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1b79f745fe
openldap/clients/mail500/main.c
Hallvard Furuseth a8711b282e Remove warning: Enclose initializer in {}.
1999-03-09 07:17:48 +00:00

1687 lines
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/*
* Copyright (c) 1990 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. 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'' without express or implied warranty.
*/
#include "portable.h"
#include <stdio.h>
#include <stdlib.h>
#include <ac/ctype.h>
#include <ac/signal.h>
#include <ac/string.h>
#include <ac/sysexits.h>
#include <ac/syslog.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include <ac/wait.h>
#include <sys/stat.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include "lber.h"
#include "ldap.h"
#include "ldapconfig.h"
#ifndef MAIL500_BOUNCEFROM
#define MAIL500_BOUNCEFROM "<>"
#endif
#define USER 0x01
#define GROUP_ERRORS 0x02
#define GROUP_REQUEST 0x04
#define GROUP_MEMBERS 0x08
#define GROUP_OWNER 0x10
#define ERROR "error"
#define ERRORS "errors"
#define REQUEST "request"
#define REQUESTS "requests"
#define MEMBERS "members"
#define OWNER "owner"
#define OWNERS "owners"
LDAP *ld;
char *vacationhost = NULL;
char *errorsfrom = NULL;
char *mailfrom = NULL;
char *host = NULL;
char *ldaphost = NULL;
int hostlen = 0;
int debug;
typedef struct errs {
int e_code;
#define E_USERUNKNOWN 1
#define E_AMBIGUOUS 2
#define E_NOEMAIL 3
#define E_NOREQUEST 4
#define E_NOERRORS 5
#define E_BADMEMBER 6
#define E_JOINMEMBERNOEMAIL 7
#define E_MEMBERNOEMAIL 8
#define E_LOOP 9
#define E_NOMEMBERS 10
#define E_NOOWNER 11
#define E_GROUPUNKNOWN 12
char *e_addr;
union {
char *e_u_loop;
LDAPMessage *e_u_msg;
} e_union;
#define e_msg e_union.e_u_msg
#define e_loop e_union.e_u_loop
} Error;
typedef struct groupto {
char *g_dn;
char *g_errorsto;
char **g_members;
} Group;
typedef struct baseinfo {
char *b_dn; /* dn to start searching at */
char b_rdnpref; /* give rdn's preference when searching? */
int b_search; /* ORed with the type of thing the address */
/* looks like (USER, GROUP_ERRORS, etc.) */
/* to see if this should be searched */
char *b_filter[3]; /* filter to apply - name substituted for %s */
/* (up to three of them) */
} Base;
Base base[] = {
{"ou=People, dc=OpenLDAP, dc=org",
0, USER,
{"uid=%s", "cn=%s", NULL}},
{"ou=System Groups, ou=Groups, dc=OpenLDAP, dc=org",
1, 0xff,
{"(&(cn=%s)(associatedDomain=%h))", NULL, NULL}},
{"ou=User Groups, ou=Groups, dc=OpenLDAP, dc=org",
1, 0xff,
{"(&(cn=%s)(associatedDomain=%h))", NULL, NULL}},
{NULL}
};
char *sendmailargs[] = { MAIL500_SENDMAIL, "-oMrLDAP", "-odi", "-oi", "-f", NULL, NULL };
static char *attrs[] = { "objectClass", "title", "postaladdress",
"telephoneNumber", "mail", "description", "owner",
"errorsTo", "rfc822ErrorsTo", "requestsTo",
"rfc822RequestsTo", "joinable", "cn", "member",
"moderator", "onVacation", "uid",
"suppressNoEmailError", NULL };
static void do_address( char *name, char ***to, int *nto, Group **togroups, int *ngroups, Error **err, int *nerr, int type );
static int do_group( LDAPMessage *e, char *dn, char ***to, int *nto, Group **togroups, int *ngroups, Error **err, int *nerr );
static void do_group_members( LDAPMessage *e, char *dn, char ***to, int *nto, Group **togroups, int *ngroups, Error **err, int *nerr );
static void send_message( char **to );
static void send_errors( Error *err, int nerr );
static void do_noemail( FILE *fp, Error *err, int namelen );
static void do_ambiguous( FILE *fp, Error *err, int namelen );
static void add_to( char ***list, int *nlist, char **new );
static int isgroup( LDAPMessage *e );
static void add_error( Error **err, int *nerr, int code, char *addr, LDAPMessage *msg );
static void add_group( char *dn, Group **list, int *nlist );
static void unbind_and_exit( int rc );
static int group_loop( char *dn );
static void send_group( Group *group, int ngroup );
static int has_attributes( LDAPMessage *e, char *attr1, char *attr2 );
static char **get_attributes_mail_dn( LDAPMessage *e, char *attr1, char *attr2 );
static char *canonical( char *s );
static int connect_to_x500( void );
static void do_group_errors( LDAPMessage *e, char *dn, char ***to, int *nto, Error **err, int *nerr );
static void do_group_request( LDAPMessage *e, char *dn, char ***to, int *nto, Error **err, int *nerr );
static void do_group_owner( LDAPMessage *e, char *dn, char ***to, int *nto, Error **err, int *nerr );
static void add_member( char *gdn, char *dn, char ***to, int *nto, Group **togroups, int *ngroups, Error **err, int *nerr, char **suppress );
int
main ( int argc, char **argv )
{
char *myname;
char **tolist;
Error *errlist;
Group *togroups;
int numto, ngroups, numerr, nargs;
int i, j;
if ( (myname = strrchr( argv[0], '/' )) == NULL )
myname = strdup( argv[0] );
else
myname = strdup( myname + 1 );
#ifdef SIGPIPE
(void) SIGNAL( SIGPIPE, SIG_IGN );
