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openldap/clients/mail500/main.c
Julio Sánchez Fernández 42d53c49f0 Initial version of new mail500.
1999-06-30 13:54:32 +00:00

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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.
*
* Copyright 1998,1999 The OpenLDAP Foundation
* COPYING RESTRICTIONS APPLY. See COPYRIGHT File in top level directory
* of this package for details.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/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 "ldap_defaults.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 = MAIL500_BOUNCEFROM;
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 e_union_u {
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;
int g_nmembers;
} Group;
typedef struct baseinfo {
char *b_url;
int b_m_entries;
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 */
} Base;
/*
* We should limit the search to objectclass=mailRecipient or
* objectclass=mailGroup.
*/
/*
Base base[] = {
{"dc=StlInter, dc=Net",
0, 0xff,
{"mail=%s", "mailAlternateAddress=%s", NULL}},
{NULL}
};
*/
Base **base = NULL;
char *sendmailargs[] = { MAIL500_SENDMAIL, "-oMrLDAP", "-odi", "-oi", "-f", NULL, NULL };
typedef struct attr_semantics {
char *as_name;
int as_m_valued; /* Is multivalued? */
int as_final; /* If true, no further expansion is tried. */
int as_syntax; /* How to interpret values */
int as_m_entries; /* Can resolve to several entries? */
int as_kind; /* Recipient, sender, etc. */
char *as_param; /* Extra info for filters and things alike */
} AttrSemantics;
#define AS_SYNTAX_UNKNOWN 0 /* Unqualified mailbox name */
#define AS_SYNTAX_NATIVE_MB 1 /* Unqualified mailbox name */
#define AS_SYNTAX_RFC822 2 /* RFC822 mail address */
#define AS_SYNTAX_HOST 3
#define AS_SYNTAX_DN 4 /* A directory entry */
#define AS_SYNTAX_RFC822_EXT 5
#define AS_SYNTAX_URL 6 /* mailto: or ldap: URL */
#define AS_SYNTAX_BOOL_FILTER 7 /* For joinable, filter in as_param */
#define AS_KIND_UNKNOWN 0
#define AS_KIND_RECIPIENT 1
#define AS_KIND_ERRORS 2 /* For ErrorsTo and similar */
#define AS_KIND_REQUEST 3
#define AS_KIND_OWNER 4
#define AS_KIND_FORWARD_TO_HOST 5 /* Expand at some other host */
#define AS_KIND_ALLOWED_SENDER 6 /* Can send to group */
#define AS_KIND_MODERATOR 7
AttrSemantics **attr_semantics = NULL;
typedef struct subst {
char sub_char;
char *sub_value;
} Subst;
char **groupclasses = NULL;
char **def_attr = NULL;
static void load_config( char *filespec );
static void split_address( char *address, char **localpart, char **domainpart);
static int entry_engine( LDAPMessage *e, char *dn, char *address, char ***to, int *nto, Group **togroups, int *ngroups, Error **err, int *nerr, int type );
static void do_address( char *name, char ***to, int *nto, Group **togroups, int *ngroups, Error **err, int *nerr, int type );
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 int count_values( char **list );
static void add_to( char ***list, int *nlist, char **new );
static void add_single_to( char ***list, char *new );
static int isgroup( LDAPMessage *e );
static void add_error( Error **err, int *nerr, int code, char *addr, LDAPMessage *msg );
static void unbind_and_exit( int rc );
static void send_group( Group *group, int ngroup );
static int connect_to_x500( void );
int
main ( int argc, char **argv )
{
char *myname;
char **tolist;
Error *errlist;
Group *togroups;
int numto, ngroups, numerr, nargs;
int i, j;
char *conffile = NULL;
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:C:f:h:l:m:v:" )) != EOF ) {
switch( i ) {
