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|
/*-
* Copyright 2017 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include "milter.h"
#include "milter_internal.h"
#include "email_addr.h"
#include "addr.h"
#include "unix-std.h"
#include "logger.h"
#include "ottery.h"
#include "libutil/http.h"
#include "libutil/http_private.h"
#include "libserver/protocol_internal.h"
#include "utlist.h"
#define msg_err_milter(...) rspamd_default_log_function(G_LOG_LEVEL_CRITICAL, \
"milter", priv->uid, \
G_STRFUNC, \
__VA_ARGS__)
#define msg_warn_milter(...) rspamd_default_log_function (G_LOG_LEVEL_WARNING, \
"milter", priv->uid, \
G_STRFUNC, \
__VA_ARGS__)
#define msg_info_milter(...) rspamd_default_log_function (G_LOG_LEVEL_INFO, \
"milter", priv->uid, \
G_STRFUNC, \
__VA_ARGS__)
#define msg_debug_milter(...) rspamd_default_log_function (G_LOG_LEVEL_DEBUG, \
"milter", priv->uid, \
G_STRFUNC, \
__VA_ARGS__)
static gboolean rspamd_milter_handle_session (
struct rspamd_milter_session *session,
struct rspamd_milter_private *priv);
static GQuark
rspamd_milter_quark (void)
{
return g_quark_from_static_string ("milter");
}
static void
rspamd_milter_obuf_free (struct rspamd_milter_outbuf *obuf)
{
if (obuf) {
if (obuf->buf) {
rspamd_fstring_free (obuf->buf);
}
g_free (obuf);
}
}
#define RSPAMD_MILTER_RESET_COMMON (1 << 0)
#define RSPAMD_MILTER_RESET_OUT (1 << 1)
#define RSPAMD_MILTER_RESET_ADDR (1 << 2)
#define RSPAMD_MILTER_RESET_MACRO (1 << 3)
#define RSPAMD_MILTER_RESET_ALL (RSPAMD_MILTER_RESET_COMMON | \
RSPAMD_MILTER_RESET_OUT | \
RSPAMD_MILTER_RESET_ADDR | \
RSPAMD_MILTER_RESET_MACRO)
#define RSPAMD_MILTER_RESET_QUIT_NC (RSPAMD_MILTER_RESET_COMMON | \
RSPAMD_MILTER_RESET_ADDR | \
RSPAMD_MILTER_RESET_MACRO)
#define RSPAMD_MILTER_RESET_ABORT (RSPAMD_MILTER_RESET_COMMON)
static void
rspamd_milter_session_reset (struct rspamd_milter_session *session,
guint how)
{
struct rspamd_milter_outbuf *obuf, *obuf_tmp;
struct rspamd_milter_private *priv = session->priv;
struct rspamd_email_address *cur;
guint i;
if (how & RSPAMD_MILTER_RESET_OUT) {
DL_FOREACH_SAFE (priv->out_chain, obuf, obuf_tmp) {
rspamd_milter_obuf_free (obuf);
}
priv->out_chain = NULL;
}
if (how & RSPAMD_MILTER_RESET_COMMON) {
if (priv->parser.buf) {
priv->parser.buf->len = 0;
}
if (session->message) {
session->message->len = 0;
}
if (session->rcpts) {
PTR_ARRAY_FOREACH (session->rcpts, i, cur) {
rspamd_email_address_unref (cur);
}
g_ptr_array_free (session->rcpts, TRUE);
session->rcpts = NULL;
}
if (session->from) {
rspamd_email_address_unref (session->from);
session->from = NULL;
}
if (session->helo) {
session->helo->len = 0;
}
if (session->hostname) {
session->hostname->len = 0;
}
}
if (how & RSPAMD_MILTER_RESET_ADDR) {
if (session->addr) {
rspamd_inet_address_free (session->addr);
session->addr = NULL;
}
}
if (how & RSPAMD_MILTER_RESET_MACRO) {
if (session->macros) {
g_hash_table_unref (session->macros);
session->macros = NULL;
}
}
}
static void
rspamd_milter_session_dtor (struct rspamd_milter_session *session)
{
struct rspamd_milter_private *priv;
if (session) {
priv = session->priv;
if (event_get_base (&priv->ev)) {
event_del (&priv->ev);
}
rspamd_milter_session_reset (session, RSPAMD_MILTER_RESET_ALL);
if (priv->parser.buf) {
rspamd_fstring_free (priv->parser.buf);
}
if (session->message) {