#endif
#ifdef LOG_MAIL
openlog( myname, OPENLOG_OPTIONS, LOG_MAIL );
#else
openlog( myname, OPENLOG_OPTIONS );
#endif
while ( (i = getopt( argc, argv, "d:f:h:l:m:v:" )) != EOF ) {
switch( i ) {
case 'd': /* turn on debugging */
debug = atoi( optarg );
break;
case 'f': /* who it's from & where errors should go */
mailfrom = strdup( optarg );
for ( j = 0; sendmailargs[j] != NULL; j++ ) {
if ( strcmp( sendmailargs[j], "-f" ) == 0 ) {
sendmailargs[j+1] = mailfrom;
break;
}
}
break;
case 'h': /* hostname */
host = strdup( optarg );
hostlen = strlen(host);
break;
case 'l': /* ldap host */
ldaphost = strdup( optarg );
break;
/* mailer-daemon address - who we should */
case 'm': /* say errors come from */
errorsfrom = strdup( optarg );
break;
case 'v': /* vacation host */
vacationhost = strdup( optarg );
break;
default:
syslog( LOG_ALERT, "unknown option" );
break;
}
}
if ( mailfrom == NULL ) {
syslog( LOG_ALERT, "required argument -f not present" );
exit( EX_TEMPFAIL );
}
if ( errorsfrom == NULL ) {
syslog( LOG_ALERT, "required argument -m not present" );
exit( EX_TEMPFAIL );
}
if ( host == NULL ) {
syslog( LOG_ALERT, "required argument -h not present" );
exit( EX_TEMPFAIL );
}
if ( connect_to_x500() != 0 )
exit( EX_TEMPFAIL );
setuid( geteuid() );
if ( debug ) {
char buf[1024];
int i;
syslog( LOG_ALERT, "running as %d", geteuid() );
strcpy( buf, argv[0] );
for ( i = 1; i < argc; i++ ) {
strcat( buf, " " );
strcat( buf, argv[i] );
}
syslog( LOG_ALERT, "args: (%s)", buf );
}
tolist = NULL;
numto = 0;
add_to( &tolist, &numto, sendmailargs );
nargs = numto;
ngroups = numerr = 0;
togroups = NULL;
errlist = NULL;
for ( i = optind; i < argc; i++ ) {
char *s;
int type;
for ( j = 0; argv[i][j] != '\0'; j++ ) {
if ( argv[i][j] == '.' || argv[i][j] == '_' )
argv[i][j] = ' ';
}
type = USER;
if ( (s = strrchr( argv[i], '-' )) != NULL ) {
s++;
if ((strcasecmp(s, ERROR) == 0) ||
(strcasecmp(s, ERRORS) == 0)) {
type = GROUP_ERRORS;
*(--s) = '\0';
} else if ((strcasecmp(s, REQUEST) == 0) ||
(strcasecmp(s, REQUESTS) == 0)) {
type = GROUP_REQUEST;
*(--s) = '\0';
} else if ( strcasecmp( s, MEMBERS ) == 0 ) {
type = GROUP_MEMBERS;
*(--s) = '\0';
} else if ((strcasecmp(s, OWNER) == 0) ||
(strcasecmp(s, OWNERS) == 0)) {
type = GROUP_OWNER;
*(--s) = '\0';
}
}
do_address( argv[i], &tolist, &numto, &togroups, &ngroups,
&errlist, &numerr, type );
}
/*
* If we have both errors and successful deliveries to make or if
* if there are any groups to deliver to, we basically need to read
* the message twice. So, we have to put it in a tmp file.
*/
if ( numerr > 0 && numto > nargs || ngroups > 0 ) {
FILE *fp;
char buf[BUFSIZ];
umask( 077 );
if ( (fp = tmpfile()) == NULL ) {
syslog( LOG_ALERT, "could not open tmp file" );
unbind_and_exit( EX_TEMPFAIL );
}
/* copy the message to a temp file */
while ( fgets( buf, sizeof(buf), stdin ) != NULL ) {
if ( fputs( buf, fp ) == EOF ) {
syslog( LOG_ALERT, "error writing tmpfile" );
unbind_and_exit( EX_TEMPFAIL );
}
}
if ( dup2( fileno( fp ), 0 ) == -1 ) {
syslog( LOG_ALERT, "could not dup2 tmpfile" );
unbind_and_exit( EX_TEMPFAIL );
}
fclose( fp );
}
/* deal with errors */
if ( numerr > 0 ) {
if ( debug ) {
syslog( LOG_ALERT, "sending errors" );
}
(void) rewind( stdin );
send_errors( errlist, numerr );
}
(void) ldap_unbind( ld );
/* send to groups with errorsTo */
if ( ngroups > 0 ) {
if ( debug ) {
syslog( LOG_ALERT, "sending to groups with errorsto" );
}
(void) rewind( stdin );
send_group( togroups, ngroups );
}
/* send to expanded aliases and groups w/o errorsTo */
if ( numto > nargs ) {
if ( debug ) {
syslog( LOG_ALERT, "sending to aliases and groups" );
}
(void) rewind( stdin );
send_message( tolist );
}
return( EX_OK );
}
static int
connect_to_x500( void )
{
int opt;
if ( (ld = ldap_open( ldaphost, 0 )) == NULL ) {
syslog( LOG_ALERT, "ldap_open failed" );
return( -1 );
}
opt = MAIL500_MAXAMBIGUOUS;
ldap_set_option(ld, LDAP_OPT_SIZELIMIT, &opt);
opt = LDAP_DEREF_ALWAYS;
ldap_set_option(ld, LDAP_OPT_DEREF, &opt);
if ( ldap_simple_bind_s( ld, NULL, NULL ) != LDAP_SUCCESS ) {
syslog( LOG_ALERT, "ldap_simple_bind_s failed" );
return( -1 );
}
return( 0 );
}
static int
mailcmp( char *a, char *b )
{
int i;
for ( i = 0; a[i] != '\0'; i++ ) {
if ( a[i] != b[i] ) {
switch ( a[i] ) {
case ' ':
case '.':
case '_':
if ( b[i] == ' ' || b[i] == '.' || b[i] == '_' )
break;
return( 1 );
default:
return( 1 );
}
}
}
return( 0 );
}
static void
do_address(
char *name,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr,
int type
)
{
int rc, b, f, match;
LDAPMessage *e, *res;
struct timeval timeout;
char *dn;
char filter[1024];
char realfilter[1024];
char **mail, **onvacation = NULL, **uid = NULL;
/*
* Look up the name in X.500, add the appropriate addresses found
* to the to list, or to the err list in case of error. Groups are
* handled by the do_group routine, individuals are handled here.