case 'd': /* turn on debugging */
debug = atoi( optarg );
break;
case 'C': /* path to configuration file */
conffile = strdup( 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 ( conffile == NULL ) {
syslog( LOG_ALERT, "required argument -C not present" );
exit( EX_TEMPFAIL );
}
load_config( conffile );
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;
char *localpart, *domainpart;
char address[1024];
/* TBC: Make this processing optional */
/* for ( j = 0; argv[i][j] != '\0'; j++ ) { */
/* if ( argv[i][j] == '.' || argv[i][j] == '_' ) */
/* argv[i][j] = ' '; */
/* } */
type = USER;
split_address( argv[i], &localpart, &domainpart );
if ( (s = strrchr( localpart, '-' )) != 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';
}
}
if ( domainpart ) {
sprintf( address, "%s@%s", localpart, domainpart );
free( localpart );
free( domainpart );
} else {
sprintf( address, "%s@%s", localpart, domainpart );
free( localpart );
}
do_address( address, &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 char *
get_config_line( FILE *cf, int *lineno)
{
static char buf[2048];
int len;
int pos;
int room;
pos = 0;
room = sizeof( buf );
while ( fgets( &buf[pos], room, cf ) ) {
(*lineno)++;
if ( pos > 0 ) {
/* Delete whitespace at the beginning of new data */
if ( isspace( buf[pos] ) ) {
char *s, *d;
for ( s = buf+pos; isspace(*s); s++ )
;
for ( d = buf+pos; *s; s++, d++ ) {
*d = *s;
}
*d = *s;
}
}
len = strlen( buf );
if ( buf[len-1] != '\n' ) {
syslog( LOG_ALERT, "Definition too long at line %d",
*lineno );
exit( EX_TEMPFAIL );
}
if ( buf[0] == '#' )
continue;
if ( strspn( buf, " \t\n" ) == len )
continue;
if ( buf[len-2] == '\\' ) {
pos = len - 2;
room = sizeof(buf) - pos;
continue;
}
/* We have a real line, we will exit the loop */
buf[len-1] = '\0';
return( buf );
}
return( NULL );
}
static void
add_url ( char *url, int rdnpref, int typemask )
{
Base **list_temp;
int size;
Base *b;
b = calloc(1, sizeof(Base));
if ( !b ) {
syslog( LOG_ALERT, "Out of memory" );
exit( EX_TEMPFAIL );
}
b->b_url = strdup( url );
b->b_rdnpref = rdnpref;
b->b_search = typemask;
if ( base == NULL ) {
base = calloc(2, sizeof(LDAPURLDesc *));
if ( !base ) {
syslog( LOG_ALERT, "Out of memory" );
exit( EX_TEMPFAIL );
}
base[0] = b;
} else {
for ( size = 0; base[size]; size++ )
;
size += 2;
list_temp = realloc( base, size*sizeof(LDAPURLDesc *) );
if ( !list_temp ) {
syslog( LOG_ALERT, "Out of memory" );
exit( EX_TEMPFAIL );
}
base = list_temp;
base[size-2] = b;
base[size-1] = NULL;
}
}
static void
add_def_attr( char *s )
{
char *p, *q;
p = s;
while ( *p ) {
p += strspn( p, "\t," );
q = strpbrk( p, " \t," );
if ( q ) {
*q = '\0';
add_single_to( &def_attr, p );
} else {
add_single_to( &def_attr, p );
break;
}
p = q + 1;
}
}
static void
add_attr_semantics( char *s )
{
char *p, *q;
AttrSemantics *as;
as = calloc( 1, sizeof( AttrSemantics ) );
p = s;
while ( isspace ( *p ) )
p++;
q = p;
while ( !isspace ( *q ) && *q != '\0' )
q++;
*q = '\0';
as->as_name = strdup( p );
p = q + 1;
while ( *p ) {
while ( isspace ( *p ) )
p++;
q = p;
while ( !isspace ( *q ) && *q != '\0' )
q++;
*q = '\0';
if ( !strcasecmp( p, "multivalued" ) ) {
as->as_m_valued = 1;
} else if ( !strcasecmp( p, "multiple-entries" ) ) {
as->as_m_entries = 1;
} else if ( !strcasecmp( p, "final" ) ) {
as->as_final = 1;
} else if ( !strcasecmp( p, "local-native-mailbox" ) ) {
as->as_syntax = AS_SYNTAX_NATIVE_MB;
} else if ( !strcasecmp( p, "rfc822" ) ) {
as->as_syntax = AS_SYNTAX_RFC822;
} else if ( !strcasecmp( p, "rfc822-extended" ) ) {
as->as_syntax = AS_SYNTAX_RFC822_EXT;