rspamd_fstring_free (session->message);
}
if (session->helo) {
rspamd_fstring_free (session->helo);
}
if (session->hostname) {
rspamd_fstring_free (session->hostname);
}
if (priv->fd) {
close (priv->fd);
}
g_free (session);
}
}
static void
rspamd_milter_on_protocol_error (struct rspamd_milter_session *session,
struct rspamd_milter_private *priv, GError *err)
{
priv->state = RSPAMD_MILTER_WANNA_DIE;
REF_RETAIN (session);
priv->err_cb (priv->fd, session, priv->ud, err);
REF_RELEASE (session);
g_error_free (err);
}
static void
rspamd_milter_io_handler (gint fd, gshort what, void *ud)
{
struct rspamd_milter_session *session = ud;
struct rspamd_milter_private *priv;
GError *err;
priv = session->priv;
if (what == EV_TIMEOUT) {
msg_debug_milter ("connection timed out");
err = g_error_new (rspamd_milter_quark (), ETIMEDOUT, "connection "
"timed out");
rspamd_milter_on_protocol_error (session, priv, err);
}
else {
rspamd_milter_handle_session (session, priv);
}
}
static inline void
rspamd_milter_plan_io (struct rspamd_milter_session *session,
struct rspamd_milter_private *priv, gshort what)
{
if (event_get_base (&priv->ev)) {
event_del (&priv->ev);
}
event_set (&priv->ev, priv->fd, what, rspamd_milter_io_handler,
session);
event_base_set (priv->ev_base, &priv->ev);
event_add (&priv->ev, priv->ptv);
}
#define READ_INT_32(pos, var) do { \
memcpy (&(var), (pos), sizeof (var)); \
(pos) += sizeof (var); \
(var) = ntohl (var); \
} while (0)
#define READ_INT_16(pos, var) do { \
memcpy (&(var), (pos), sizeof (var)); \
(pos) += sizeof (var); \
(var) = ntohs (var); \
} while (0)
static gboolean
rspamd_milter_process_command (struct rspamd_milter_session *session,
struct rspamd_milter_private *priv)
{
GError *err;
rspamd_fstring_t *buf;
const guchar *pos, *end, *zero;
guint cmdlen;
guint32 version, actions, protocol;
buf = priv->parser.buf;
pos = buf->str + priv->parser.cmd_start;
cmdlen = priv->parser.datalen;
end = pos + cmdlen;
switch (priv->parser.cur_cmd) {
case RSPAMD_MILTER_CMD_ABORT:
msg_debug_milter ("got abort command");
rspamd_milter_session_reset (session, RSPAMD_MILTER_RESET_ABORT);
break;
case RSPAMD_MILTER_CMD_BODY:
if (!session->message) {
session->message = rspamd_fstring_sized_new (
RSPAMD_MILTER_MESSAGE_CHUNK);
}
msg_debug_milter ("got body chunk: %d bytes", (int)cmdlen);
session->message = rspamd_fstring_append (session->message,
pos, cmdlen);
break;
case RSPAMD_MILTER_CMD_CONNECT:
msg_debug_milter ("got connect command");
/*
* char hostname[]: Hostname, NUL terminated
* char family: Protocol family
* uint16 port: Port number (SMFIA_INET or SMFIA_INET6 only)
* char address[]: IP address (ASCII) or unix socket path, NUL terminated
*/
zero = memchr (pos, '\0', cmdlen);
if (zero == NULL || zero > (end - sizeof (guint16) + 1)) {
err = g_error_new (rspamd_milter_quark (), EINVAL, "invalid "
"connect command (no name)");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
else {
guchar proto;
guint16 port;
if (session->hostname == NULL) {
session->hostname = rspamd_fstring_new_init (pos, zero - pos);
}
else {
session->hostname = rspamd_fstring_assign (session->hostname,
pos, zero - pos);
}
pos = zero + 1;
proto = *pos ++;
if (proto == RSPAMD_MILTER_CONN_UNKNOWN) {
/* We have no information about host */
msg_debug_milter ("unknown connect address");
}
else {
READ_INT_16 (pos, port);
