milter.c revision 7800901e60d340b6af88e94a2149805dcfcaaf56
/*
* Copyright (c) 1999-2006 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sendmail.h>
#if MILTER
# include <sm/sendmail.h>
# include <errno.h>
# if MILTER_NO_NAGLE
# endif /* MILTER_NO_NAGLE */
# endif /* NETINET || NETINET6 */
static void milter_connect_timeout __P((int));
ENVELOPE *, const char *));
ENVELOPE *, const char *));
ENVELOPE *, char *, const char *, bool));
ENVELOPE *));
milters_T *));
ENVELOPE *));
ENVELOPE *));
ENVELOPE *));
static int milter_set_macros __P((char *, char **, char *, int));
/* milter states */
# define MILTER_CHECK_DONE_MSG() \
if (*state == SMFIR_REPLYCODE || \
*state == SMFIR_REJECT || \
*state == SMFIR_DISCARD || \
*state == SMFIR_TEMPFAIL) \
{ \
/* Abort the filters to let them know we are done with msg */ \
milter_abort(e); \
}
{ \
{ \
"filter failure"); \
e->e_quarmsg); \
} \
} \
{ \
{ \
"filter failure"); \
e->e_quarmsg); \
} \
} \
*state = SMFIR_TEMPFAIL; \
*state = SMFIR_SHUTDOWN; \
*state = SMFIR_REJECT; \
else \
# define MILTER_CHECK_REPLYCODE(default) \
rlen < 3 || \
{ \
} \
else \
{ \
\
/* Check for unprotected %'s in the string */ \
while (*ptr != '\0') \
{ \
{ \
break; \
} \
ptr++; \
} \
}
# define MILTER_DF_ERROR(msg) \
{ \
int save_errno = errno; \
\
{ \
sm_dprintf("\n"); \
} \
if (MilterLogLevel > 0) \
if (SuperSafe == SAFE_REALLY) \
{ \
{ \
} \
} \
errno = save_errno; \
}
/*
** MILTER_TIMEOUT -- make sure socket is ready in time
**
** Parameters:
** secs -- number of seconds in timeout
** write -- waiting to read or write?
** started -- whether this is part of a previous sequence
**
** Assumes 'm' is a milter structure for the current socket.
*/
{ \
int ret; \
int save_errno; \
\
{ \
sm_dprintf("milter_%s(%s): socket %d is larger than FD_SETSIZE %d\n", \
SM_FD_SETSIZE); \
if (MilterLogLevel > 0) \
"Milter (%s): socket(%s) %d is larger than FD_SETSIZE %d", \
SM_FD_SETSIZE); \
milter_error(m, e); \
return NULL; \
} \
\
do \
{ \
\
switch (ret) \
{ \
case 0: \
sm_dprintf("milter_%s(%s): timeout, where=%s\n", \
if (MilterLogLevel > 0) \
"Milter (%s): timeout %s data %s, where=%s", \
m->mf_name, \
milter_error(m, e); \
return NULL; \
\
case -1: \
save_errno = errno; \
if (MilterLogLevel > 0) \
{ \
"Milter (%s): select(%s): %s", \
sm_errstring(save_errno)); \
} \
milter_error(m, e); \
return NULL; \
\
default: \
break; \
sm_dprintf("milter_%s(%s): socket not ready\n", \
if (MilterLogLevel > 0) \
{ \
"Milter (%s): socket(%s) not ready", \
} \
milter_error(m, e); \
return NULL; \
} \
}
/*
** Low level functions
*/
/*
** MILTER_READ -- read from a remote milter filter
**
** Parameters:
** m -- milter to read from.
** cmd -- return param for command read.
** rlen -- return length of response string.
** to -- timeout in seconds.
** e -- current envelope.
**
** Returns:
** response string (may be NULL)
*/
static char *
struct milter *m;
char *buf;
ENVELOPE *e;
const char *where;
{
bool started = false;
curl = 0;
if (to > 0)
for (;;)
{
if (to > 0)
{
{
sm_dprintf("milter_sys_read (%s): timeout %s data read in %s",
m->mf_name,
where);
if (MilterLogLevel > 0)
"Milter (%s): timeout %s data read in %s",
m->mf_name,
where);
milter_error(m, e);
return NULL;
}
}
if (len < 0)
{
int save_errno = errno;
sm_dprintf("milter_sys_read(%s): read returned %ld: %s\n",
if (MilterLogLevel > 0)
"Milter (%s): read returned %ld: %s",
milter_error(m, e);
return NULL;
}
started = true;
break;
}
{
sm_dprintf("milter_sys_read(%s): cmd read returned %ld, expecting %ld\n",
if (MilterLogLevel > 0)
"milter_sys_read(%s): cmd read returned %ld, expecting %ld",
milter_error(m, e);
return NULL;
}
return buf;
}
static char *
struct milter *m;
char *cmd;
ENVELOPE *e;
const char *where;
{
mi_int32 i;
# if MILTER_NO_NAGLE && defined(TCP_CORK)
int cork = 0;
# endif /* MILTER_NO_NAGLE && defined(TCP_CORK) */
char *buf;
if (m->mf_sock < 0)
{
if (MilterLogLevel > 0)
"milter_read(%s): socket closed, where=%s",
milter_error(m, e);
return NULL;
}
*rlen = 0;
*cmd = '\0';
if (to > 0)
# if MILTER_NO_NAGLE && defined(TCP_CORK)
sizeof(cork));
# endif /* MILTER_NO_NAGLE && defined(TCP_CORK) */
return NULL;
# if MILTER_NO_NAGLE && defined(TCP_CORK)
cork = 1;
sizeof(cork));
# endif /* MILTER_NO_NAGLE && defined(TCP_CORK) */
/* reset timeout */
if (to > 0)
{
{
sm_dprintf("milter_read(%s): timeout before data read, where=%s\n",
if (MilterLogLevel > 0)
"Milter read(%s): timeout before data read, where=%s",
milter_error(m, e);
return NULL;
}
}
sm_dprintf("milter_read(%s): expecting %ld bytes\n",
if (expl < 0)
{
sm_dprintf("milter_read(%s): read size %ld out of range, where=%s\n",
if (MilterLogLevel > 0)
"milter_read(%s): read size %ld out of range, where=%s",
milter_error(m, e);
return NULL;
}
if (expl == 0)
return NULL;
{
return NULL;
}
sm_dprintf("milter_read(%s): Returning %*s\n",
return buf;
}
/*
** MILTER_WRITE -- write to a remote milter filter
**
** Parameters:
** m -- milter to read from.
** cmd -- command to send.
** buf -- optional command data.
** len -- length of buf.
** to -- timeout in seconds.
** e -- current envelope.
**
** Returns:
** buf if successful, NULL otherwise
** Not actually used anywhere but function prototype
** must match milter_read()
*/
static char *
struct milter *m;
int cmd;
char *buf;
ENVELOPE *e;
const char *where;
{
int num_vectors;
bool started = false;
/*
** At most two buffers will be written, though
** only one may actually be used (see num_vectors).
*/
{
sm_dprintf("milter_write(%s): length %ld out of range\n",
if (MilterLogLevel > 0)
"milter_write(%s): length %ld out of range",
milter_error(m, e);
return NULL;
}
if (m->mf_sock < 0)
{
if (MilterLogLevel > 0)
"milter_write(%s): socket closed",
m->mf_name);
milter_error(m, e);
return NULL;
}
sm_dprintf("milter_write(%s): cmd %c, len %ld\n",
/* set up the vector for the size / command */
/*
** Determine if there is command data. If so, there will be two
** vectors. If not, there will be only one. The vectors are set
** up here and 'num_vectors' and 'sl' are set appropriately.
*/
/* NOTE: len<0 has already been checked for. Pedantic */
{
/* There is no command data -- only a size / command data */
num_vectors = 1;
}
else
{
/*
** There is both size / command and command data.
** Set up the vector for the command data.
*/
num_vectors = 2;
sm_dprintf("milter_write(%s): Sending %*s\n",
}
if (to > 0)
{
writestart = curtime();
}
/* write the vector(s) */
if (i != sl)
{
int save_errno = errno;
sm_dprintf("milter_write(%s): write(%c) returned %ld, expected %ld: %s\n",
if (MilterLogLevel > 0)
"Milter (%s): write(%c) returned %ld, expected %ld: %s",
milter_error(m, e);
return NULL;
}
return buf;