} else if ( !strcasecmp( p, "dn" ) ) {
as->as_syntax = AS_SYNTAX_DN;
} else if ( !strcasecmp( p, "url" ) ) {
as->as_syntax = AS_SYNTAX_URL;
} else if ( !strncasecmp( p, "search-with-filter=", 19 ) ) {
as->as_syntax = AS_SYNTAX_BOOL_FILTER;
q = strchr( p, '=' );
if ( q ) {
p = q + 1;
while ( *q && !isspace( *q ) ) {
q++;
}
if ( *q ) {
*q = '\0';
as->as_param = strdup( p );
p = q + 1;
} else {
as->as_param = strdup( p );
p = q;
}
} else {
syslog( LOG_ALERT,
"Missing filter in %s", s );
exit( EX_TEMPFAIL );
}
} else if ( !strcasecmp( p, "host" ) ) {
as->as_kind = AS_SYNTAX_HOST;
} else if ( !strcasecmp( p, "forward-to-host" ) ) {
as->as_kind = AS_KIND_FORWARD_TO_HOST;
} else if ( !strcasecmp( p, "recipient" ) ) {
as->as_kind = AS_KIND_RECIPIENT;
} else if ( !strcasecmp( p, "errors" ) ) {
as->as_kind = AS_KIND_ERRORS;
} else if ( !strcasecmp( p, "request" ) ) {
as->as_kind = AS_KIND_REQUEST;
} else if ( !strcasecmp( p, "owner" ) ) {
as->as_kind = AS_KIND_OWNER;
} else {
syslog( LOG_ALERT,
"Unknown semantics word %s", p );
exit( EX_TEMPFAIL );
}
p = q + 1;
}
if ( attr_semantics == NULL ) {
attr_semantics = calloc(2, sizeof(AttrSemantics *));
if ( !attr_semantics ) {
syslog( LOG_ALERT, "Out of memory" );
exit( EX_TEMPFAIL );
}
attr_semantics[0] = as;
} else {
int size;
AttrSemantics **list_temp;
for ( size = 0; attr_semantics[size]; size++ )
;
size += 2;
list_temp = realloc( attr_semantics,
size*sizeof(AttrSemantics *) );
if ( !list_temp ) {
syslog( LOG_ALERT, "Out of memory" );
exit( EX_TEMPFAIL );
}
attr_semantics = list_temp;
attr_semantics[size-2] = as;
attr_semantics[size-1] = NULL;
}
}
static void
load_config( char *filespec )
{
FILE *cf;
char *line;
int lineno = 0;
char *p;
int rdnpref;
int typemask;
cf = fopen( filespec, "r" );
if ( !cf ) {
perror( "Opening config file" );
exit( EX_TEMPFAIL );
}
while ( ( line = get_config_line( cf,&lineno ) ) ) {
fprintf( stderr, "Read line %d:%s\n", lineno, line );
p = strpbrk( line, " \t" );
if ( !p ) {
syslog( LOG_ALERT,
"Missing space at line %d", lineno );
exit( EX_TEMPFAIL );
}
if ( !strncmp( line, "search", p-line ) ) {
p += strspn( p, " \t" );
/* TBC, get these */
rdnpref = 0;
typemask = 0xFF;
add_url( p, rdnpref, typemask );
} else if ( !strncmp(line, "attribute", p-line) ) {
p += strspn(p, " \t");
add_attr_semantics( p );
} else if ( !strncmp(line, "default-attributes", p-line) ) {
p += strspn(p, " \t");
add_def_attr( p );
} else if ( !strncmp(line, "group-classes", p-line) ) {
p += strspn(p, " \t");
add_single_to( &groupclasses, p );
} else {
syslog( LOG_ALERT,
"Unparseable config definition at line %d",
lineno );
exit( EX_TEMPFAIL );
}
}
fclose( cf );
}
static int
connect_to_x500( void )
{
int opt;
if ( (ld = ldap_init( ldaphost, 0 )) == NULL ) {
syslog( LOG_ALERT, "ldap_init failed" );
return( -1 );
}
/* TBC: Set this only when it makes sense
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 Group *
new_group( char *dn, Group **list, int *nlist )
{
int i;
Group *this_group;
for ( i = 0; i < *nlist; i++ ) {
if ( strcmp( dn, (*list)[i].g_dn ) == 0 ) {
syslog( LOG_ALERT, "group loop 2 detected (%s)", dn );
return NULL;
}
}
if ( *nlist == 0 ) {
*list = (Group *) malloc( sizeof(Group) );
} else {
*list = (Group *) realloc( *list, (*nlist + 1) *
sizeof(Group) );
}
this_group = *list;
(*list)[*nlist].g_errorsto = NULL;
(*list)[*nlist].g_members = NULL;
(*list)[*nlist].g_nmembers = 0;
/* save the group's dn so we can check for loops above */
(*list)[*nlist].g_dn = strdup( dn );
(*nlist)++;
return( this_group );
}
static void
split_address(
char *address,
char **localpart,