* When looking up name, we follow the bases hierarchy, looking
* in base[0] first, then base[1], etc. For each base, there is
* a set of search filters to try, in order. If something goes
* wrong here trying to contact X.500, we exit with EX_TEMPFAIL.
* If the b_rdnpref flag is set, then we give preference to entries
* that matched name because it's their rdn, otherwise not.
*/
timeout.tv_sec = MAIL500_TIMEOUT;
timeout.tv_usec = 0;
for ( b = 0, match = 0; !match && base[b].b_dn != NULL; b++ ) {
if ( ! (base[b].b_search & type) ) {
continue;
}
for ( f = 0; base[b].b_filter[f] != NULL; f++ ) {
char *format, *p, *s, *d;
char *argv[3];
int argc;
for ( argc = 0; argc < 3; argc++ ) {
argv[argc] = NULL;
}
format = strdup( base[b].b_filter[f] );
for ( argc = 0, p = format; *p; p++ ) {
if ( *p == '%' ) {
switch ( *++p ) {
case 's': /* %s is the name */
argv[argc] = name;
break;
case 'h': /* %h is the host */
*p = 's';
argv[argc] = host;
break;
default:
syslog( LOG_ALERT,
"unknown format %c", *p );
break;
}
argc++;
}
}
/* three names ought to do... */
sprintf( filter, format, argv[0], argv[1], argv[2] );
free( format );
for ( s = filter, d = realfilter; *s; s++, d++ ) {
if ( *s == '*' ) {
*d++ = '\\';
}
*d = *s;
}
*d = '\0';
res = NULL;
rc = ldap_search_st( ld, base[b].b_dn,
LDAP_SCOPE_SUBTREE, realfilter, attrs, 0, &timeout,
&res );
/* some other trouble - try again later */
if ( rc != LDAP_SUCCESS &&
rc != LDAP_SIZELIMIT_EXCEEDED ) {
syslog( LOG_ALERT, "return 0x%x from X.500",
rc );
unbind_and_exit( EX_TEMPFAIL );
}
if ( (match = ldap_count_entries( ld, res )) != 0 )
break;
ldap_msgfree( res );
}
if ( match )
break;
}
/* trouble - try again later */
if ( match == -1 ) {
syslog( LOG_ALERT, "error parsing result from X.500" );
unbind_and_exit( EX_TEMPFAIL );
}
/* no matches - bounce with user unknown */
if ( match == 0 ) {
if ( type == USER ) {
add_error( err, nerr, E_USERUNKNOWN, name, NULLMSG );
} else {
add_error( err, nerr, E_GROUPUNKNOWN, name, NULLMSG );
}
return;
}
/* more than one match - bounce with ambiguous user? */
if ( match > 1 ) {
LDAPMessage *next, *tmpres = NULL;
char *dn;
char **xdn;
/* not giving rdn preference - bounce with ambiguous user */
if ( base[b].b_rdnpref == 0 ) {
add_error( err, nerr, E_AMBIGUOUS, name, res );
return;
}
/*
* giving rdn preference - see if any entries were matched
* because of their rdn. If so, collect them to deal with
* later (== 1 we deliver, > 1 we bounce).
*/
for ( e = ldap_first_entry( ld, res ); e != NULL; e = next ) {
next = ldap_next_entry( ld, e );
dn = ldap_get_dn( ld, e );
xdn = ldap_explode_dn( dn, 1 );
/* XXX bad, but how else can we do it? XXX */
if ( strcasecmp( xdn[0], name ) == 0 ) {
ldap_delete_result_entry( &res, e );
ldap_add_result_entry( &tmpres, e );
}
ldap_value_free( xdn );
free( dn );
}
/* nothing matched by rdn - go ahead and bounce */
if ( tmpres == NULL ) {
add_error( err, nerr, E_AMBIGUOUS, name, res );
return;
/* more than one matched by rdn - bounce with rdn matches */
} else if ( (match = ldap_count_entries( ld, tmpres )) > 1 ) {
add_error( err, nerr, E_AMBIGUOUS, name, tmpres );
return;
/* trouble... */
} else if ( match < 0 ) {
syslog( LOG_ALERT, "error parsing result from X.500" );
unbind_and_exit( EX_TEMPFAIL );
}
/* otherwise one matched by rdn - send to it */
ldap_msgfree( res );
res = tmpres;
}
/*
* if we get this far, it means that we found a single match for
* name. for a user, we deliver to the mail attribute or bounce
* with address and phone if no mail attr. for a group, we
* deliver to all members or bounce to rfc822ErrorsTo if no members.