}
/*
** Utility functions
*/
/*
** MILTER_OPEN -- connect to remote milter filter
**
** Parameters:
** m -- milter to connect to.
** parseonly -- parse but don't connect.
** e -- current envelope.
**
** Returns:
** connected socket if successful && !parseonly,
** 0 upon parse success if parseonly,
** -1 otherwise.
*/
static jmp_buf MilterConnectTimeout;
static int
milter_open(m, parseonly, e)
struct milter *m;
bool parseonly;
ENVELOPE *e;
{
int sock = 0;
SOCKADDR_LEN_T addrlen = 0;
int addrno = 0;
int save_errno;
char *p;
char *colon;
char *at;
{
sm_dprintf("X%s: empty or missing socket information\n",
m->mf_name);
if (parseonly)
syserr("X%s: empty or missing socket information",
m->mf_name);
else if (MilterLogLevel > 0)
"Milter (%s): empty or missing socket information",
m->mf_name);
milter_error(m, e);
return -1;
}
/* protocol:filename or protocol:port@host */
p = m->mf_conn;
{
*colon = '\0';
if (*p == '\0')
{
# if NETUNIX
/* default to AF_UNIX */
# else /* NETUNIX */
# if NETINET
/* default to AF_INET */
# else /* NETINET */
# if NETINET6
/* default to AF_INET6 */
# else /* NETINET6 */
/* no protocols available */
if (MilterLogLevel > 0)
"Milter (%s): no valid socket protocols available",
m->mf_name);
milter_error(m, e);
return -1;
# endif /* NETINET6 */
# endif /* NETINET */
# endif /* NETUNIX */
}
# if NETUNIX
else if (sm_strcasecmp(p, "unix") == 0 ||
sm_strcasecmp(p, "local") == 0)
# endif /* NETUNIX */
# if NETINET
else if (sm_strcasecmp(p, "inet") == 0)
# endif /* NETINET */
# if NETINET6
else if (sm_strcasecmp(p, "inet6") == 0)
# endif /* NETINET6 */
else
{
# ifdef EPROTONOSUPPORT
# else /* EPROTONOSUPPORT */
# endif /* EPROTONOSUPPORT */
sm_dprintf("X%s: unknown socket type %s\n",
m->mf_name, p);
if (parseonly)
syserr("X%s: unknown socket type %s",
m->mf_name, p);
else if (MilterLogLevel > 0)
"Milter (%s): unknown socket type %s",
m->mf_name, p);
milter_error(m, e);
return -1;
}
*colon++ = ':';
}
else
{
/* default to AF_UNIX */
colon = p;
}
# if NETUNIX
{
{
sm_dprintf("X%s: local socket name %s too long\n",
if (parseonly)
syserr("X%s: local socket name %s too long",
else if (MilterLogLevel > 0)
"Milter (%s): local socket name %s too long",
milter_error(m, e);
return -1;
}
/* if just parsing .cf file, socket doesn't need to exist */
{
OpMode == MD_FGDAEMON)
"WARNING: X%s: local socket name %s missing\n",
}
else if (errno != 0)
{
/* if not safe, don't create */
save_errno = errno;
sm_dprintf("X%s: local socket name %s unsafe\n",
errno = save_errno;
if (parseonly)
{
OpMode == MD_FGDAEMON ||
syserr("X%s: local socket name %s unsafe",
}
else if (MilterLogLevel > 0)
"Milter (%s): local socket name %s unsafe",
milter_error(m, e);
return -1;
}
addrlen = sizeof(struct sockaddr_un);
}
else
# endif /* NETUNIX */
if (false
# if NETINET
# endif /* NETINET */
# if NETINET6
# endif /* NETINET6 */
)
{
unsigned short port;
/* Parse port@host */
{
sm_dprintf("X%s: bad address %s (expected port@host)\n",
if (parseonly)
syserr("X%s: bad address %s (expected port@host)",
else if (MilterLogLevel > 0)
"Milter (%s): bad address %s (expected port@host)",
milter_error(m, e);
return -1;
}
*at = '\0';
else
{
# ifdef NO_GETSERVBYNAME
sm_dprintf("X%s: invalid port number %s\n",
if (parseonly)
syserr("X%s: invalid port number %s",
else if (MilterLogLevel > 0)
"Milter (%s): invalid port number %s",
milter_error(m, e);
return -1;
# else /* NO_GETSERVBYNAME */
{
save_errno = errno;
sm_dprintf("X%s: unknown port name %s\n",
errno = save_errno;
if (parseonly)
syserr("X%s: unknown port name %s",
else if (MilterLogLevel > 0)
"Milter (%s): unknown port name %s",
milter_error(m, e);
return -1;
}
# endif /* NO_GETSERVBYNAME */
}
*at++ = '@';
if (*at == '[')
{
char *end;
{
bool found = false;
# if NETINET
unsigned long hid = INADDR_NONE;
# endif /* NETINET */
# if NETINET6
struct sockaddr_in6 hid6;
# endif /* NETINET6 */
*end = '\0';
# if NETINET
{
found = true;
}
# endif /* NETINET */
# if NETINET6
{
found = true;
}
# endif /* NETINET6 */
*end = ']';
if (!found)
{
sm_dprintf("X%s: Invalid numeric domain spec \"%s\"\n",
if (parseonly)
syserr("X%s: Invalid numeric domain spec \"%s\"",
else if (MilterLogLevel > 0)
"Milter (%s): Invalid numeric domain spec \"%s\"",
milter_error(m, e);
return -1;
}
}
else
{
sm_dprintf("X%s: Invalid numeric domain spec \"%s\"\n",
if (parseonly)
syserr("X%s: Invalid numeric domain spec \"%s\"",
else if (MilterLogLevel > 0)
"Milter (%s): Invalid numeric domain spec \"%s\"",
milter_error(m, e);
return -1;
}
}
else
{
{
save_errno = errno;
sm_dprintf("X%s: Unknown host name %s\n",
errno = save_errno;
if (parseonly)
syserr("X%s: Unknown host name %s",
else if (MilterLogLevel > 0)
"Milter (%s): Unknown host name %s",
milter_error(m, e);
return -1;
}
switch (hp->h_addrtype)
{
# if NETINET
case AF_INET:
addrlen = sizeof(struct sockaddr_in);
addrno = 1;
break;
# endif /* NETINET */
# if NETINET6
case AF_INET6:
addrlen = sizeof(struct sockaddr_in6);
addrno = 1;
break;
# endif /* NETINET6 */
default:
sm_dprintf("X%s: Unknown protocol for %s (%d)\n",
hp->h_addrtype);
if (parseonly)
syserr("X%s: Unknown protocol for %s (%d)",
else if (MilterLogLevel > 0)
"Milter (%s): Unknown protocol for %s (%d)",
hp->h_addrtype);
milter_error(m, e);
# if NETINET6
# endif /* NETINET6 */
return -1;
}
}
}
else
# endif /* NETINET || NETINET6 */
{
sm_dprintf("X%s: unknown socket protocol\n",
m->mf_name);
if (parseonly)
else if (MilterLogLevel > 0)
"Milter (%s): unknown socket protocol",
m->mf_name);
milter_error(m, e);
return -1;
}
/* just parsing through? */
if (parseonly)
{
m->mf_state = SMFS_READY;
# if NETINET6
# endif /* NETINET6 */
return 0;
}
/* sanity check */
if (m->mf_state != SMFS_READY &&
m->mf_state != SMFS_CLOSED)
{
/* shouldn't happen */
sm_dprintf("Milter (%s): Trying to open filter in state %c\n",
milter_error(m, e);
# if NETINET6
# endif /* NETINET6 */
return -1;
}
/* nope, actually connecting */
for (;;)
{
if (sock < 0)
{
save_errno = errno;
sm_dprintf("Milter (%s): error creating socket: %s\n",
m->mf_name,
if (MilterLogLevel > 0)
"Milter (%s): error creating socket: %s",
milter_error(m, e);
# if NETINET6
# endif /* NETINET6 */
return -1;
}
if (setjmp(MilterConnectTimeout) == 0)
{
int i;
if (m->mf_timeout[SMFTO_CONNECT] > 0)
save_errno = errno;
errno = save_errno;
if (i >= 0)
break;
}
/* couldn't connect.... try next address */
save_errno = errno;
p = CurHostName;
CurHostName = at;
sm_dprintf("milter_open (%s): open %s failed: %s\n",
if (MilterLogLevel > 13)
"Milter (%s): open %s failed: %s",
CurHostName = p;
/* try next address */
{
{
# if NETINET
case AF_INET:
INADDRSZ);
break;
# endif /* NETINET */
# if NETINET6
case AF_INET6:
break;
# endif /* NETINET6 */
default:
sm_dprintf("X%s: Unknown protocol for %s (%d)\n",
hp->h_addrtype);
if (MilterLogLevel > 0)
"Milter (%s): Unknown protocol for %s (%d)",
hp->h_addrtype);
milter_error(m, e);
# if NETINET6
# endif /* NETINET6 */
return -1;
}
continue;
}
p = CurHostName;
CurHostName = at;
sm_dprintf("X%s: error connecting to filter: %s\n",
if (MilterLogLevel > 0)
"Milter (%s): error connecting to filter: %s",
CurHostName = p;
milter_error(m, e);
# if NETINET6
# endif /* NETINET6 */
return -1;
}
# if NETINET6
{
}
# endif /* NETINET6 */
# if MILTER_NO_NAGLE && !defined(TCP_CORK)
{
int nodelay = 1;
}
# endif /* MILTER_NO_NAGLE && !defined(TCP_CORK) */
return sock;
}
static void
int ignore;