if (pos >= end) {
/* No IP somehow */
msg_debug_milter ("unknown connect IP/socket");
}
else {
zero = memchr (pos, '\0', end - pos);
if (zero == NULL) {
err = g_error_new (rspamd_milter_quark (), EINVAL, "invalid "
"connect command (no zero terminated IP)");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
switch (proto) {
case RSPAMD_MILTER_CONN_UNIX:
session->addr = rspamd_inet_address_new (AF_UNIX,
pos);
break;
case RSPAMD_MILTER_CONN_INET:
session->addr = rspamd_inet_address_new (AF_INET, NULL);
if (!rspamd_parse_inet_address_ip (pos, zero - pos,
session->addr)) {
err = g_error_new (rspamd_milter_quark (), EINVAL,
"invalid connect command (bad IPv4)");
rspamd_milter_on_protocol_error (session, priv,
err);
return FALSE;
}
rspamd_inet_address_set_port (session->addr, port);
break;
case RSPAMD_MILTER_CONN_INET6:
session->addr = rspamd_inet_address_new (AF_INET, NULL);
if (!rspamd_parse_inet_address_ip (pos, zero - pos,
session->addr)) {
err = g_error_new (rspamd_milter_quark (), EINVAL,
"invalid connect command (bad IPv6)");
rspamd_milter_on_protocol_error (session, priv,
err);
return FALSE;
}
rspamd_inet_address_set_port (session->addr, port);
break;
default:
err = g_error_new (rspamd_milter_quark (), EINVAL,
"invalid connect command (bad protocol: %c)",
proto);
rspamd_milter_on_protocol_error (session, priv,
err);
return FALSE;
}
}
}
msg_info_milter ("got connection from %s",
rspamd_inet_address_to_string_pretty (session->addr));
}
break;
case RSPAMD_MILTER_CMD_MACRO:
msg_debug_milter ("got macro command");
/*
* Format is
* 1 byte - command associated (we don't care about it)
* 0-terminated name
* 0-terminated value
* ...
*/
if (session->macros == NULL) {
session->macros = g_hash_table_new_full (rspamd_ftok_icase_hash,
rspamd_ftok_icase_equal,
rspamd_fstring_mapped_ftok_free,
rspamd_fstring_mapped_ftok_free);
}
/* Ignore one byte */
pos ++;
while (pos < end) {
zero = memchr (pos, '\0', cmdlen);
if (zero == NULL) {
err = g_error_new (rspamd_milter_quark (), EINVAL, "invalid "
"macro command (no name)");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
else {
rspamd_fstring_t *name, *value;
rspamd_ftok_t *name_tok, *value_tok;
const guchar *zero_val;
zero_val = memchr (zero + 1, '\0', cmdlen);
if (end > zero_val) {
name = rspamd_fstring_new_init (pos, zero - pos);
value = rspamd_fstring_new_init (zero + 1,
zero_val - zero - 1);
name_tok = rspamd_ftok_map (name);
value_tok = rspamd_ftok_map (value);
g_hash_table_replace (session->macros, name_tok, value_tok);
msg_debug_milter ("got macro: %T -> %T",
name_tok, value_tok);
if (rspamd_ftok_cstr_equal (name_tok, "{mail_host}", FALSE)) {
session->hostname = rspamd_fstring_assign (session->hostname,
value_tok->begin, value_tok->len);
}
cmdlen -= zero_val - pos;
pos = zero_val + 1;
}
else {
err = g_error_new (rspamd_milter_quark (), EINVAL,
"invalid macro command (bad value)");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
}
}
break;
case RSPAMD_MILTER_CMD_BODYEOB:
msg_debug_milter ("got eob command");
REF_RETAIN (session);
priv->fin_cb (priv->fd, session, priv->ud);
REF_RELEASE (session);
break;
case RSPAMD_MILTER_CMD_HELO:
msg_debug_milter ("got helo command");
if (end > pos && *(end - 1) == '\0') {
if (session->helo == NULL) {
session->helo = rspamd_fstring_new_init (pos, cmdlen - 1);
}
else {