*/
/* trouble */
if ( (e = ldap_first_entry( ld, res )) == NULL ) {
syslog( LOG_ALERT, "error parsing entry from X.500" );
unbind_and_exit( EX_TEMPFAIL );
}
dn = ldap_get_dn( ld, e );
if ( type == GROUP_ERRORS ) {
/* sent to group-errors - resend to [rfc822]ErrorsTo attr */
do_group_errors( e, dn, to, nto, err, nerr );
} else if ( type == GROUP_REQUEST ) {
/* sent to group-request - resend to [rfc822]RequestsTo attr */
do_group_request( e, dn, to, nto, err, nerr );
} else if ( type == GROUP_MEMBERS ) {
/* sent to group-members - expand */
do_group_members( e, dn, to, nto, togroups, ngroups, err,
nerr );
} else if ( type == GROUP_OWNER ) {
/* sent to group-owner - resend to owner attr */
do_group_owner( e, dn, to, nto, err, nerr );
} else if ( isgroup( e ) ) {
/*
* sent to group - resend from [rfc822]ErrorsTo if it's there,
* otherwise, expand the group
*/
do_group( e, dn, to, nto, togroups, ngroups, err, nerr );
ldap_msgfree( res );
} else {
/*
* sent to user - mail attribute => add it to the to list,
* otherwise bounce
*/
if ( (mail = ldap_get_values( ld, e, "mail" )) != NULL ) {
char buf[1024];
char *h;
int i, j;
/* try to detect simple mail loops */
sprintf( buf, "%s@%s", name, host );
for ( i = 0; mail[i] != NULL; i++ ) {
/*
* address is the same as the one we're
* sending to - mail loop. syslog the
* problem, bounce a message back to the
* sender (who else?), and delete the bogus
* addr from the list.
*/
if ( (h = strchr( mail[i], '@' )) != NULL ) {
h++;
if ( strcasecmp( h, host ) == 0 ) {
syslog( LOG_ALERT,
"potential loop detected (%s)",
mail[i] );
}
}
if ( mailcmp( buf, mail[i] ) == 0 ) {
syslog( LOG_ALERT,
"loop detected (%s)", mail[i] );
/* remove the bogus address */
for ( j = i; mail[j] != NULL; j++ ) {
mail[j] = mail[j+1];
}
}
}
if ( mail[0] != NULL ) {
add_to( to, nto, mail );
} else {
add_error( err, nerr, E_NOEMAIL, name, res );
}
ldap_value_free( mail );
} else {
add_error( err, nerr, E_NOEMAIL, name, res );
}
/*
* If the user is on vacation, send a copy of the mail to
* the vacation server. The address is constructed from
* the vacationhost (set in a command line argument) and
* the uid (XXX this should be more general XXX).
*/
if ( vacationhost != NULL && (onvacation = ldap_get_values( ld,
e, "onVacation" )) != NULL && strcasecmp( onvacation[0],
"TRUE" ) == 0 ) {
char buf[1024];
char *vaddr[2];
if ( (uid = ldap_get_values( ld, e, "uid" )) != NULL ) {
sprintf( buf, "%s@%s", uid[0], vacationhost );
vaddr[0] = buf;
vaddr[1] = NULL;
add_to( to, nto, vaddr );
} else {
syslog( LOG_ALERT,
"user without a uid on vacation (%s)",
name );
}
}
}
if ( onvacation != NULL ) {
ldap_value_free( onvacation );
}
if ( uid != NULL ) {
ldap_value_free( uid );
}
free( dn );
}
static int
do_group(
LDAPMessage *e,
char *dn,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr
)
{
int i;
char **moderator;
/*
* If this group has an rfc822ErrorsTo attribute, we need to
* arrange for errors involving this group to go there, not
* to the sender. Since sendmail only has the concept of a
* single sender, we arrange for errors to go to groupname-errors,
* which we then handle specially when (if) it comes back to us
* by expanding to all the rfc822ErrorsTo addresses. If it has no
* rfc822ErrorsTo attribute, we call do_group_members() to expand
* the group.
*/
if ( group_loop( dn ) ) {
return( -1 );
}
/*
* check for moderated groups - if the group has a moderator
* attribute, we check to see if the from address is one of
* the moderator values. if so, continue on. if not, arrange
* to send the mail to the moderator(s). need to do this before
* we change the from below.
*/
if ( (moderator = ldap_get_values( ld, e, "moderator" )) != NULL ) {
/* check if it came from any of the group's moderators */
for ( i = 0; moderator[i] != NULL; i++ ) {
if ( strcasecmp( moderator[i], mailfrom ) == 0 )
break;
}
/* not from the moderator? */
if ( moderator[i] == NULL ) {
add_to( to, nto, moderator );
ldap_value_free( moderator );
return( 0 );
}
/* else from the moderator - fall through and deliver it */
}
if (strcmp(MAIL500_BOUNCEFROM, mailfrom) != 0 &&
has_attributes( e, "rfc822ErrorsTo", "errorsTo" ) ) {
add_group( dn, togroups, ngroups );
return( 0 );
}
do_group_members( e, dn, to, nto, togroups, ngroups, err, nerr );
return( 0 );
}
/* ARGSUSED */
static void
do_group_members(
LDAPMessage *e,
char *dn,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr
)
{
int i, rc, anymembers;
char *ndn;
char **mail, **member, **joinable, **suppress;
char filter[1024];
LDAPMessage *ee, *res;
struct timeval timeout;
int opt;
/*
* if all has gone according to plan, we've already arranged for
* errors to go to the [rfc822]ErrorsTo attributes (if they exist),
* so all we have to do here is arrange to send to the
* rfc822Mailbox attribute, the member attribute, and anyone who
* has joined the group by setting memberOfGroup equal to the
* group dn.