{
/*
** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD
** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
** DOING.
*/
}
/*
** MILTER_SETUP -- setup structure for a mail filter
**
** Parameters:
** line -- the options line.
**
** Returns:
** none
*/
void
char *line;
{
char fcode;
char *p;
struct milter *m;
STAB *s;
/* collect the filter name */
for (p = line;
p++)
continue;
if (*p != '\0')
*p++ = '\0';
if (line[0] == '\0')
{
syserr("name required for mail filter");
return;
}
memset((char *) m, '\0', sizeof(*m));
m->mf_state = SMFS_READY;
m->mf_sock = -1;
m->mf_mta_actions = SMFI_CURR_ACTS;
#endif /* _FFR_MILTER_CHECK */
/* now scan through and assign info from the fields */
while (*p != '\0')
{
char *delimptr;
while (*p != '\0' &&
p++;
/* p now points to field code */
fcode = *p;
while (*p != '\0' && *p != '=' && *p != ',')
p++;
if (*p++ != '=')
{
return;
}
p++;
/* p now points to the field body */
/* install the field into the filter struct */
switch (fcode)
{
case 'S': /* socket */
if (p == NULL)
else
break;
case 'F': /* Milter flags configured on MTA */
for (; *p != '\0'; p++)
{
}
break;
case 'T': /* timeouts */
milter_parse_timeouts(p, m);
break;
case 'a':
break;
case 'f':
break;
case 'v':
break;
#endif /* _FFR_MILTER_CHECK */
default:
syserr("X%s: unknown filter equate %c=",
break;
}
p = delimptr;
}
/* early check for errors */
(void) milter_open(m, true, CurEnv);
/* enter the filter into the symbol table */
else
s->s_milter = m;
}
/*
** MILTER_CONFIG -- parse option list into an array and check config
**
** Called when reading configuration file.
**
** Parameters:
** spec -- the filter list.
** list -- the array to fill in.
** max -- the maximum number of entries in list.
**
** Returns:
** none
*/
void
char *spec;
int max;
{
int numitems = 0;
char *p;
/* leave one for the NULL signifying the end of the list */
max--;
{
STAB *s;
p++;
if (*p == '\0')
break;
spec = p;
{
if (max > 0)
return;
}
p = strpbrk(p, ";,");
if (p != NULL)
*p++ = '\0';
if (s == NULL)
{
return;
}
}
/* if not set, set to LogLevel */
if (MilterLogLevel == -1)
}
/*
** MILTER_PARSE_TIMEOUTS -- parse timeout list
**
** Called when reading configuration file.
**
** Parameters:
** spec -- the timeout list.
** m -- milter to set.
**
** Returns:
** none
*/
static void
char *spec;
struct milter *m;
{
char fcode;
int tcode;
char *p;
p = spec;
/* now scan through and assign info from the fields */
while (*p != '\0')
{
char *delimptr;
while (*p != '\0' &&
p++;
/* p now points to field code */
fcode = *p;
while (*p != '\0' && *p != ':')
p++;
if (*p++ != ':')
{
return;
}
p++;
/* p now points to the field body */
tcode = -1;
/* install the field into the filter struct */
switch (fcode)
{
case 'C':
break;
case 'S':
tcode = SMFTO_WRITE;
break;
case 'R':
tcode = SMFTO_READ;
break;
case 'E':
break;
default:
sm_dprintf("X%s: %c unknown\n",
syserr("X%s: unknown filter timeout %c",
break;
}
if (tcode >= 0)
{
sm_dprintf("X%s: %c=%ld\n",
}
p = delimptr;
}
}
/*
** MILTER_SET_MACROS -- set milter macros
**
** Parameters:
** name -- name of milter.
** macros -- where to store macros.
** val -- the value of the option.
** nummac -- current number of macros
**
** Returns:
** new number of macros
*/
static int
char *name;
char **macros;
char *val;
int nummac;
{
char *p;
while (*p != '\0')
{
char *macro;
/* Skip leading commas, spaces */
while (*p != '\0' &&
p++;
if (*p == '\0')
break;
/* Find end of macro */
macro = p;
while (*p != '\0' && *p != ',' &&
p++;
if (*p != '\0')
*p++ = '\0';
if (nummac >= MAXFILTERMACROS)
{
syserr("milter_set_option: too many macros in Milter.%s (max %d)",
return -1;
}
}
return nummac;
}
/*
** MILTER_SET_OPTION -- set an individual milter option
**
** Parameters:
** name -- the name of the option.
** val -- the value of the option.
** sticky -- if set, don't let other setoptions override
** this value.
**
** Returns:
** none.
*/
/* set if Milter sub-option is stuck */
static BITMAP256 StickyMilterOpt;
static struct milteropt
{
char *mo_name; /* long name of milter option */
unsigned char mo_code; /* code for option */
} MilterOptTab[] =
{
# define MO_MACROS_CONNECT SMFIM_CONNECT
{ "macros.connect", MO_MACROS_CONNECT },
# define MO_MACROS_HELO SMFIM_HELO
{ "macros.helo", MO_MACROS_HELO },
# define MO_MACROS_ENVFROM SMFIM_ENVFROM
{ "macros.envfrom", MO_MACROS_ENVFROM },
# define MO_MACROS_ENVRCPT SMFIM_ENVRCPT
{ "macros.envrcpt", MO_MACROS_ENVRCPT },
# define MO_MACROS_DATA SMFIM_DATA
{ "macros.data", MO_MACROS_DATA },
# define MO_MACROS_EOM SMFIM_EOM
{ "macros.eom", MO_MACROS_EOM },
# define MO_MACROS_EOH SMFIM_EOH
{ "macros.eoh", MO_MACROS_EOH },
# define MO_LOGLEVEL 0x07
{ "loglevel", MO_LOGLEVEL },
# if _FFR_MAXDATASIZE
# define MO_MAXDATASIZE 0x08
{ "maxdatasize", MO_MAXDATASIZE },
# endif /* _FFR_MAXDATASIZE */
{ NULL, (unsigned char)-1 },
};
void
char *name;
char *val;
bool sticky;
{
int nummac, r;
nummac = 0;
{
syserr("milter_set_option: invalid Milter option, must specify suboption");
return;
}
{
break;
}
{
return;
}
/*
** See if this option is preset for us.
*/
{
sm_dprintf(" (ignored)\n");
return;
}
sm_dprintf("\n");
{
case MO_LOGLEVEL:
break;
#if _FFR_MAXDATASIZE
case MO_MAXDATASIZE:
break;
#endif /* _FFR_MAXDATASIZE */
case MO_MACROS_CONNECT:
/* FALLTHROUGH */
case MO_MACROS_HELO:
/* FALLTHROUGH */
case MO_MACROS_ENVFROM:
/* FALLTHROUGH */
case MO_MACROS_ENVRCPT:
/* FALLTHROUGH */
case MO_MACROS_EOH:
/* FALLTHROUGH */
case MO_MACROS_EOM:
/* FALLTHROUGH */
case MO_MACROS_DATA:
if (r >= 0)
nummac = r;
break;
default:
break;
}
if (sticky)
}
/*
** MILTER_REOPEN_DF -- open & truncate the data file (for replbody)
**
** Parameters:
** e -- current envelope.
**
** Returns:
** 0 if succesful, -1 otherwise
*/
static int
ENVELOPE *e;
{
char dfname[MAXPATHLEN];