char **domainpart
)
{
char *p;
if ( ( p = strrchr( address, '@' ) ) == NULL ) {
*localpart = strdup( address );
*domainpart = NULL;
} else {
*localpart = malloc( p - address + 1 );
strncpy( *localpart, address, p - address );
(*localpart)[p - address] = '\0';
p++;
*domainpart = strdup( p );
}
}
static int
dn_search(
char **dnlist,
char *address,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr
)
{
int rc;
int i;
int resolved = 0;
LDAPMessage *res, *e;
struct timeval timeout;
timeout.tv_sec = MAIL500_TIMEOUT;
timeout.tv_usec = 0;
for ( i = 0; dnlist[i]; i++ ) {
if ( (rc = ldap_search_st( ld, dnlist[i], LDAP_SCOPE_BASE,
"(objectclass=*)", def_attr, 0,
&timeout, &res )) != LDAP_SUCCESS ) {
if ( rc == LDAP_NO_SUCH_OBJECT ) {
add_error( err, nerr, E_BADMEMBER, dnlist[i], NULL );
continue;
} else {
syslog( LOG_ALERT, "member search return 0x%x", rc );
unbind_and_exit( EX_TEMPFAIL );
}
} else {
if ( (e = ldap_first_entry( ld, res )) == NULL ) {
syslog( LOG_ALERT, "member search error parsing entry" );
unbind_and_exit( EX_TEMPFAIL );
}
if ( entry_engine( e, dnlist[i], address, to, nto,
togroups, ngroups, err, nerr,
USER | GROUP_MEMBERS ) ) {
resolved = 1;
}
}
}
return( resolved );
}
static int
search_ldap_url(
char *url,
Subst *substs,
char *address,
int rdnpref,
int multi_entry,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr,
int type
)
{
LDAPURLDesc *ludp;
char *p, *s, *d;
int i;
char filter[1024];
char realfilter[1024];
LDAPMessage *e, *res;
int rc;
char **attrlist;
struct timeval timeout;
int match;
int resolved = 0;
char *dn;
timeout.tv_sec = MAIL500_TIMEOUT;
timeout.tv_usec = 0;
rc = ldap_url_parse( url, &ludp );
if ( rc ) {
switch ( rc ) {
case LDAP_URL_ERR_NOTLDAP:
syslog( LOG_ALERT,
"Not an LDAP URL: %s", url );
break;
case LDAP_URL_ERR_NODN:
syslog( LOG_ALERT,
"Missing DN in URL: %s", url );
break;
case LDAP_URL_ERR_BADSCOPE:
syslog( LOG_ALERT,
"Scope string is invalid in URL: %s", url );
break;
case LDAP_URL_ERR_MEM:
syslog( LOG_ALERT,
"Out of memory parsing URL: %s", url );
break;
default:
syslog( LOG_ALERT,
"Unknown error %d parsing URL: %s",
rc, url );
break;
}
add_error( err, nerr, E_BADMEMBER,
url, NULL );
return 0;
}
if ( substs ) {
for ( s = ludp->lud_filter, d = filter; *s; s++,d++ ) {
if ( *s == '%' ) {
s++;
if ( *s == '%' ) {
*d = '%';
continue;
}
for ( i = 0; substs[i].sub_char != '\0';
i++ ) {
if ( *s == substs[i].sub_char ) {
for ( p = substs[i].sub_value;
*p; p++,d++ ) {
*d = *p;
}
d--;
break;
}
}
if ( substs[i].sub_char == '\0' ) {
syslog( LOG_ALERT,
"unknown format %c", *s );
}
} else {
*d = *s;
}
}
*d = *s;
} else {
strncpy( filter, ludp->lud_filter, sizeof( filter ) - 1 );
filter[ sizeof( filter ) - 1 ] = '\0';
}
for ( s = filter, d = realfilter; *s; s++, d++ ) {
if ( *s == '*' ) {
*d++ = '\\';
}
*d = *s;
}
*d = '\0';
if ( ludp->lud_attrs ) {
attrlist = ludp->lud_attrs;
} else {
attrlist = def_attr;
}
res = NULL;
/* TBC: we don't read the host, dammit */
rc = ldap_search_st( ld, ludp->lud_dn, ludp->lud_scope,
realfilter, attrlist, 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 );
}
match = ldap_count_entries( ld, res );
/* trouble - try again later */
if ( match == -1 ) {
syslog( LOG_ALERT, "error parsing result from X.500" );
unbind_and_exit( EX_TEMPFAIL );
}
if ( match == 1 || multi_entry ) {
for ( e = ldap_first_entry( ld, res ); e != NULL;
e = ldap_next_entry( ld, e ) ) {
dn = ldap_get_dn( ld, e );
resolved = entry_engine( e, dn, address, to, nto,
togroups, ngroups,
err, nerr, type );
if ( !resolved ) {
add_error( err, nerr, E_NOEMAIL, address, res );
}
}
return ( resolved );