session->helo = rspamd_fstring_assign (session->helo,
pos, cmdlen - 1);
}
}
else if (end > pos) {
/* Should not happen */
if (session->helo == NULL) {
session->helo = rspamd_fstring_new_init (pos, cmdlen);
}
else {
session->helo = rspamd_fstring_assign (session->helo,
pos, cmdlen);
}
}
msg_debug_milter ("got helo value: %V", session->helo);
break;
case RSPAMD_MILTER_CMD_QUIT_NC:
/* We need to reset session and start over */
msg_debug_milter ("got quit_nc command");
rspamd_milter_session_reset (session, RSPAMD_MILTER_RESET_QUIT_NC);
break;
case RSPAMD_MILTER_CMD_HEADER:
msg_debug_milter ("got header command");
zero = memchr (pos, '\0', cmdlen);
if (zero == NULL) {
err = g_error_new (rspamd_milter_quark (), EINVAL, "invalid "
"header command (no name)");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
else {
if (end > zero && *(end - 1) == '\0') {
rspamd_printf_fstring (&session->message, "%*s: %*s\r\n",
(int)(zero - pos), pos,
(int)(end - zero - 2), zero + 1);
}
else {
err = g_error_new (rspamd_milter_quark (), EINVAL, "invalid "
"header command (bad value)");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
}
break;
case RSPAMD_MILTER_CMD_MAIL:
msg_debug_milter ("mail command");
while (pos < end) {
zero = memchr (pos, '\0', end - pos);
struct rspamd_email_address *addr;
if (zero) {
msg_debug_milter ("got mail: %*s", (int)(zero - pos), pos);
addr = rspamd_email_address_from_smtp (pos, zero - pos);
if (addr) {
session->from = addr;
}
/* TODO: parse esmtp arguments */
break;
}
else {
msg_debug_milter ("got weird from: %*s", (int)(end - pos),
pos);
/* That actually should not happen */
addr = rspamd_email_address_from_smtp (pos, end - pos);
if (addr) {
session->from = addr;
}
break;
}
}
break;
case RSPAMD_MILTER_CMD_EOH:
msg_debug_milter ("got eoh command");
if (!session->message) {
session->message = rspamd_fstring_sized_new (
RSPAMD_MILTER_MESSAGE_CHUNK);
}
session->message = rspamd_fstring_append (session->message,
"\r\n", 2);
break;
case RSPAMD_MILTER_CMD_OPTNEG:
if (cmdlen != sizeof (guint32) * 3) {
err = g_error_new (rspamd_milter_quark (), EINVAL, "invalid "
"optneg command");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
READ_INT_32 (pos, version);
READ_INT_32 (pos, actions);
READ_INT_32 (pos, protocol);
msg_debug_milter ("optneg: version: %d, actions: %d, protocol: %d",
version, actions, protocol);
if (version < RSPAMD_MILTER_PROTO_VER) {
msg_warn_milter ("MTA specifies too old protocol: %d, "
"aborting connnection", version);
err = g_error_new (rspamd_milter_quark (), EINVAL, "invalid "
"protocol version: %d", version);
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
version = RSPAMD_MILTER_PROTO_VER;
actions |= RSPAMD_MILTER_ACTIONS_MASK;
protocol = RSPAMD_MILTER_FLAG_NOREPLY_MASK;
return rspamd_milter_send_action (session, RSPAMD_MILTER_OPTNEG,
version, actions, protocol);
break;
case RSPAMD_MILTER_CMD_QUIT:
msg_debug_milter ("quit command");
priv->state = RSPAMD_MILTER_WANNA_DIE;
REF_RELEASE (session);
break;
case RSPAMD_MILTER_CMD_RCPT:
msg_debug_milter ("rcpt command");
while (pos < end) {
zero = memchr (pos, '\0', end - pos);
struct rspamd_email_address *addr;
if (zero) {
msg_debug_milter ("got rcpt: %*s", (int)(zero - pos), pos);
addr = rspamd_email_address_from_smtp (pos, zero - pos);
if (addr) {
if (!session->rcpts) {
session->rcpts = g_ptr_array_sized_new (1);