/*
** In SuperSafe == SAFE_REALLY mode, e->e_dfp is a read-only FP so
** close and reopen writable (later close and reopen
** read only again).
**
** In SuperSafe != SAFE_REALLY mode, e->e_dfp still points at the
** buffered file I/O descriptor, still open for writing so there
** isn't any work to do here (except checking for consistency).
*/
if (SuperSafe == SAFE_REALLY)
{
/* close read-only data file */
{
}
/* open writable */
{
MILTER_DF_ERROR("milter_reopen_df: sm_io_open %s: %s");
return -1;
}
}
{
/* shouldn't happen */
MILTER_DF_ERROR("milter_reopen_df: NULL e_dfp (%s: %s)");
return -1;
}
return 0;
}
/*
** MILTER_RESET_DF -- re-open read-only the data file (for replbody)
**
** Parameters:
** e -- current envelope.
**
** Returns:
** 0 if succesful, -1 otherwise
*/
static int
ENVELOPE *e;
{
int afd;
char dfname[MAXPATHLEN];
sm_io_error(e->e_dfp))
{
MILTER_DF_ERROR("milter_reset_df: error writing/flushing %s: %s");
return -1;
}
else if (SuperSafe != SAFE_REALLY)
{
/* skip next few clauses */
/* EMPTY */
}
{
MILTER_DF_ERROR("milter_reset_df: error sync'ing %s: %s");
return -1;
}
{
MILTER_DF_ERROR("milter_reset_df: error closing %s: %s");
return -1;
}
{
MILTER_DF_ERROR("milter_reset_df: error reopening %s: %s");
return -1;
}
else
return 0;
}
/*
** MILTER_QUIT_FILTER -- close down a single filter
**
** Parameters:
** m -- milter structure of filter to close down.
** e -- current envelope.
**
** Returns:
** none
*/
static void
milter_quit_filter(m, e)
struct milter *m;
ENVELOPE *e;
{
if (MilterLogLevel > 18)
m->mf_name);
/* Never replace error state */
if (m->mf_state == SMFS_ERROR)
return;
if (m->mf_sock < 0 ||
m->mf_state == SMFS_CLOSED ||
m->mf_state == SMFS_READY)
{
m->mf_sock = -1;
m->mf_state = SMFS_CLOSED;
return;
}
if (m->mf_sock >= 0)
{
m->mf_sock = -1;
}
if (m->mf_state != SMFS_ERROR)
m->mf_state = SMFS_CLOSED;
}
/*
** MILTER_ABORT_FILTER -- tell filter to abort current message
**
** Parameters:
** m -- milter structure of filter to abort.
** e -- current envelope.
**
** Returns:
** none
*/
static void
milter_abort_filter(m, e)
struct milter *m;
ENVELOPE *e;
{
if (MilterLogLevel > 10)
m->mf_name);
if (m->mf_sock < 0 ||
m->mf_state != SMFS_INMSG)
return;
if (m->mf_state != SMFS_ERROR)
}
/*
** MILTER_SEND_MACROS -- provide macros to the filters
**
** Parameters:
** m -- milter to send macros to.
** macros -- macros to send for filter smfi_getsymval().
** cmd -- which command the macros are associated with.
** e -- current envelope (for macro access).
**
** Returns:
** none
*/
static void
struct milter *m;
char **macros;
int cmd;
ENVELOPE *e;
{
int i;
int mid;
char *v;
ssize_t s;
/* sanity check */
return;
/* put together data */
s = 1; /* for the command character */
{
if (mid == 0)
continue;
if (v == NULL)
continue;
}
if (s < 0)
return;
{
if (mid == 0)
continue;
if (v == NULL)
continue;
sm_dprintf("milter_send_macros(%s, %c): %s=%s\n",
}
}
/*
** MILTER_SEND_COMMAND -- send a command and return the response for a filter
**
** Parameters:
** m -- current milter filter
** cmd -- command to send.
** data -- optional command data.
** sz -- length of buf.
** e -- current envelope (for e->e_id).
** state -- return state word.
**
** Returns:
** response string (may be NULL)
*/
static char *
struct milter *m;
int cmd;
void *data;
ENVELOPE *e;
char *state;
const char *where;
{
char rcmd;
unsigned long skipflag;
unsigned long norespflag = 0;
char *action;
char *defresponse;
char *response;
sm_dprintf("milter_send_command(%s): cmd %c len %ld\n",
/* find skip flag and default failure */
switch (command)
{
case SMFIC_CONNECT:
action = "connect";
defresponse = "554 Command rejected";
break;
case SMFIC_HELO:
action = "helo";
defresponse = "550 Command rejected";
break;
case SMFIC_MAIL:
action = "mail";
defresponse = "550 5.7.1 Command rejected";
break;
case SMFIC_RCPT:
action = "rcpt";
defresponse = "550 5.7.1 Command rejected";
break;
case SMFIC_HEADER:
action = "header";
defresponse = "550 5.7.1 Command rejected";
break;
case SMFIC_BODY:
action = "body";
defresponse = "554 5.7.1 Command rejected";
break;
case SMFIC_EOH:
action = "eoh";
defresponse = "550 5.7.1 Command rejected";
break;
case SMFIC_UNKNOWN:
action = "unknown";
defresponse = "550 5.7.1 Command rejected";
break;
case SMFIC_DATA:
action = "data";
defresponse = "550 5.7.1 Command rejected";
break;
case SMFIC_BODYEOB:
case SMFIC_OPTNEG:
case SMFIC_MACRO:
case SMFIC_ABORT:
case SMFIC_QUIT:
/* NOTE: not handled by milter_send_command() */
/* FALLTHROUGH */
default:
skipflag = 0;
action = "default";
defresponse = "550 5.7.1 Command rejected";
break;
}
sm_dprintf("milter_send_command(%s): skip=%lx, pflags=%x\n",
/* check if filter wants this command */
return NULL;
/* send the command to the filter */
if (m->mf_state == SMFS_ERROR)
{
MILTER_CHECK_ERROR(false, return NULL);
return NULL;
}
/* check if filter sends response to this command */
return NULL;
/* get the response from the filter */
if (m->mf_state == SMFS_ERROR)
{
MILTER_CHECK_ERROR(false, return NULL);
return NULL;
}
sm_dprintf("milter_send_command(%s): returned %c\n",
switch (rcmd)
{
case SMFIR_REPLYCODE:
if (MilterLogLevel > 10)
"milter=%s, action=%s, reject=%s",
break;
case SMFIR_REJECT:
if (MilterLogLevel > 10)
"milter=%s, action=%s, reject",
break;
case SMFIR_DISCARD:
if (MilterLogLevel > 10)
"milter=%s, action=%s, discard",
break;
case SMFIR_TEMPFAIL:
if (MilterLogLevel > 10)
"milter=%s, action=%s, tempfail",
break;
case SMFIR_ACCEPT:
/* this filter is done with message/connection */
if (command == SMFIC_HELO ||
command == SMFIC_CONNECT)
m->mf_state = SMFS_CLOSABLE;
else
if (MilterLogLevel > 10)
"milter=%s, action=%s, accepted",
break;
case SMFIR_CONTINUE:
/* if MAIL command is ok, filter is in message state */
if (command == SMFIC_MAIL)
m->mf_state = SMFS_INMSG;
if (MilterLogLevel > 12)
"milter=%s, action=%s, continue",
break;
case SMFIR_SKIP:
if (MilterLogLevel > 12)
"milter=%s, action=%s, skip",
break;
default:
/* Invalid response to command */
if (MilterLogLevel > 0)
"milter_send_command(%s): action=%s returned bogus response %c",
milter_error(m, e);
break;
}
{
}
return response;