*/
/* add members in the group itself - mail attribute */
anymembers = 0;
if ( (mail = ldap_get_values( ld, e, "mail" )) != NULL ) {
anymembers = 1;
add_to( to, nto, mail );
ldap_value_free( mail );
}
/* add members in the group itself - member attribute */
if ( (member = ldap_get_values( ld, e, "member" )) != NULL ) {
suppress = ldap_get_values( ld, e, "suppressNoEmailError" );
anymembers = 1;
for ( i = 0; member[i] != NULL; i++ ) {
if ( strcasecmp( dn, member[i] ) == 0 ) {
syslog( LOG_ALERT, "group (%s) contains itself",
dn );
continue;
}
add_member( dn, member[i], to, nto, togroups,
ngroups, err, nerr, suppress );
}
if ( suppress ) {
ldap_value_free( suppress );
}
ldap_value_free( member );
}
/* add members who have joined by setting memberOfGroup */
if ( (joinable = ldap_get_values( ld, e, "joinable" )) != NULL ) {
if ( strcasecmp( joinable[0], "FALSE" ) == 0 ) {
if ( ! anymembers ) {
add_error( err, nerr, E_NOMEMBERS, dn,
NULLMSG );
}
ldap_value_free( joinable );
return;
}
ldap_value_free( joinable );
sprintf( filter, "(memberOfGroup=%s)", dn );
timeout.tv_sec = MAIL500_TIMEOUT;
timeout.tv_usec = 0;
/* for each subtree to look in... */
opt = MAIL500_MAXAMBIGUOUS;
ldap_set_option(ld, LDAP_OPT_SIZELIMIT, &opt);
for ( i = 0; base[i].b_dn != NULL; i++ ) {
/* find entries that have joined this group... */
rc = ldap_search_st( ld, base[i].b_dn,
LDAP_SCOPE_SUBTREE, filter, attrs, 0, &timeout,
&res );
if ( rc == LDAP_SIZELIMIT_EXCEEDED ||
rc == LDAP_TIMELIMIT_EXCEEDED ) {
syslog( LOG_ALERT,
"group search limit exceeded %d", rc );
unbind_and_exit( EX_TEMPFAIL );
}
if ( rc != LDAP_SUCCESS ) {
syslog( LOG_ALERT, "group search return 0x%x",
rc );
unbind_and_exit( EX_TEMPFAIL );
}
/* for each entry that has joined... */
for ( ee = ldap_first_entry( ld, res ); ee != NULL;
ee = ldap_next_entry( ld, ee ) ) {
anymembers = 1;
if ( isgroup( ee ) ) {
ndn = ldap_get_dn( ld, ee );
if ( do_group( e, ndn, to, nto,
togroups, ngroups, err, nerr )
== -1 ) {
syslog( LOG_ALERT,
"group loop (%s) (%s)",
dn, ndn );
}
free( ndn );
continue;
}
/* add them to the to list */
if ( (mail = ldap_get_values( ld, ee, "mail" ))
!= NULL ) {
add_to( to, nto, mail );
ldap_value_free( mail );
/* else generate a bounce */
} else {
ndn = ldap_get_dn( ld, ee );
add_error( err, nerr,
E_JOINMEMBERNOEMAIL, ndn, NULLMSG );
free( ndn );
}
}
ldap_msgfree( res );
}
opt = MAIL500_MAXAMBIGUOUS;
ldap_set_option(ld, LDAP_OPT_SIZELIMIT, &opt);
}
if ( ! anymembers ) {
add_error( err, nerr, E_NOMEMBERS, dn, NULLMSG );
}
}
static void
add_member(
char *gdn,
char *dn,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr,
char **suppress
)
{
char *ndn;
char **mail;
int rc;
LDAPMessage *res, *e;
struct timeval timeout;
timeout.tv_sec = MAIL500_TIMEOUT;
timeout.tv_usec = 0;
if ( (rc = ldap_search_st( ld, dn, LDAP_SCOPE_BASE, "(objectclass=*)",
attrs, 0, &timeout, &res )) != LDAP_SUCCESS ) {
if ( rc == LDAP_NO_SUCH_OBJECT ) {
add_error( err, nerr, E_BADMEMBER, dn, NULLMSG );
return;
} else {
syslog( LOG_ALERT, "member search return 0x%x", rc );
unbind_and_exit( EX_TEMPFAIL );
}
}
if ( (e = ldap_first_entry( ld, res )) == NULL ) {
syslog( LOG_ALERT, "member search error parsing entry" );
unbind_and_exit( EX_TEMPFAIL );
}
ndn = ldap_get_dn( ld, e );
/* allow groups within groups */
if ( isgroup( e ) ) {
if ( do_group( e, ndn, to, nto, togroups, ngroups, err, nerr )
== -1 ) {
syslog( LOG_ALERT, "group loop (%s) (%s)", gdn, ndn );
}
free( ndn );
return;
}
/* send to the member's mail attribute */
if ( (mail = ldap_get_values( ld, e, "mail" )) != NULL ) {
add_to( to, nto, mail );
ldap_value_free( mail );
/* else generate a bounce */
} else {
if ( suppress == NULL || strcasecmp( suppress[0], "FALSE" )
== 0 ) {
add_error( err, nerr, E_MEMBERNOEMAIL, ndn, NULLMSG );
}
}
free( ndn );
}
static void
do_group_request(
LDAPMessage *e,
char *dn,
char ***to,
int *nto,
Error **err,
int *nerr
)
{
char **requeststo;
if ( (requeststo = get_attributes_mail_dn( e, "rfc822RequestsTo",
"requestsTo" )) != NULL ) {
add_to( to, nto, requeststo );
ldap_value_free( requeststo );
} else {
add_error( err, nerr, E_NOREQUEST, dn, NULLMSG );
}
}
static void
do_group_errors(
LDAPMessage *e,
char *dn,
char ***to,
int *nto,
Error **err,
int *nerr
)
{
char **errorsto;
if ( (errorsto = get_attributes_mail_dn( e, "rfc822ErrorsTo",