}
g_ptr_array_add (session->rcpts, addr);
}
pos = zero + 1;
}
else {
msg_debug_milter ("got weird rcpt: %*s", (int)(end - pos),
pos);
/* That actually should not happen */
addr = rspamd_email_address_from_smtp (pos, end - pos);
if (addr) {
if (!session->rcpts) {
session->rcpts = g_ptr_array_sized_new (1);
}
g_ptr_array_add (session->rcpts, addr);
}
break;
}
}
break;
case RSPAMD_MILTER_CMD_DATA:
if (!session->message) {
session->message = rspamd_fstring_sized_new (
RSPAMD_MILTER_MESSAGE_CHUNK);
}
msg_debug_milter ("got data command");
/* We do not need reply as specified */
break;
default:
msg_debug_milter ("got bad command: %c", priv->parser.cur_cmd);
break;
}
return TRUE;
}
static gboolean
rspamd_milter_is_valid_cmd (guchar c)
{
switch (c) {
case RSPAMD_MILTER_CMD_ABORT:
case RSPAMD_MILTER_CMD_BODY:
case RSPAMD_MILTER_CMD_CONNECT:
case RSPAMD_MILTER_CMD_MACRO:
case RSPAMD_MILTER_CMD_BODYEOB:
case RSPAMD_MILTER_CMD_HELO:
case RSPAMD_MILTER_CMD_QUIT_NC:
case RSPAMD_MILTER_CMD_HEADER:
case RSPAMD_MILTER_CMD_MAIL:
case RSPAMD_MILTER_CMD_EOH:
case RSPAMD_MILTER_CMD_OPTNEG:
case RSPAMD_MILTER_CMD_QUIT:
case RSPAMD_MILTER_CMD_RCPT:
case RSPAMD_MILTER_CMD_DATA:
case RSPAMD_MILTER_CMD_UNKNOWN:
return TRUE;
default:
break;
}
return FALSE;
}
static gboolean
rspamd_milter_consume_input (struct rspamd_milter_session *session,
struct rspamd_milter_private *priv)
{
const guchar *p, *end;
GError *err;
p = priv->parser.buf->str + priv->parser.pos;
end = priv->parser.buf->str + priv->parser.buf->len;
while (p < end) {
switch (priv->parser.state) {
case st_len_1:
/* The first length byte in big endian order */
priv->parser.datalen = 0;
priv->parser.datalen |= *p << 24;
priv->parser.state = st_len_2;
p++;
break;
case st_len_2:
/* The second length byte in big endian order */
priv->parser.datalen |= *p << 16;
priv->parser.state = st_len_3;
p++;
break;
case st_len_3:
/* The third length byte in big endian order */
priv->parser.datalen |= *p << 8;
priv->parser.state = st_len_4;
p++;
break;
case st_len_4:
/* The fourth length byte in big endian order */
priv->parser.datalen |= *p;
priv->parser.state = st_read_cmd;
p++;
break;
case st_read_cmd:
priv->parser.cur_cmd = *p;
priv->parser.state = st_read_data;
if (priv->parser.datalen < 1) {
err = g_error_new (rspamd_milter_quark (), EINVAL,
"Command length is too short");
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
else {
/* Eat command itself */
priv->parser.datalen --;
}
p++;
priv->parser.cmd_start = p - (const guchar *)priv->parser.buf->str;
break;
case st_read_data:
/* We might need some more data in buffer for further steps */
if (priv->parser.datalen >
RSPAMD_MILTER_MESSAGE_CHUNK * 2) {
err = g_error_new (rspamd_milter_quark (), E2BIG,
"Command length is too big: %zd",
priv->parser.datalen);
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
if (!rspamd_milter_is_valid_cmd (priv->parser.cur_cmd)) {
err = g_error_new (rspamd_milter_quark (), E2BIG,
"Unvalid command: %c",
priv->parser.cur_cmd);
rspamd_milter_on_protocol_error (session, priv, err);
return FALSE;
}
if (priv->parser.buf->allocated < priv->parser.datalen) {
priv->parser.buf = rspamd_fstring_grow (priv->parser.buf,
priv->parser.pos + priv->parser.datalen);
/* This can realloc buffer */
p = priv->parser.buf->str + priv->parser.pos;
rspamd_milter_plan_io (session, priv, EV_READ);