}
/*
** MILTER_COMMAND -- send a command and return the response for each filter
**
** Parameters:
** cmd -- command to send.
** data -- optional command data.
** sz -- length of buf.
** macros -- macros to send for filter smfi_getsymval().
** e -- current envelope (for macro access).
** state -- return state word.
** where -- description of calling function (logging).
** cmd_error -- did the SMTP command cause an error?
**
** Returns:
** response string (may be NULL)
*/
static char *
int cmd;
void *data;
char **macros;
ENVELOPE *e;
char *state;
const char *where;
bool cmd_error;
{
int i;
sm_dprintf("milter_command: cmd %c len %ld\n",
*state = SMFIR_CONTINUE;
for (i = 0; InputFilters[i] != NULL; i++)
{
struct milter *m = InputFilters[i];
/* previous problem? */
if (m->mf_state == SMFS_ERROR)
{
MILTER_CHECK_ERROR(false, continue);
break;
}
/* sanity check */
if (m->mf_sock < 0 ||
continue;
/* send macros (regardless of whether we send command) */
{
if (m->mf_state == SMFS_ERROR)
{
MILTER_CHECK_ERROR(false, continue);
break;
}
}
if (MilterLogLevel > 21)
/*
** send the command if
** there is no error
** or it's RCPT and the client asked for it:
** !cmd_error ||
** where == "rcpt" && m->mf_pflags & SMFIP_RCPT_REJ != 0
** negate that condition and use continue
*/
if (cmd_error &&
(m->mf_pflags & SMFIP_RCPT_REJ) == 0))
continue;
where);
if (MilterLogLevel > 21)
{
/* log the time it took for the command per filter */
"Milter (%s): time command (%c), %d",
}
if (*state != SMFIR_CONTINUE)
break;
}
return response;
}
static int
struct milter *m;
char *buf;
int rlen;
int offset;
{
int i, r, nummac;
mi_int32 v;
{
char **macros;
nummac = 0;
i = ntohl(v);
if (i < SMFIM_FIRST || i > SMFIM_LAST)
return -1;
switch (i)
{
case MO_MACROS_CONNECT:
/* FALLTHROUGH */
case MO_MACROS_HELO:
/* FALLTHROUGH */
case MO_MACROS_ENVFROM:
/* FALLTHROUGH */
case MO_MACROS_ENVRCPT:
/* FALLTHROUGH */
case MO_MACROS_EOM:
/* FALLTHROUGH */
case MO_MACROS_EOH:
/* FALLTHROUGH */
case MO_MACROS_DATA:
if (len > 0)
{
if (r >= 0)
nummac = r;
}
break;
default:
return -1;
}
if (len == 0)
return -1;
}
return 0;
}
/*
** MILTER_NEGOTIATE -- get version and flags from filter
**
** Parameters:
** m -- milter filter structure.
** e -- current envelope.
** milters -- milters structure.
**
** Returns:
** 0 on success, -1 otherwise
*/
static int
milter_negotiate(m, e, milters)
struct milter *m;
ENVELOPE *e;
{
char rcmd;
char *response;
char data[MILTER_OPTLEN];
/* sanity check */
{
if (MilterLogLevel > 0)
"Milter (%s): negotiate, impossible state",
m->mf_name);
milter_error(m, e);
return -1;
}
mta_actions = m->mf_mta_actions;
#else /* _FFR_MILTER_CHECK */
#endif /* _FFR_MILTER_CHECK */
(char *) &fflags, MILTER_LEN_BYTES);
(char *) &pflags, MILTER_LEN_BYTES);
if (m->mf_state == SMFS_ERROR)
return -1;
sm_dprintf("milter_negotiate(%s): send: version %lu, fflags 0x%lx, pflags 0x%lx\n",
"negotiate");
if (m->mf_state == SMFS_ERROR)
return -1;
if (rcmd != SMFIC_OPTNEG)
{
sm_dprintf("milter_negotiate(%s): returned %c instead of %c\n",
if (MilterLogLevel > 0)
"Milter (%s): negotiate: returned %c instead of %c",
milter_error(m, e);
return -1;
}
/* Make sure we have enough bytes for the version */
{
sm_dprintf("milter_negotiate(%s): did not return valid info\n",
m->mf_name);
if (MilterLogLevel > 0)
"Milter (%s): negotiate: did not return valid info",
m->mf_name);
milter_error(m, e);
return -1;
}
/* extract information */
/* Now make sure we have enough for the feature bitmap */
if (rlen < MILTER_OPTLEN)
{
sm_dprintf("milter_negotiate(%s): did not return enough info\n",
m->mf_name);
if (MilterLogLevel > 0)
"Milter (%s): negotiate: did not return enough info",
m->mf_name);
milter_error(m, e);
return -1;
}
/* check for version compatibility */
if (m->mf_fvers == 1 ||
m->mf_fvers > SMFI_VERSION)
{
sm_dprintf("milter_negotiate(%s): version %d != MTA milter version %d\n",
if (MilterLogLevel > 0)
"Milter (%s): negotiate: version %d != MTA milter version %d",
milter_error(m, e);
goto error;
}
/* check for filter feature mismatch */
{
sm_dprintf("milter_negotiate(%s): filter abilities 0x%x != MTA milter abilities 0x%lx\n",
(unsigned long) mta_actions);
if (MilterLogLevel > 0)
"Milter (%s): negotiate: filter abilities 0x%x != MTA milter abilities 0x%lx",
(unsigned long) mta_actions);
milter_error(m, e);
goto error;
}
/* check for protocol feature mismatch */
{
sm_dprintf("milter_negotiate(%s): protocol abilities 0x%x != MTA milter abilities 0x%lx\n",
(unsigned long) mta_prot_flags);
if (MilterLogLevel > 0)
"Milter (%s): negotiate: protocol abilities 0x%x != MTA milter abilities 0x%lx",
(unsigned long) mta_prot_flags);
milter_error(m, e);
goto error;
}
if (m->mf_fvers <= 2)
m->mf_pflags |= SMFIP_NOUNKNOWN;
if (m->mf_fvers <= 3)
m->mf_pflags |= SMFIP_NODATA;
if (rlen > MILTER_OPTLEN)
{
}
sm_dprintf("milter_negotiate(%s): received: version %u, fflags 0x%x, pflags 0x%x\n",
return 0;
return -1;
}
/*
** MILTER_PER_CONNECTION_CHECK -- checks on per-connection commands
**
** Reduce code duplication by putting these checks in one place
**
** Parameters:
** e -- current envelope.
**
** Returns:
** none
*/
static void
ENVELOPE *e;
{
int i;
/* see if we are done with any of the filters */
for (i = 0; InputFilters[i] != NULL; i++)
{
struct milter *m = InputFilters[i];
if (m->mf_state == SMFS_CLOSABLE)
milter_quit_filter(m, e);
}
}
/*
** MILTER_ERROR -- Put a milter filter into error state
**
** Parameters:
** m -- the broken filter.
** e -- current envelope.
**
** Returns:
** none
*/
static void
milter_error(m, e)
struct milter *m;
ENVELOPE *e;
{
/*
** We could send a quit here but we may have gotten here due to
** an I/O error so we don't want to try to make things worse.
*/
if (m->mf_sock >= 0)
{
m->mf_sock = -1;
}
m->mf_state = SMFS_ERROR;
if (MilterLogLevel > 0)
m->mf_name);
}
/*
** MILTER_HEADERS -- send headers to a single milter filter
**
** Parameters:
** m -- current filter.
** e -- current envelope.
** state -- return state from response.
**
** Returns:
** response string (may be NULL)
*/
static char *
milter_headers(m, e, state)
struct milter *m;
ENVELOPE *e;
char *state;
{
HDR *h;
if (MilterLogLevel > 17)
m->mf_name);
{
/* don't send over deleted headers */
{
/* strip H_USER so not counted in milter_changeheader() */
continue;
}
/* skip auto-generated */
continue;
sm_dprintf("milter_headers: %s:%s\n",
if (MilterLogLevel > 21)
|| *(h->h_value) != ' ')
else
if (len_t < 0)
continue;
/*
** Note: currently the call to dequote_internal_chars()
** is not required as h_field is supposed to be 7-bit US-ASCII.
*/
/* send it over */
if (m->mf_state == SMFS_ERROR ||
*state != SMFIR_CONTINUE)
break;
}
if (MilterLogLevel > 17)
m->mf_name);
return response;
}
/*
** MILTER_BODY -- send the body to a filter
**
** Parameters:
** m -- current filter.
** e -- current envelope.
** state -- return state from response.
**
** Returns:
** response string (may be NULL)
*/
static char *
milter_body(m, e, state)
struct milter *m;
ENVELOPE *e;
char *state;
{
char bufchar = '\0';
char prevchar = '\0';
int c;
char *bp;
char buf[MILTER_CHUNK_SIZE];
sm_dprintf("milter_body\n");
{
*state = SMFIR_TEMPFAIL;
syserr("milter_body: %s/%cf%s: rewind error",
DATAFL_LETTER, e->e_id);
return NULL;
}
if (MilterLogLevel > 17)
m->mf_name);
{
/* Change LF to CRLF */
if (c == '\n')
{
/* Not a CRLF already? */
if (prevchar != '\r')
#endif /* !_FFR_MILTER_CONVERT_ALL_LF_TO_CRLF */
{
/* Room for CR now? */
{
/* No room, buffer LF */
bufchar = c;
/* and send CR now */
c = '\r';
}
else
{
/* Room to do it now */
*bp++ = '\r';
prevchar = '\r';
}
}
}
*bp++ = (char) c;
prevchar = c;
{
/* send chunk */
"body chunk");
if (bufchar != '\0')
{
bufchar = '\0';
}
}
if (m->mf_state == SMFS_ERROR ||
*state != SMFIR_CONTINUE)
break;
}
/* check for read errors */
if (sm_io_error(e->e_dfp))
{
if (*state == SMFIR_CONTINUE ||
*state == SMFIR_ACCEPT ||
{
*state = SMFIR_TEMPFAIL;
{
}
}
syserr("milter_body: %s/%cf%s: read error",
DATAFL_LETTER, e->e_id);
return response;
}
/* send last body chunk */
m->mf_state != SMFS_ERROR &&
*state == SMFIR_CONTINUE)
{
/* send chunk */
e, state, "last body chunk");
}
if (MilterLogLevel > 17)
m->mf_name);
{
*state = SMFIR_CONTINUE;
m->mf_state = SMFS_READY;
}
return response;
}
/*
** Actions
*/
/*
** ADDLEADINGSPACE -- Add a leading space to a string
**
** Parameters:
** str -- string
** rp -- resource pool for allocations
**
** Returns:
** pointer to new string
*/
static char *
char *str;
SM_RPOOL_T *rp;
{
size_t l;
char *new;
SM_ASSERT(l + 2 > l);
new[0] = ' ';
return new;