"errorsTo" )) != NULL ) {
add_to( to, nto, errorsto );
ldap_value_free( errorsto );
} else {
add_error( err, nerr, E_NOERRORS, dn, NULLMSG );
}
}
static void
do_group_owner(
LDAPMessage *e,
char *dn,
char ***to,
int *nto,
Error **err,
int *nerr
)
{
char **owner;
if ( (owner = get_attributes_mail_dn( e, "", "owner" )) != NULL ) {
add_to( to, nto, owner );
ldap_value_free( owner );
} else {
add_error( err, nerr, E_NOOWNER, dn, NULLMSG );
}
}
static void
send_message( char **to )
{
int pid;
#ifndef HAVE_WAITPID
WAITSTATUSTYPE status;
#endif
if ( debug ) {
char buf[1024];
int i;
strcpy( buf, to[0] );
for ( i = 1; to[i] != NULL; i++ ) {
strcat( buf, " " );
strcat( buf, to[i] );
}
syslog( LOG_ALERT, "send_message execing sendmail: (%s)", buf );
}
/* parent */
if ( (pid = fork()) != 0 ) {
#ifdef HAVE_WAITPID
waitpid( pid, (int *) NULL, 0 );
#else
wait4( pid, &status, WAIT_FLAGS, 0 );
#endif
/* child */
} else {
/* to includes sendmailargs */
execv( MAIL500_SENDMAIL, to );
syslog( LOG_ALERT, "execv failed" );
exit( EX_TEMPFAIL );
}
}
static void
send_group( Group *group, int ngroup )
{
int i, pid;
char **argv;
int argc;
char *iargv[7];
#ifndef HAVE_WAITPID
WAITSTATUSTYPE status;
#endif
for ( i = 0; i < ngroup; i++ ) {
(void) rewind( stdin );
iargv[0] = MAIL500_SENDMAIL;
iargv[1] = "-f";
iargv[2] = group[i].g_errorsto;
iargv[3] = "-oMrX.500";
iargv[4] = "-odi";
iargv[5] = "-oi";
iargv[6] = NULL;
argv = NULL;
argc = 0;
add_to( &argv, &argc, iargv );
add_to( &argv, &argc, group[i].g_members );
if ( debug ) {
char buf[1024];
int i;
strcpy( buf, argv[0] );
for ( i = 1; i < argc; i++ ) {
strcat( buf, " " );
strcat( buf, argv[i] );
}
syslog( LOG_ALERT, "execing sendmail: (%s)", buf );
}
/* parent */
if ( (pid = fork()) != 0 ) {
#ifdef HAVE_WAITPID
waitpid( pid, (int *) NULL, 0 );
#else
wait4( pid, &status, WAIT_FLAGS, 0 );
#endif
/* child */
} else {
execv( MAIL500_SENDMAIL, argv );
syslog( LOG_ALERT, "execv failed" );
exit( EX_TEMPFAIL );
}
}
}
static void
send_errors( Error *err, int nerr )
{
int pid, i, namelen;
FILE *fp;
int fd[2];
char *argv[8];
char buf[1024];
#ifndef HAVE_WAITPID
WAITSTATUSTYPE status;
#endif
if ( strcmp( MAIL500_BOUNCEFROM, mailfrom ) == 0 ) {
mailfrom = errorsfrom;
}
argv[0] = MAIL500_SENDMAIL;
argv[1] = "-oMrX.500";
argv[2] = "-odi";
argv[3] = "-oi";
argv[4] = "-f";
argv[5] = MAIL500_BOUNCEFROM;
argv[6] = mailfrom;
argv[7] = NULL;
if ( debug ) {
int i;
strcpy( buf, argv[0] );
for ( i = 1; argv[i] != NULL; i++ ) {
strcat( buf, " " );
strcat( buf, argv[i] );
}
syslog( LOG_ALERT, "execing sendmail: (%s)", buf );
}
if ( pipe( fd ) == -1 ) {
syslog( LOG_ALERT, "cannot create pipe" );
exit( EX_TEMPFAIL );
}
if ( (pid = fork()) != 0 ) {
if ( (fp = fdopen( fd[1], "w" )) == NULL ) {
syslog( LOG_ALERT, "cannot fdopen pipe" );
exit( EX_TEMPFAIL );
}
fprintf( fp, "To: %s\n", mailfrom );
fprintf( fp, "From: %s\n", errorsfrom );
fprintf( fp, "Subject: undeliverable mail\n" );
fprintf( fp, "\n" );
fprintf( fp, "The following errors occurred when trying to deliver the attached mail:\n" );
for ( i = 0; i < nerr; i++ ) {
namelen = strlen( err[i].e_addr );
fprintf( fp, "\n" );
switch ( err[i].e_code ) {
case E_USERUNKNOWN:
fprintf( fp, "%s: User unknown\n", err[i].e_addr );
break;
case E_GROUPUNKNOWN:
fprintf( fp, "%s: Group unknown\n", err[i].e_addr );
break;
case E_BADMEMBER:
fprintf( fp, "%s: Group member does not exist\n",
err[i].e_addr );
fprintf( fp, "This could be because the distinguished name of the person has changed\n" );
fprintf( fp, "If this is the case, the problem can be solved by removing and\n" );
fprintf( fp, "then re-adding the person to the group.\n" );
break;
case E_NOREQUEST:
fprintf( fp, "%s: Group exists but has no request address\n",
err[i].e_addr );
break;
case E_NOERRORS:
fprintf( fp, "%s: Group exists but has no errors-to address\n",
err[i].e_addr );
break;
case E_NOOWNER:
fprintf( fp, "%s: Group exists but has no owner\n",
err[i].e_addr );
break;
case E_AMBIGUOUS:
do_ambiguous( fp, &err[i], namelen );
break;
case E_NOEMAIL:
do_noemail( fp, &err[i], namelen );
break;
case E_MEMBERNOEMAIL:
fprintf( fp, "%s: Group member exists but does not have an email address\n",
err[i].e_addr );
break;
case E_JOINMEMBERNOEMAIL:
fprintf( fp, "%s: User has joined group but does not have an email address\n",
err[i].e_addr );
