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/*++
/* NAME
/* own_inet_addr 3
/* SUMMARY
/* determine if IP address belongs to this mail system instance
/* SYNOPSIS
/* #include <own_inet_addr.h>
/*
/* int own_inet_addr(addr)
/* struct in_addr *addr;
/*
/* INET_ADDR_LIST *own_inet_addr_list()
/* DESCRIPTION
/* own_inet_addr() determines if the specified IP address belongs
/* to this mail system instance, i.e. if this mail system instance
/* is supposed to be listening on this specific IP address.
/*
/* own_inet_addr_list() returns the list of all addresses that
/* belong to this mail system instance.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#ifdef STRCASECMP_IN_STRINGS_H
#include <strings.h>
#endif
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <inet_addr_list.h>
#include <inet_addr_local.h>
#include <inet_addr_host.h>
#include <stringops.h>
/* Global library. */
#include <mail_params.h>
#include <own_inet_addr.h>
/* Application-specific. */
static INET_ADDR_LIST addr_list;
/* own_inet_addr_init - initialize my own address list */
static void own_inet_addr_init(INET_ADDR_LIST *addr_list)
{
char *hosts;
char *host;
char *sep = " \t,";
char *bufp;
inet_addr_list_init(addr_list);
/*
* If we are listening on all interfaces (default), ask the system what
* the interfaces are.
*/
if (strcasecmp(var_inet_interfaces, DEF_INET_INTERFACES) == 0) {
if (inet_addr_local(addr_list) == 0)
msg_fatal("could not find any active network interfaces");
#if 0
if (addr_list->used == 1)
msg_warn("found only one active network interface: %s",
inet_ntoa(addr_list->addrs[0]));
#endif
}
/*
* If we are supposed to be listening only on specific interface
* addresses (virtual hosting), look up the addresses of those
* interfaces.
*/
else {
bufp = hosts = mystrdup(var_inet_interfaces);
while ((host = mystrtok(&bufp, sep)) != 0)
if (inet_addr_host(addr_list, host) == 0)
msg_fatal("config variable %s: host not found: %s",
VAR_INET_INTERFACES, host);
myfree(hosts);
}
}
/* own_inet_addr - is this my own internet address */
int own_inet_addr(struct in_addr * addr)
{
int i;
if (addr_list.used == 0)
own_inet_addr_init(&addr_list);
for (i = 0; i < addr_list.used; i++)
if (addr->s_addr == addr_list.addrs[i].s_addr)
return (1);
return (0);
}
/* own_inet_addr_list - return list of addresses */
INET_ADDR_LIST *own_inet_addr_list(void)
{
if (addr_list.used == 0)
own_inet_addr_init(&addr_list);
return (&addr_list);
}
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