}
/*
** MILTER_ADDHEADER -- Add the supplied header to the message
**
** Parameters:
** m -- current filter.
** rlen -- length of response.
** e -- current envelope.
**
** Returns:
** none
*/
static void
struct milter *m;
char *response;
ENVELOPE *e;
{
int mh_v_len;
HDR *h;
sm_dprintf("milter_addheader: ");
/* sanity checks */
{
sm_dprintf("NULL response\n");
return;
}
{
sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
return;
}
/* Find separating NUL */
/* another sanity check */
{
sm_dprintf("didn't follow protocol (part len)\n");
return;
}
if (*response == '\0')
{
sm_dprintf("empty field name\n");
return;
}
{
break;
}
mh_v_len = 0;
/* add to e_msgsize */
if (h != NULL)
{
sm_dprintf("Replace default header %s value with %s\n",
if (MilterLogLevel > 8)
"Milter change: default header %s value with %s",
else
{
}
}
else
{
if (MilterLogLevel > 8)
"Milter add: header: %s: %s",
}
}
/*
** MILTER_INSHEADER -- Insert the supplied header
**
** Parameters:
** m -- current filter.
** rlen -- length of response.
** e -- current envelope.
**
** Returns:
** none
**
** Notes:
** Unlike milter_addheader(), this does not attempt to determine
** if the header already exists in the envelope, even a
** deleted version. It just blindly inserts.
*/
static void
struct milter *m;
char *response;
ENVELOPE *e;
{
int mh_v_len;
sm_dprintf("milter_insheader: ");
/* sanity checks */
{
sm_dprintf("NULL response\n");
return;
}
{
sm_dprintf("didn't follow protocol (total len)\n");
return;
}
/* decode */
/* another sanity check */
{
sm_dprintf("didn't follow protocol (part len)\n");
return;
}
if (*field == '\0')
{
sm_dprintf("empty field name\n");
return;
}
/* add to e_msgsize */
if (MilterLogLevel > 8)
"Milter insert (%d): header: %s: %s",
mh_v_len = 0;
}
/*
** MILTER_CHANGEHEADER -- Change the supplied header in the message
**
** Parameters:
** m -- current filter.
** rlen -- length of response.
** e -- current envelope.
**
** Returns:
** none
*/
static void
struct milter *m;
char *response;
ENVELOPE *e;
{
int mh_v_len;
sm_dprintf("milter_changeheader: ");
/* sanity checks */
{
sm_dprintf("NULL response\n");
return;
}
{
sm_dprintf("didn't follow protocol (total len)\n");
return;
}
/* Find separating NUL */
/* another sanity check */
{
sm_dprintf("didn't follow protocol (part len)\n");
return;
}
if (*field == '\0')
{
sm_dprintf("empty field name\n");
return;
}
mh_v_len = 0;
{
{
{
break;
}
{
/*
** DRUMS msg-fmt draft says can only have
** multiple occurences of trace fields,
** so make sure we replace any non-trace,
** non-user field.
*/
sysheader = h;
}
}
}
/* if not found as user-provided header at index, use sysheader */
if (h == NULL)
h = sysheader;
if (h == NULL)
{
if (*val == '\0')
{
if (MilterLogLevel > 8)
"Milter delete (noop): header: %s"
, field);
}
else
{
/* treat modify value with no existing header as add */
if (MilterLogLevel > 8)
"Milter change (add): header: %s: %s"
}
return;
}
{
if (*val == '\0')
{
sm_dprintf("Delete%s %s:%s\n",
}
else
{
sm_dprintf("Change%s %s: from %s to %s\n",
mh_value);
}
}
if (MilterLogLevel > 8)
{
if (*val == '\0')
{
"Milter delete: header%s %s:%s",
}
else
{
"Milter change: header%s %s: from %s to %s",
mh_value);
}
}
{
size_t l;
if (l > e->e_msgsize)
e->e_msgsize = 0;
else
e->e_msgsize -= l;
/* rpool, don't free: sm_free(h->h_value); XXX */
}
if (*val == '\0')
{
/* Remove "Field: " from message size */
if (h != sysheader)
{
size_t l;
if (l > e->e_msgsize)
e->e_msgsize = 0;
else
e->e_msgsize -= l;
}
}
else
{
else
{
}
}
}
/*
** MILTER_SPLIT_RESPONSE -- Split response into fields.
**
** Parameters:
** response -- encoded repsonse.
** rlen -- length of response.
** pargc -- number of arguments (ouput)
**
** Returns:
** array of pointers to the individual strings
*/
static char **
char *response;
int *pargc;
{
char **s;
size_t i;
*pargc = 0;
{
sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
return NULL;
}
nelem = 0;
for (i = 0; i < rlen; i++)
{
if (response[i] == '\0')
++nelem;
}
if (nelem == 0)
return NULL;
/* last entry is only for the name */
if (s == NULL)
return NULL;
s[0] = response;
{
if (response[i] == '\0')
{
++elem;
if (i + 1 >= rlen)
else
}
}
{
}
/* overwrite last entry (already done above, just paranoia) */
return s;
}
/*
** MILTER_CHGFROM -- Change the envelope sender address
**
** Parameters:
** response -- encoded form of recipient address.
** rlen -- length of response.
** e -- current envelope.
**
** Returns:
** none
*/
static void
char *response;
ENVELOPE *e;
{
char **argv;
sm_dprintf("milter_chgfrom: ");
/* sanity checks */
{
sm_dprintf("NULL response\n");
return;
}
if (*response == '\0' ||
{
sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
return;
}
if (MilterLogLevel > 8)
{
return;
}
if (argc == 2)
{
/*
** need "features" here: how to get those? via e?
** "fake" it for now: allow everything.
*/
}
return;
}
/*
** MILTER_ADDRCPT_PAR -- Add the supplied recipient to the message
**
** Parameters:
** response -- encoded form of recipient address.
** rlen -- length of response.
** e -- current envelope.
**
** Returns:
** none
*/
static void
char *response;
ENVELOPE *e;
{
char *delimptr;
char **argv;
ADDRESS *a;
sm_dprintf("milter_addrcpt_par: ");
/* sanity checks */
{
sm_dprintf("NULL response\n");
return;
}
if (MilterLogLevel > 8)
{
return;
}
/* how to set ESMTP arguments? */
{
a = recipient(a, &e->e_sendqueue, 0, e);
else
sm_dprintf("olderrors=%d, Errors=%d\n",
}
else
{
sm_dprintf("a=%p, olderrors=%d, Errors=%d\n",
}
return;
}
/*
** MILTER_ADDRCPT -- Add the supplied recipient to the message
**
** Parameters:
** response -- encoded form of recipient address.
** rlen -- length of response.
** e -- current envelope.
**
** Returns:
** none
*/
static void
char *response;
ENVELOPE *e;
{
int olderrors;
sm_dprintf("milter_addrcpt: ");
/* sanity checks */
{
sm_dprintf("NULL response\n");
return;
}
if (*response == '\0' ||
{
sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
return;
}
if (MilterLogLevel > 8)
return;
}
/*
** MILTER_DELRCPT -- Delete the supplied recipient from the message
**
** Parameters:
** response -- encoded form of recipient address.
** rlen -- length of response.
** e -- current envelope.
**
** Returns:
** none
*/
static void
char *response;
ENVELOPE *e;
{
sm_dprintf("milter_delrcpt: ");
/* sanity checks */
{
sm_dprintf("NULL response\n");
return;
}
if (*response == '\0' ||
{
sm_dprintf("didn't follow protocol (total len %d != rlen %d)\n",
return;
}
if (MilterLogLevel > 8)
response);
return;