break;
case E_LOOP:
fprintf( fp, "%s: User has created a mail loop by adding address %s to their X.500 entry\n",
err[i].e_addr, err[i].e_loop );
break;
case E_NOMEMBERS:
fprintf( fp, "%s: Group has no members\n",
err[i].e_addr );
break;
default:
syslog( LOG_ALERT, "unknown error %d", err[i].e_code );
unbind_and_exit( EX_TEMPFAIL );
break;
}
}
fprintf( fp, "\n------- The original message sent:\n\n" );
while ( fgets( buf, sizeof(buf), stdin ) != NULL ) {
fputs( buf, fp );
}
fclose( fp );
#ifdef HAVE_WAITPID
waitpid( pid, (int *) NULL, 0 );
#else
wait4( pid, &status, WAIT_FLAGS, 0 );
#endif
} else {
dup2( fd[0], 0 );
execv( MAIL500_SENDMAIL, argv );
syslog( LOG_ALERT, "execv failed" );
exit( EX_TEMPFAIL );
}
}
static void
do_noemail( FILE *fp, Error *err, int namelen )
{
int i, last;
char *dn, *rdn;
char **ufn, **vals;
fprintf(fp, "%s: User has no email address registered.\n",
err->e_addr );
fprintf( fp, "%*s Name, title, postal address and phone for '%s':\n\n",
namelen, " ", err->e_addr );
/* name */
dn = ldap_get_dn( ld, err->e_msg );
ufn = ldap_explode_dn( dn, 1 );
rdn = strdup( ufn[0] );
if ( strcasecmp( rdn, err->e_addr ) == 0 ) {
if ( (vals = ldap_get_values( ld, err->e_msg, "cn" ))
!= NULL ) {
for ( i = 0; vals[i]; i++ ) {
last = strlen( vals[i] ) - 1;
if ( isdigit((unsigned char) vals[i][last]) ) {
rdn = strdup( vals[i] );
break;
}
}
ldap_value_free( vals );
}
}
fprintf( fp, "%*s %s\n", namelen, " ", rdn );
free( dn );
free( rdn );
ldap_value_free( ufn );
/* titles or descriptions */
if ( (vals = ldap_get_values( ld, err->e_msg, "title" )) == NULL &&
(vals = ldap_get_values( ld, err->e_msg, "description" ))
== NULL ) {
fprintf( fp, "%*s No title or description registered\n",
namelen, " " );
} else {
for ( i = 0; vals[i] != NULL; i++ ) {
fprintf( fp, "%*s %s\n", namelen, " ", vals[i] );
}
ldap_value_free( vals );
}
/* postal address */
if ( (vals = ldap_get_values( ld, err->e_msg, "postalAddress" ))
== NULL ) {
fprintf( fp, "%*s No postal address registered\n", namelen,
" " );
} else {
fprintf( fp, "%*s ", namelen, " " );
for ( i = 0; vals[0][i] != '\0'; i++ ) {
if ( vals[0][i] == '$' ) {
fprintf( fp, "\n%*s ", namelen, " " );
while ( isspace((unsigned char) vals[0][i+1]) )
i++;
} else {
fprintf( fp, "%c", vals[0][i] );
}
}
fprintf( fp, "\n" );
ldap_value_free( vals );
}
/* telephone number */
if ( (vals = ldap_get_values( ld, err->e_msg, "telephoneNumber" ))
== NULL ) {
fprintf( fp, "%*s No phone number registered\n", namelen,
" " );
} else {
for ( i = 0; vals[i] != NULL; i++ ) {
fprintf( fp, "%*s %s\n", namelen, " ", vals[i] );
}
ldap_value_free( vals );
}
}
/* ARGSUSED */
static void
do_ambiguous( FILE *fp, Error *err, int namelen )
{
int i, last;
char *dn, *rdn;
char **ufn, **vals;
LDAPMessage *e;
i = ldap_result2error( ld, err->e_msg, 0 );
fprintf( fp, "%s: Ambiguous user. %s%d matches found:\n\n",
err->e_addr, i == LDAP_SIZELIMIT_EXCEEDED ? "First " : "",
ldap_count_entries( ld, err->e_msg ) );
for ( e = ldap_first_entry( ld, err->e_msg ); e != NULL;
e = ldap_next_entry( ld, e ) ) {
dn = ldap_get_dn( ld, e );
ufn = ldap_explode_dn( dn, 1 );
rdn = strdup( ufn[0] );
if ( strcasecmp( rdn, err->e_addr ) == 0 ) {
if ( (vals = ldap_get_values( ld, e, "cn" )) != NULL ) {
for ( i = 0; vals[i]; i++ ) {
last = strlen( vals[i] ) - 1;
if (isdigit((unsigned char) vals[i][last])) {
rdn = strdup( vals[i] );
break;
}
}
ldap_value_free( vals );
}
}
if ( isgroup( e ) ) {
vals = ldap_get_values( ld, e, "description" );
} else {
vals = ldap_get_values( ld, e, "title" );
}
fprintf( fp, " %-20s %s\n", rdn, vals ? vals[0] : "" );
for ( i = 1; vals && vals[i] != NULL; i++ ) {
fprintf( fp, " %s\n", vals[i] );
}
free( dn );
free( rdn );
ldap_value_free( ufn );
if ( vals != NULL )
ldap_value_free( vals );
}
}
static int
count_values( char **list )
{
int i;
for ( i = 0; list && list[i] != NULL; i++ )
; /* NULL */
return( i );
}
static void
add_to( char ***list, int *nlist, char **new )
{
int i, nnew, oldnlist;
nnew = count_values( new );
oldnlist = *nlist;
if ( *list == NULL || *nlist == 0 ) {
*list = (char **) malloc( (nnew + 1) * sizeof(char *) );
*nlist = nnew;
} else {
*list = (char **) realloc( *list, *nlist * sizeof(char *) +
nnew * sizeof(char *) + sizeof(char *) );
*nlist += nnew;
}
for ( i = 0; i < nnew; i++ )
(*list)[i + oldnlist] = strdup( new[i] );