goto end;
}
else {
/* We may have the full command available */
if (p + priv->parser.datalen <= end) {
/* We can process command */
if (!rspamd_milter_process_command (session, priv)) {
return FALSE;
}
p += priv->parser.datalen;
priv->parser.state = st_len_1;
priv->parser.cur_cmd = '\0';
priv->parser.cmd_start = 0;
}
else {
/* Need to read more */
rspamd_milter_plan_io (session, priv, EV_READ);
goto end;
}
}
break;
}
}
end:
priv->parser.pos = p - (const guchar *)priv->parser.buf->str;
return TRUE;
}
static gboolean
rspamd_milter_handle_session (struct rspamd_milter_session *session,
struct rspamd_milter_private *priv)
{
struct rspamd_milter_outbuf *obuf, *obuf_tmp;
gssize r, to_write;
GError *err;
g_assert (session != NULL);
switch (priv->state) {
case RSPAMD_MILTER_READ_MORE:
if (priv->parser.buf->len >= priv->parser.buf->allocated) {
priv->parser.buf = rspamd_fstring_grow (priv->parser.buf,
priv->parser.buf->len * 2);
}
r = read (priv->fd, priv->parser.buf->str + priv->parser.buf->len,
priv->parser.buf->allocated - priv->parser.buf->len);
if (r == -1) {
if (errno == EAGAIN || errno == EINTR) {
rspamd_milter_plan_io (session, priv, EV_READ);
}
else {
/* Fatal IO error */
err = g_error_new (rspamd_milter_quark (), errno,
"IO read error: %s", strerror (errno));
REF_RETAIN (session);
priv->err_cb (priv->fd, session, priv->ud, err);
REF_RELEASE (session);
g_error_free (err);
}
}
else if (r == 0) {
err = g_error_new (rspamd_milter_quark (), ECONNRESET,
"Unexpected EOF");
REF_RETAIN (session);
priv->err_cb (priv->fd, session, priv->ud, err);
REF_RELEASE (session);
g_error_free (err);
}
else {
priv->parser.buf->len += r;
return rspamd_milter_consume_input (session, priv);
}
case RSPAMD_MILTER_WRITE_REPLY:
if (priv->out_chain == NULL) {
/* We have written everything, so we can read something */
priv->state = RSPAMD_MILTER_READ_MORE;
rspamd_milter_plan_io (session, priv, EV_READ);
}
else {
DL_FOREACH_SAFE (priv->out_chain, obuf, obuf_tmp) {
to_write = obuf->buf->len - obuf->pos;
g_assert (to_write > 0);
r = write (priv->fd, obuf->buf->str + obuf->pos, to_write);
if (r == -1) {
if (errno == EAGAIN || errno == EINTR) {
rspamd_milter_plan_io (session, priv, EV_WRITE);
}
else {
/* Fatal IO error */
err = g_error_new (rspamd_milter_quark (), errno,
"IO write error: %s", strerror (errno));
REF_RETAIN (session);
priv->err_cb (priv->fd, session, priv->ud, err);
REF_RELEASE (session);
g_error_free (err);
}
}
else if (r == 0) {
err = g_error_new (rspamd_milter_quark (), ECONNRESET,
"Unexpected EOF");
REF_RETAIN (session);
priv->err_cb (priv->fd, session, priv->ud, err);
REF_RELEASE (session);
g_error_free (err);
}
else {
if (r == to_write) {
/* We have done with this buf */
DL_DELETE (priv->out_chain, obuf);
rspamd_milter_obuf_free (obuf);
}
else {
/* We need to plan another write */
obuf->pos += r;
rspamd_milter_plan_io (session, priv, EV_WRITE);
return TRUE;
}
}
}
/* Here we have written everything, so we can plan reading */
priv->state = RSPAMD_MILTER_READ_MORE;
rspamd_milter_plan_io (session, priv, EV_READ);
}
break;
case RSPAMD_MILTER_WANNA_DIE:
/* We are here after processing everything, so release session */
REF_RELEASE (session);
break;
}
return TRUE;
}
gboolean
rspamd_milter_handle_socket (gint fd, const struct timeval *tv,