}
/* 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 ( rdnpref == 0 ) {
add_error( err, nerr, E_AMBIGUOUS, address, res );
return 0;
}
/*
* 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], address ) == 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, address, res );
return 0;
/* 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, address, tmpres );
return 0;
/* 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;
/* 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 );
resolved = entry_engine( e, dn, address, to, nto,
togroups, ngroups,
err, nerr, type );
if ( !resolved ) {
add_error( err, nerr, E_NOEMAIL, address, res );
/* Don't free res if we passed it to add_error */
} else {
ldap_msgfree( res );
}
}
return( resolved );
}
static int
url_list_search(
char **urllist,
char *address,
int multi_entry,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr,
int type
)
{
int i;
int resolved = 0;
for ( i = 0; urllist[i]; i++ ) {
if ( !strncasecmp( urllist[i], "mail:", 5 ) ) {
char *vals[2];
vals[0] = urllist[i] + 5;
vals[1] = NULL;
add_to( to, nto, vals );
resolved = 1;
} else if ( ldap_is_ldap_url( urllist[i] ) ) {
resolved = search_ldap_url( urllist[i], NULL,
address, 0, multi_entry,
to, nto, togroups, ngroups,
err, nerr, type );
} else {
/* Produce some sensible error here */
resolved = 0;
}
}
return( resolved );
}
/*
* The entry engine processes an entry. Normally, each entry will resolve
* to one or more values that will be added to the 'to' argument. This
* argument needs not be the global 'to' list, it may be the g_to field
* in a group. Groups have no special treatment, unless they require
* a special sender.
*/
static int
entry_engine(
LDAPMessage *e,
char *dn,
char *address,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr,
int type
)
{
char **vals;
int i;
int resolved = 0;
char ***current_to = to;
int *current_nto = nto;
Group *current_group = NULL;
char buf[1024];
char *localpart, *domainpart;
Subst substs[2];
for ( i=0; attr_semantics[i] != NULL; i++ ) {
AttrSemantics *as = attr_semantics[i];
int nent;
vals = ldap_get_values( ld, e, as->as_name );
if ( !vals || vals[0] == NULL ) {
continue;
}
nent = count_values( vals );
if ( nent > 1 && !as->as_m_valued ) {
add_error( err, nerr, E_AMBIGUOUS, address, e );
return( 0 );
}
switch ( as->as_kind ) {
case AS_KIND_RECIPIENT:
if ( ! ( type & ( USER | GROUP_MEMBERS ) ) )
break;
switch ( as->as_syntax ) {
case AS_SYNTAX_RFC822:
add_to( current_to, current_nto, vals );
resolved = 1;
break;
case AS_SYNTAX_RFC822_EXT:
add_to( current_to, current_nto, vals );
resolved = 1;
break;
case AS_SYNTAX_NATIVE_MB:
/* We used to concatenate mailHost if set here */
/*
* We used to send a copy to the vacation host
* if onVacation to uid@vacationhost
*/
add_to( current_to, current_nto, vals );
resolved = 1;
break;
case AS_SYNTAX_DN:
if ( dn_search( vals, address,
current_to, current_nto,
togroups, ngroups,
err, nerr ) ) {
resolved = 1;
}
break;
case AS_SYNTAX_URL:
if ( url_list_search( vals, address,
as->as_m_entries,
current_to, current_nto,
togroups, ngroups,
err, nerr, type ) ) {
resolved = 1;
}
break;
case AS_SYNTAX_BOOL_FILTER:
if ( strcasecmp( vals[0], "true" ) ) {
break;
}
substs[0].sub_char = 'D';
substs[0].sub_value = dn;
substs[1].sub_char = '\0';
substs[1].sub_value = NULL;
if ( url_list_search( vals, address,
as->as_m_entries,
current_to, current_nto,
togroups, ngroups,
err, nerr, type ) ) {
resolved = 1;
}
break;
default:
syslog( LOG_ALERT,
"Invalid syntax %d for kind %d",
as->as_syntax, as->as_kind );
break;
}
break;