}
/*
** MILTER_REPLBODY -- Replace the current data file with new body
**
** Parameters:
** response -- encoded form of new body.
** rlen -- length of response.
** newfilter -- if first time called by a new filter
** e -- current envelope.
**
** Returns:
** 0 upon success, -1 upon failure
*/
static int
char *response;
bool newfilter;
ENVELOPE *e;
{
static char prevchar;
int i;
sm_dprintf("milter_replbody\n");
/* If a new filter, reset previous character and truncate data file */
if (newfilter)
{
char dfname[MAXPATHLEN];
sizeof(dfname));
/* Reset prevchar */
prevchar = '\0';
/* Get the current data file information */
if (prevsize < 0)
prevsize = 0;
/* truncate current data file */
{
{
MILTER_DF_ERROR("milter_replbody: sm_io truncate %s: %s");
return -1;
}
}
else
{
int err;
/*
** Clear error if tried to fflush()
** a read-only file pointer and
** there wasn't a previous error.
*/
if (err == 0)
sm_io_clearerr(e->e_dfp);
/* errno is set implicitly by fseek() before return */
0, SEEK_SET);
if (err < 0)
{
MILTER_DF_ERROR("milter_replbody: sm_io_seek %s: %s");
return -1;
}
# if NOFTRUNCATE
/* XXX: Not much we can do except rewind it */
MILTER_DF_ERROR("milter_replbody: ftruncate not available on this platform (%s:%s)");
return -1;
# else /* NOFTRUNCATE */
0);
if (err < 0)
{
MILTER_DF_ERROR("milter_replbody: sm_io ftruncate %s: %s");
return -1;
}
# endif /* NOFTRUNCATE */
}
e->e_msgsize = 0;
else
}
{
/* Flush the buffered '\r' */
if (prevchar == '\r')
{
e->e_msgsize++;
}
return 0;
}
for (i = 0; i < rlen; i++)
{
/* Buffered char from last chunk */
if (i == 0 && prevchar == '\r')
{
/* Not CRLF, output prevchar */
if (response[i] != '\n')
{
prevchar);
e->e_msgsize++;
}
prevchar = '\0';
}
/* Turn CRLF into LF */
if (response[i] == '\r')
{
/* check if at end of chunk */
if (i + 1 < rlen)
{
/* If LF, strip CR */
i++;
}
else
{
/* check next chunk */
prevchar = '\r';
continue;
}
}
e->e_msgsize++;
}
return 0;
}
/*
** MTA callouts
*/
/*
** MILTER_INIT -- open and negotiate with all of the filters
**
** Parameters:
** e -- current envelope.
** state -- return state from response.
** milters -- milters structure.
**
** Returns:
** true iff at least one filter is active
*/
/* ARGSUSED */
bool
ENVELOPE *e;
char *state;
{
int i;
sm_dprintf("milter_init\n");
*state = SMFIR_CONTINUE;
if (InputFilters[0] == NULL)
{
if (MilterLogLevel > 10)
"Milter: no active filter");
return false;
}
for (i = 0; InputFilters[i] != NULL; i++)
{
struct milter *m = InputFilters[i];
m->mf_sock = milter_open(m, false, e);
if (m->mf_state == SMFS_ERROR)
{
MILTER_CHECK_ERROR(true, continue);
break;
}
if (m->mf_sock < 0 ||
milter_negotiate(m, e, milters) < 0 ||
m->mf_state == SMFS_ERROR)
{
sm_dprintf("milter_init(%s): failed to %s\n",
m->mf_name,
m->mf_sock < 0 ? "open" :
"negotiate");
if (MilterLogLevel > 0)
"Milter (%s): init failed to %s",
m->mf_name,
m->mf_sock < 0 ? "open" :
"negotiate");
/* if negotation failure, close socket */
milter_error(m, e);
MILTER_CHECK_ERROR(true, continue);
continue;
}
if (MilterLogLevel > 9)
"Milter (%s): init success to %s",
m->mf_name,
}
/*
** we won't be using any of them, so clear any existing
** connections.
*/
if (*state != SMFIR_CONTINUE)
milter_quit(e);
return true;
}
/*
** MILTER_CONNECT -- send connection info to milter filters
**
** Parameters:
** hostname -- hostname of remote machine.
** addr -- address of remote machine.
** e -- current envelope.
** state -- return state from response.
**
** Returns:
** response string (may be NULL)
*/
char *
char *hostname;
ENVELOPE *e;
char *state;
{
char family;
unsigned short port;
char *response;
ssize_t s;
# if NETINET6
char buf6[INET6_ADDRSTRLEN];
# endif /* NETINET6 */
if (MilterLogLevel > 9)
/* gather data */
{
# if NETUNIX
case AF_UNIX:
family = SMFIA_UNIX;
break;
# endif /* NETUNIX */
# if NETINET
case AF_INET:
family = SMFIA_INET;
break;
# endif /* NETINET */
# if NETINET6
case AF_INET6:
family = SMFIA_INET;
else
sizeof(buf6));
sockinfo = "";
break;
# endif /* NETINET6 */
default:
break;
}
if (family != SMFIA_UNKNOWN)
/* put together data */
*bp++ = '\0';
if (family != SMFIA_UNKNOWN)
{
/* include trailing '\0' */
}
e, state, "connect", false);
/*
** If this message connection is done for,
** close the filters.
*/
if (*state != SMFIR_CONTINUE)
{
if (MilterLogLevel > 9)
milter_quit(e);
}
else
/*
** SMFIR_REPLYCODE can't work with connect due to
** the requirements of SMTP. Therefore, ignore the
** reply code text but keep the state it would reflect.
*/
if (*state == SMFIR_REPLYCODE)
{
*response == '4')
{
*state = SMFIR_SHUTDOWN;
else
*state = SMFIR_TEMPFAIL;
}
else
*state = SMFIR_REJECT;
{
}
}
return response;
}
/*
**
** Parameters:
** e -- current envelope.
** state -- return state from response.
**
** Returns:
** response string (may be NULL)
*/
char *
char *helo;
ENVELOPE *e;
char *state;
{
int i;
char *response;
for (i = 0; InputFilters[i] != NULL; i++)
{
struct milter *m = InputFilters[i];
switch (m->mf_state)
{
case SMFS_INMSG:
/* abort in message filters */
milter_abort_filter(m, e);
/* FALLTHROUGH */
case SMFS_DONE:
/* reset done filters */
break;
}
}
return response;
}
/*
** MILTER_ENVFROM -- send SMTP MAIL command info to milter filters
**
** Parameters:
** args -- SMTP MAIL command args (args[0] == sender).
** e -- current envelope.
** state -- return state from response.
**
** Returns:
** response string (may be NULL)
*/
char *
char **args;
ENVELOPE *e;
char *state;
{
int i;
char *response;
ssize_t s;
{
sm_dprintf("milter_envfrom:");
sm_dprintf("\n");
}
/* sanity check */
{
*state = SMFIR_REJECT;
if (MilterLogLevel > 10)
"Milter: reject, no sender");
return NULL;
}
/* new message, so ... */
for (i = 0; InputFilters[i] != NULL; i++)
{
struct milter *m = InputFilters[i];
switch (m->mf_state)
{
case SMFS_INMSG:
/* abort in message filters */
milter_abort_filter(m, e);
/* FALLTHROUGH */
case SMFS_DONE:
/* reset done filters */
break;
}
}
/* put together data */
s = 0;
if (s < 0)
{
*state = SMFIR_TEMPFAIL;
return NULL;
}
{
}
if (MilterLogLevel > 14)
/* send it over */
e, state, "mail", false);
/*
** abort the other filters since we are done with the
** current message.
*/
return response;
}
/*
** MILTER_ENVRCPT -- send SMTP RCPT command info to milter filters
**
** Parameters:
** args -- SMTP MAIL command args (args[0] == recipient).
** e -- current envelope.
** state -- return state from response.
** rcpt_error -- does RCPT have an error?
**
** Returns:
** response string (may be NULL)
*/
char *
char **args;
ENVELOPE *e;
char *state;
bool rcpt_error;
{
int i;
char *response;
ssize_t s;
{
sm_dprintf("milter_envrcpt:");
sm_dprintf("\n");
}
/* sanity check */
{
*state = SMFIR_REJECT;
if (MilterLogLevel > 10)
return NULL;
}
/* put together data */
s = 0;
if (s < 0)
{
*state = SMFIR_TEMPFAIL;
return NULL;
}
{
}
if (MilterLogLevel > 14)
/* send it over */
return response;