struct event_base *ev_base, rspamd_milter_finish finish_cb,
rspamd_milter_error error_cb, void *ud)
{
struct rspamd_milter_session *session;
struct rspamd_milter_private *priv;
guchar uidbuf[7];
g_assert (finish_cb != NULL);
g_assert (error_cb != NULL);
session = g_malloc0 (sizeof (*session));
priv = g_malloc0 (sizeof (*priv));
priv->fd = fd;
priv->ud = ud;
priv->fin_cb = finish_cb;
priv->err_cb = error_cb;
priv->parser.state = st_len_1;
priv->parser.buf = rspamd_fstring_sized_new (100);
priv->ev_base = ev_base;
priv->state = RSPAMD_MILTER_READ_MORE;
ottery_rand_bytes (uidbuf, sizeof (uidbuf));
rspamd_encode_hex_buf (uidbuf, sizeof (uidbuf), priv->uid,
sizeof (priv->uid) - 1);
priv->uid[sizeof (priv->uid) - 1] = '\0';
if (tv) {
memcpy (&priv->tv, tv, sizeof (*tv));
priv->ptv = &priv->tv;
}
else {
priv->ptv = NULL;
}
session->priv = priv;
REF_INIT_RETAIN (session, rspamd_milter_session_dtor);
return rspamd_milter_handle_session (session, priv);
}
gboolean
rspamd_milter_set_reply (struct rspamd_milter_session *session,
rspamd_fstring_t *xcode,
rspamd_fstring_t *rcode,
rspamd_fstring_t *reply)
{
GString *buf;
gboolean ret;
buf = g_string_sized_new (xcode->len + rcode->len + reply->len + 2);
rspamd_printf_gstring (buf, "%v %v %v", xcode, rcode, reply);
ret = rspamd_milter_send_action (session, RSPAMD_MILTER_REPLYCODE,
buf);
return ret;
}
#define SET_COMMAND(cmd, sz, reply, pos) do { \
guint32 _len; \
_len = (sz) + 1; \
(reply) = rspamd_fstring_sized_new (sizeof (_len) + (sz)); \
(reply)->len = sizeof (_len) + (sz) + 1; \
_len = htonl (_len); \
memcpy ((reply)->str, &_len, sizeof (_len)); \
(reply)->str[sizeof(_len)] = (cmd); \
(pos) = (guchar *)(reply)->str + sizeof (_len) + 1; \
} while (0)
gboolean
rspamd_milter_send_action (struct rspamd_milter_session *session,
enum rspamd_milter_reply act, ...)
{
guint32 ver, actions, protocol, idx;
va_list ap;
guchar cmd, *pos;
rspamd_fstring_t *reply = NULL;
GString *name, *value;
struct rspamd_milter_outbuf *obuf;
struct rspamd_milter_private *priv = session->priv;
va_start (ap, act);
cmd = act;
switch (act) {
case RSPAMD_MILTER_ACCEPT:
case RSPAMD_MILTER_CONTINUE:
case RSPAMD_MILTER_DISCARD:
case RSPAMD_MILTER_PROGRESS:
case RSPAMD_MILTER_REJECT:
case RSPAMD_MILTER_TEMPFAIL:
/* No additional arguments */
SET_COMMAND (cmd, 0, reply, pos);
break;
case RSPAMD_MILTER_ADDHEADER:
name = va_arg (ap, GString *);
value = va_arg (ap, GString *);
/* Name and value must be zero terminated */
SET_COMMAND (cmd, name->len + value->len + 2, reply, pos);
memcpy (pos, name->str, name->len + 1);
pos += name->len + 1;
memcpy (pos, value->str, value->len + 1);
break;
case RSPAMD_MILTER_CHGHEADER:
idx = htonl (va_arg (ap, guint32));
name = va_arg (ap, GString *);
value = va_arg (ap, GString *);
/* Name and value must be zero terminated */
SET_COMMAND (cmd, name->len + value->len + 2 + sizeof (guint32),
reply, pos);
memcpy (pos, &idx, sizeof (idx));
pos += sizeof (idx);
memcpy (pos, name->str, name->len + 1);
pos += name->len + 1;
memcpy (pos, value->str, value->len + 1);
break;
case RSPAMD_MILTER_REPLYCODE:
case RSPAMD_MILTER_ADDRCPT:
case RSPAMD_MILTER_DELRCPT:
/* Single GString * argument */
value = va_arg (ap, GString *);
SET_COMMAND (cmd, value->len + 1, reply, pos);
memcpy (pos, value->str, value->len + 1);
break;
case RSPAMD_MILTER_OPTNEG:
ver = htonl (va_arg (ap, guint32));