(*list)[*nlist] = NULL;
}
static int
isgroup( LDAPMessage *e )
{
int i;
char **oclist;
oclist = ldap_get_values( ld, e, "objectClass" );
for ( i = 0; oclist[i] != NULL; i++ ) {
if ( strcasecmp( oclist[i], "rfc822MailGroup" ) == 0 ) {
ldap_value_free( oclist );
return( 1 );
}
}
ldap_value_free( oclist );
return( 0 );
}
static void
add_error( Error **err, int *nerr, int code, char *addr, LDAPMessage *msg )
{
if ( *nerr == 0 ) {
*err = (Error *) malloc( sizeof(Error) );
} else {
*err = (Error *) realloc( *err, (*nerr + 1) * sizeof(Error) );
}
(*err)[*nerr].e_code = code;
(*err)[*nerr].e_addr = strdup( addr );
(*err)[*nerr].e_msg = msg;
(*nerr)++;
}
static void
add_group( char *dn, Group **list, int *nlist )
{
int i, namelen;
char **ufn;
for ( i = 0; i < *nlist; i++ ) {
if ( strcmp( dn, (*list)[i].g_dn ) == 0 ) {
syslog( LOG_ALERT, "group loop 2 detected (%s)", dn );
return;
}
}
ufn = ldap_explode_dn( dn, 1 );
namelen = strlen( ufn[0] );
if ( *nlist == 0 ) {
*list = (Group *) malloc( sizeof(Group) );
} else {
*list = (Group *) realloc( *list, (*nlist + 1) *
sizeof(Group) );
}
/* send errors to groupname-errors@host */
(*list)[*nlist].g_errorsto = (char *) malloc( namelen + sizeof(ERRORS)
+ hostlen + 2 );
sprintf( (*list)[*nlist].g_errorsto, "%s-%s@%s", ufn[0], ERRORS, host );
(void) canonical( (*list)[*nlist].g_errorsto );
/* send to groupname-members@host - make it a list for send_group */
(*list)[*nlist].g_members = (char **) malloc( 2 * sizeof(char *) );
(*list)[*nlist].g_members[0] = (char *) malloc( namelen +
sizeof(MEMBERS) + hostlen + 2 );
sprintf( (*list)[*nlist].g_members[0], "%s-%s@%s", ufn[0], MEMBERS,
host );
(void) canonical( (*list)[*nlist].g_members[0] );
(*list)[*nlist].g_members[1] = NULL;
/* save the group's dn so we can check for loops above */
(*list)[*nlist].g_dn = strdup( dn );
(*nlist)++;
ldap_value_free( ufn );
}
static void
unbind_and_exit( int rc )
{
int i;
if ( (i = ldap_unbind( ld )) != LDAP_SUCCESS )
syslog( LOG_ALERT, "ldap_unbind failed %d\n", i );
exit( rc );
}
static char *
canonical( char *s )
{
char *saves = s;
for ( ; *s != '\0'; s++ ) {
if ( *s == ' ' )
*s = '.';
}
return( saves );
}
static int
group_loop( char *dn )
{
int i;
static char **groups;
static int ngroups;
for ( i = 0; i < ngroups; i++ ) {
if ( strcmp( dn, groups[i] ) == 0 )
return( 1 );
}
if ( ngroups == 0 )
groups = (char **) malloc( sizeof(char *) );
else
groups = (char **) realloc( groups,
(ngroups + 1) * sizeof(char *) );
groups[ngroups++] = strdup( dn );
return( 0 );
}
static int
has_attributes( LDAPMessage *e, char *attr1, char *attr2 )
{
char **attr;
if ( (attr = ldap_get_values( ld, e, attr1 )) != NULL ) {
ldap_value_free( attr );
return( 1 );
}
if ( (attr = ldap_get_values( ld, e, attr2 )) != NULL ) {
ldap_value_free( attr );
return( 1 );
}
return( 0 );
}
static char **
get_attributes_mail_dn(
LDAPMessage *e,
char *attr1,
char *attr2 /* this one is dn-valued */
)
{
LDAPMessage *ee, *res;
char **vals, **dnlist, **mail, **grname;
char *dn;
int nto = 0, i, rc;
struct timeval timeout;
dn = ldap_get_dn( ld, e );
vals = ldap_get_values( ld, e, attr1 );
for ( nto = 0; vals != NULL && vals[nto] != NULL; nto++ )
; /* NULL */
if ( (dnlist = ldap_get_values( ld, e, attr2 )) != NULL ) {
timeout.tv_sec = MAIL500_TIMEOUT;
timeout.tv_usec = 0;
for ( i = 0; dnlist[i] != NULL; i++ ) {
if ( (rc = ldap_search_st( ld, dnlist[i],
LDAP_SCOPE_BASE, "(objectclass=*)", attrs, 0,
&timeout, &res )) != LDAP_SUCCESS ) {
if ( rc != LDAP_NO_SUCH_OBJECT ) {
unbind_and_exit( EX_TEMPFAIL );
}
syslog( LOG_ALERT, "bad (%s) dn (%s)", attr2,
dnlist[i] );
continue;
}
if ( (ee = ldap_first_entry( ld, res )) == NULL ) {
syslog( LOG_ALERT, "error parsing x500 entry" );
continue;
}
if ( isgroup(ee) ) {
char *graddr[2];
grname = ldap_explode_dn( dnlist[i], 1 );
/* groupname + host + @ + null */
graddr[0] = (char *) malloc( strlen( grname[0] )
+ strlen( host ) + 2 );
graddr[1] = NULL;
sprintf( graddr[0], "%s@%s", grname[0], host);
(void) canonical( graddr[0] );
add_to( &vals, &nto, graddr );
free( graddr[0] );
ldap_value_free( grname );
} else if ( (mail = ldap_get_values( ld, ee, "mail" ))
!= NULL ) {
add_to( &vals, &nto, mail );
ldap_value_free( mail );
}
ldap_msgfree( res );
}
}
return( vals );
}
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