case AS_KIND_ERRORS:
/* This is a group with special processing */
if ( type & GROUP_ERRORS ) {
switch (as->as_kind) {
case AS_SYNTAX_RFC822:
add_to( current_to, current_nto, vals );
resolved = 1;
break;
case AS_SYNTAX_URL:
default:
syslog( LOG_ALERT,
"Invalid syntax %d for kind %d",
as->as_syntax, as->as_kind );
}
} else {
current_group = new_group( dn, togroups,
ngroups );
current_to = &current_group->g_members;
current_nto = &current_group->g_nmembers;
split_address( address,
&localpart, &domainpart );
if ( domainpart ) {
sprintf( buf, "%s-%s@%s",
localpart, ERRORS,
domainpart );
free( localpart );
free( domainpart );
} else {
sprintf( buf, "%s-%s@%s",
localpart, ERRORS,
host );
free( localpart );
}
current_group->g_errorsto = strdup( buf );
}
break;
case AS_KIND_REQUEST:
/* This is a group with special processing */
if ( type & GROUP_REQUEST ) {
add_to( current_to, current_nto, vals );
resolved = 1;
}
break;
case AS_KIND_OWNER:
/* This is a group with special processing */
if ( type & GROUP_REQUEST ) {
add_to( current_to, current_nto, vals );
resolved = 1;
}
break;
default:
syslog( LOG_ALERT,
"Invalid kind %d", as->as_kind );
/* Error, TBC */
}
ldap_value_free( vals );
if ( as->as_final ) {
return( resolved );
}
}
return( resolved );
}
static int
search_bases(
char *filter,
Subst *substs,
char *name,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr,
int type
)
{
int b, resolved = 0;
for ( b = 0; base[b] != NULL; b++ ) {
if ( ! (base[b]->b_search & type) ) {
continue;
}
resolved = search_ldap_url( base[b]->b_url, substs, name,
base[b]->b_rdnpref,
base[b]->b_m_entries,
to, nto, togroups, ngroups,
err, nerr, type );
if ( resolved )
break;
}
return( resolved );
}
static void
do_address(
char *name,
char ***to,
int *nto,
Group **togroups,
int *ngroups,
Error **err,
int *nerr,
int type
)
{
struct timeval timeout;
char *localpart, *domainpart;
int resolved;
Subst substs[5];
/*
* 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.
*/
split_address( name, &localpart, &domainpart );
timeout.tv_sec = MAIL500_TIMEOUT;
timeout.tv_usec = 0;
substs[0].sub_char = 'm';
substs[0].sub_value = name;
substs[1].sub_char = 'h';
substs[1].sub_value = host;
substs[2].sub_char = 'l';
substs[2].sub_value = localpart;
substs[3].sub_char = 'd';
substs[3].sub_value = domainpart;
substs[4].sub_char = '\0';
substs[4].sub_value = NULL;
resolved = search_bases( NULL, substs, name,
to, nto, togroups, ngroups,
err, nerr, type );
if ( !resolved ) {
/* not resolved - bounce with user unknown */
if ( type == USER ) {
add_error( err, nerr, E_USERUNKNOWN, name, NULL );
} else {
add_error( err, nerr, E_GROUPUNKNOWN, name, NULL );
}
}
}
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" );
}
*/
vals = ldap_get_values( ld, e, "description" );
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 void
add_single_to( char ***list, char *new )
{
int nlist;
if ( *list == NULL ) {
nlist = 0;
*list = (char **) malloc( 2 * sizeof(char *) );
} else {
nlist = count_values( *list );
*list = (char **) realloc( *list,
( nlist + 2 ) * sizeof(char *) );
}
(*list)[nlist] = strdup( new );
(*list)[nlist+1] = NULL;
}
static int
isgroup( LDAPMessage *e )
{
int i, j;
char **oclist;
if ( !groupclasses ) {
return( 0 );
}
oclist = ldap_get_values( ld, e, "objectClass" );
for ( i = 0; oclist[i] != NULL; i++ ) {
for ( j = 0; groupclasses[j] != NULL; j++ ) {
if ( strcasecmp( oclist[i], groupclasses[j] ) == 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
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 );
}
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