actions = htonl (va_arg (ap, guint32));
protocol = htonl (va_arg (ap, guint32));
SET_COMMAND (cmd, sizeof (guint32) * 3, reply, pos);
memcpy (pos, &ver, sizeof (ver));
pos += sizeof (ver);
memcpy (pos, &actions, sizeof (actions));
pos += sizeof (actions);
memcpy (pos, &protocol, sizeof (protocol));
break;
default:
msg_err_milter ("invalid command: %c", cmd);
break;
}
va_end (ap);
if (reply) {
obuf = g_malloc (sizeof (*obuf));
obuf->buf = reply;
obuf->pos = 0;
DL_APPEND (priv->out_chain, obuf);
priv->state = RSPAMD_MILTER_WRITE_REPLY;
rspamd_milter_plan_io (session, priv, EV_WRITE);
return TRUE;
}
return FALSE;
}
gboolean
rspamd_milter_add_header (struct rspamd_milter_session *session,
GString *name, GString *value)
{
return rspamd_milter_send_action (session, RSPAMD_MILTER_ADDHEADER,
name, value);
}
gboolean
rspamd_milter_del_header (struct rspamd_milter_session *session,
GString *name)
{
GString value;
guint32 idx = 1;
value.str = (gchar *)"";
value.len = 0;
return rspamd_milter_send_action (session, RSPAMD_MILTER_CHGHEADER,
idx, name, value);
}
void
rspamd_milter_session_unref (struct rspamd_milter_session *session)
{
REF_RELEASE (session);
}
struct rspamd_milter_session *
rspamd_milter_session_ref (struct rspamd_milter_session *session)
{
REF_RETAIN (session);
return session;
}
#define IF_MACRO(lit) RSPAMD_FTOK_ASSIGN (&srch, (lit)); \
found = g_hash_table_lookup (session->macros, &srch); \
if (found)
static void
rspamd_milter_macro_http (struct rspamd_milter_session *session,
struct rspamd_http_message *msg)
{
rspamd_ftok_t *found, srch;
/*
* We assume postfix macros here, sendmail ones might be slightly
* different
*/
if (!session->macros) {
return;
}
IF_MACRO("i") {
rspamd_http_message_add_header_len (msg, QUEUE_ID_HEADER,
found->begin, found->len);
}
IF_MACRO("{daemon_name}") {
rspamd_http_message_add_header_len (msg, MTA_TAG_HEADER,
found->begin, found->len);
}
IF_MACRO("{v}") {
rspamd_http_message_add_header_len (msg, USER_AGENT_HEADER,
found->begin, found->len);
}
IF_MACRO("{cipher}") {
rspamd_http_message_add_header_len (msg, TLS_CIPHER_HEADER,
found->begin, found->len);
}
IF_MACRO("{tls_version}") {
rspamd_http_message_add_header_len (msg, TLS_VERSION_HEADER,
found->begin, found->len);
}
}
struct rspamd_http_message *
rspamd_milter_to_http (struct rspamd_milter_session *session)
{
struct rspamd_http_message *msg;
guint i;
struct rspamd_email_address *rcpt;
g_assert (session != NULL);
msg = rspamd_http_new_message (HTTP_REQUEST);
msg->url = rspamd_fstring_assign (msg->url, "/" MSG_CMD_CHECK_V2,
sizeof ("/" MSG_CMD_CHECK_V2) - 1);
if (session->message) {
rspamd_http_message_set_body_from_fstring_steal (msg, session->message);
}
if (session->hostname && session->hostname->len > 0) {
rspamd_http_message_add_header_fstr (msg, HOSTNAME_HEADER,
session->hostname);
}
if (session->helo && session->helo->len > 0) {
rspamd_http_message_add_header_fstr (msg, HELO_HEADER,
session->helo);
}
if (session->from) {
rspamd_http_message_add_header_len (msg, FROM_HEADER,
session->from->raw, session->from->raw_len);
}
if (session->rcpts) {
PTR_ARRAY_FOREACH (session->rcpts, i, rcpt) {
rspamd_http_message_add_header_len (msg, RCPT_HEADER,
rcpt->raw, rcpt->raw_len);
}
}
rspamd_milter_macro_http (session, msg);
return msg;
}
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