}
/*
** MILTER_DATA_CMD -- send SMTP DATA command info to milter filters
**
** Parameters:
** e -- current envelope.
** state -- return state from response.
**
** Returns:
** response string (may be NULL)
*/
char *
milter_data_cmd(e, state)
ENVELOPE *e;
char *state;
{
sm_dprintf("milter_data_cmd\n");
/* send it over */
"data", false);
}
/*
**
** Parameters:
** e -- current envelope.
** state -- return state from response.
**
** Returns:
** response string (may be NULL)
**
** Side effects:
** - Uses e->e_dfp for access to the body
** - Can call the various milter action routines to
** modify the envelope or message.
*/
# define MILTER_CHECK_RESULTS() \
if (*state == SMFIR_ACCEPT || \
m->mf_state == SMFS_ERROR) \
{ \
if (m->mf_state != SMFS_ERROR) \
continue; /* to next filter */ \
} \
if (*state != SMFIR_CONTINUE) \
{ \
goto finishup; \
}
char *
milter_data(e, state)
ENVELOPE *e;
char *state;
{
bool replbody = false; /* milter_replbody() called? */
bool replfailed = false; /* milter_replbody() failed? */
bool rewind = false; /* rewind data file? */
bool dfopen = false; /* data file open for writing? */
bool newfilter; /* reset on each new filter */
char rcmd;
int i;
int save_errno;
sm_dprintf("milter_data\n");
*state = SMFIR_CONTINUE;
/*
** XXX: Should actually send body chunks to each filter
** a chunk at a time instead of sending the whole body to
** each filter in turn. However, only if the filters don't
** change the body.
*/
for (i = 0; InputFilters[i] != NULL; i++)
{
struct milter *m = InputFilters[i];
if (*state != SMFIR_CONTINUE &&
*state != SMFIR_ACCEPT)
{
/*
** A previous filter has dealt with the message,
** safe to stop processing the filters.
*/
break;
}
/* Now reset state for later evaluation */
*state = SMFIR_CONTINUE;
newfilter = true;
/* previous problem? */
if (m->mf_state == SMFS_ERROR)
{
MILTER_CHECK_ERROR(false, continue);
break;
}
/* sanity checks */
if (m->mf_sock < 0 ||
continue;
m->mf_state = SMFS_INMSG;
/* check if filter wants the headers */
{
}
/* check if filter wants EOH */
{
sm_dprintf("milter_data: eoh\n");
if (MilterEOHMacros[0] != NULL)
{
SMFIC_EOH, e);
}
/* send it over */
e, state, "eoh");
}
/* check if filter wants the body */
{
rewind = true;
}
if (MilterEOMMacros[0] != NULL)
{
SMFIC_BODYEOB, e);
}
/* send the final body chunk */
/* Get time EOM sent for timeout */
/* deal with the possibility of multiple responses */
while (*state == SMFIR_CONTINUE)
{
if (m->mf_timeout[SMFTO_EOM] > 0 &&
{
sm_dprintf("milter_data(%s): EOM ACK/NAK timeout\n",
m->mf_name);
if (MilterLogLevel > 0)
m->mf_name);
milter_error(m, e);
MILTER_CHECK_ERROR(false, break);
break;
}
m->mf_timeout[SMFTO_READ], e,
"body");
if (m->mf_state == SMFS_ERROR)
break;
sm_dprintf("milter_data(%s): state %c\n",
switch (rcmd)
{
case SMFIR_REPLYCODE:
MILTER_CHECK_REPLYCODE("554 5.7.1 Command rejected");
if (MilterLogLevel > 12)
break;
case SMFIR_REJECT: /* log msg at end of function */
if (MilterLogLevel > 12)
m->mf_name);
break;
case SMFIR_DISCARD:
if (MilterLogLevel > 12)
m->mf_name);
break;
case SMFIR_TEMPFAIL:
if (MilterLogLevel > 12)
m->mf_name);
break;
case SMFIR_CONTINUE:
case SMFIR_ACCEPT:
/* this filter is done with message */
if (replfailed)
*state = SMFIR_TEMPFAIL;
else
*state = SMFIR_ACCEPT;
break;
case SMFIR_PROGRESS:
break;
case SMFIR_QUARANTINE:
{
if (MilterLogLevel > 9)
"milter_data(%s): lied about quarantining, honoring request anyway",
m->mf_name);
}
if (MilterLogLevel > 3)
"milter=%s, quarantine=%s",
response);
break;
case SMFIR_ADDHEADER:
{
if (MilterLogLevel > 9)
"milter_data(%s): lied about adding headers, honoring request anyway",
m->mf_name);
}
break;
case SMFIR_INSHEADER:
{
if (MilterLogLevel > 9)
"milter_data(%s): lied about adding headers, honoring request anyway",
m->mf_name);
}
break;
case SMFIR_CHGHEADER:
{
if (MilterLogLevel > 9)
"milter_data(%s): lied about changing headers, honoring request anyway",
m->mf_name);
}
break;
case SMFIR_CHGFROM:
{
if (MilterLogLevel > 9)
"milter_data(%s) lied about changing sender, honoring request anyway",
m->mf_name);
}
break;
case SMFIR_ADDRCPT:
{
if (MilterLogLevel > 9)
"milter_data(%s) lied about adding recipients, honoring request anyway",
m->mf_name);
}
break;
case SMFIR_ADDRCPT_PAR:
{
if (MilterLogLevel > 9)
"milter_data(%s) lied about adding recipients with parameters, honoring request anyway",
m->mf_name);
}
break;
case SMFIR_DELRCPT:
{
if (MilterLogLevel > 9)
"milter_data(%s): lied about removing recipients, honoring request anyway",
m->mf_name);
}
break;
case SMFIR_REPLBODY:
{
if (MilterLogLevel > 0)
"milter_data(%s): lied about replacing body, rejecting request and tempfailing message",
m->mf_name);
replfailed = true;
break;
}
/* already failed in attempt */
if (replfailed)
break;
if (!dfopen)
{
if (milter_reopen_df(e) < 0)
{
replfailed = true;
break;
}
dfopen = true;
rewind = true;
}
newfilter, e) < 0)
replfailed = true;
newfilter = false;
replbody = true;
break;
default:
/* Invalid response to command */
if (MilterLogLevel > 0)
"milter_data(%s): returned bogus response %c",
milter_error(m, e);
break;
}
{
}
if (m->mf_state == SMFS_ERROR)
break;
}
if (replbody && !replfailed)
{
/* flush possible buffered character */
replbody = false;
}
if (m->mf_state == SMFS_ERROR)
{
MILTER_CHECK_ERROR(false, continue);
goto finishup;
}
}
/* leave things in the expected state if we touched it */
if (replfailed)
{
if (*state == SMFIR_CONTINUE ||
*state == SMFIR_ACCEPT)
{
*state = SMFIR_TEMPFAIL;
}
if (dfopen)
{
dfopen = false;
}
rewind = false;
}
if ((dfopen && milter_reset_df(e) < 0) ||
{
save_errno = errno;
/*
** If filter told us to keep message but we had
** an error, we can't really keep it, tempfail it.
*/
if (*state == SMFIR_CONTINUE ||
*state == SMFIR_ACCEPT)
{
*state = SMFIR_TEMPFAIL;
}
errno = save_errno;
syserr("milter_data: %s/%cf%s: read error",
DATAFL_LETTER, e->e_id);
}
return response;
}
/*
** MILTER_UNKNOWN -- send any unrecognized or unimplemented command
** string to milter filters
**
** Parameters:
** smtpcmd -- the string itself.
** e -- current envelope.
** state -- return state from response.
**
**
** Returns:
** response string (may be NULL)
*/
char *
char *smtpcmd;
ENVELOPE *e;
char *state;
{
}
/*
** MILTER_QUIT -- informs the filter(s) we are done and closes connection(s)
**
** Parameters:
** e -- current envelope.
**
** Returns:
** none
*/
void
milter_quit(e)
ENVELOPE *e;
{
int i;
for (i = 0; InputFilters[i] != NULL; i++)
milter_quit_filter(InputFilters[i], e);
}
/*
** MILTER_ABORT -- informs the filter(s) that we are aborting current message
**
** Parameters:
** e -- current envelope.
**
** Returns:
** none
*/
void
milter_abort(e)
ENVELOPE *e;
{
int i;
sm_dprintf("milter_abort\n");
for (i = 0; InputFilters[i] != NULL; i++)
{
struct milter *m = InputFilters[i];
/* sanity checks */
continue;
milter_abort_filter(m, e);
}
}
#endif /* MILTER */