for (i=0,p = hp->h_addr_list; *p != 0; i++,p++)
- {
- struct in_addr in;
- (void) memcpy(&in.s_addr, *p, sizeof (in.s_addr));
- host_a_addr = (address_e *)xmalloc(sizeof( address_e));
- memset (host_a_addr,0, sizeof (address_e));
- host_a_addr->next = dummy_addr;
- (void) memcpy(&host_a_addr->address, *p, sizeof (in.s_addr));
- dummy_addr = host_a_addr;
- }
-
- hp = gethostbyname(name2);
-
- dummy_addr = (address_e *)NULL;
- for (i=0,p = hp->h_addr_list; *p != 0; i++,p++)
- {
- struct in_addr in;
- (void) memcpy(&in.s_addr, *p, sizeof (in.s_addr));
- host_b_addr = (address_e *)xmalloc(sizeof( address_e));
- memset (host_b_addr,0, sizeof (address_e));
- host_b_addr->next = dummy_addr;
- (void) memcpy(&host_b_addr->address, *p, sizeof (in.s_addr));
- dummy_addr = host_b_addr;
- }
-
- while (host_a_addr)
- {
- while (host_b_addr)
- {
- if (!memcmp(host_b_addr->address,host_a_addr->address, sizeof (address_t)))
- return (TRUE);