sendmail/aux/addr.c

/*
 * Copyright (c) 1983 Eric P. Allman
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)addr.c      5.2 (Berkeley) 2/14/89";
#endif /* not lint */

# include "postbox.h"

/*
**  PUTONQ -- put an address node on the end of a queue
**
**      Parameters:
**              a -- the address to put on the queue.
**              q -- the queue to put it on.
**
**      Returns:
**              none
**
**      Side Effects:
**              none
**
**      Called By:
**              alias
**              recipient
*/

putonq(a, q)
        register ADDRESS *a;
        register ADDRESS *q;
{
        if (q->q_prev == NULL)
        {
                q->q_prev = q->q_next = a;
                a->q_prev = NULL;
        }
        else
        {
                a->q_prev = q->q_prev;
                q->q_prev->q_next = a;
                q->q_prev = a;
        }
        a->q_next = NULL;
}
\f/*
**  TKOFFQ -- remove address node from queue
**
**      Takes a node off of a queue, from anyplace in the queue.
**
**      Parameters:
**              a -- the node to remove.
**              q -- the queue to remove it from.
**
**      Returns:
**              none
**
**      Side Effects:
**              none
**
**      Called By:
**              alias
*/

tkoffq(a, q)
        register ADDRESS *a;
        register ADDRESS *q;
{
        if (a->q_prev != NULL)
                a->q_prev->q_next = a->q_next;
        else
                q->q_next = a->q_next;
        if (a->q_next != NULL)
                a->q_next->q_prev = a->q_prev;
        else
                q->q_prev = a->q_prev;
}
\f/*
**  SAMEADDR -- Determine if tow addresses are the same
**
**      This is not just a straight comparison -- if the mailer doesn't
**      care about the host we just ignore it, etc.
**
**      Parameters:
**              a, b -- pointers to the internal forms to compare.
**              wildflg -- if TRUE, 'a' may have no user specified,
**                      in which case it is to match anything.
**
**      Returns:
**              TRUE -- they represent the same mailbox.
**              FALSE -- they don't.
**
**      Side Effects:
**              none.
**
**      Called By:
**              recipient
**              alias
*/

bool
sameaddr(a, b, wildflg)
        register ADDRESS *a;
        register ADDRESS *b;
        bool wildflg;
{
        /* if they don't have the same mailer, forget it */
        if (a->q_mailer != b->q_mailer)
                return (FALSE);

        /* if the user isn't the same, we can drop out */
        if ((!wildflg || a->q_user[0] != '\0') && strcmp(a->q_user, b->q_user) != 0)
                return (FALSE);

        /* if the mailer ignores hosts, we have succeeded! */
        if (bitset(M_NOHOST, Mailer[a->q_mailer]->m_flags))
                return (TRUE);

        /* otherwise compare hosts (but be careful for NULL ptrs) */
        if (a->q_host == NULL || b->q_host == NULL)
                return (FALSE);
        if (strcmp(a->q_host, b->q_host) != 0)
                return (FALSE);

        return (TRUE);
}