1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*-
* 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.
*/
#ifndef RSPAMD_MILTER_INTERNAL_H
#define RSPAMD_MILTER_INTERNAL_H
#include "config.h"
#include "libutil/mem_pool.h"
#include <event.h>
enum rspamd_milter_state {
st_len_1 = 0,
st_len_2,
st_len_3,
st_len_4,
st_read_cmd,
st_read_data
};
struct rspamd_milter_parser {
rspamd_fstring_t *buf;
goffset pos;
goffset cmd_start;
gsize datalen;
enum rspamd_milter_state state;
gchar cur_cmd;
};
struct rspamd_milter_outbuf {
rspamd_fstring_t *buf;
goffset pos;
struct rspamd_milter_outbuf *next, *prev;
};
enum rspamd_milter_io_state {
RSPAMD_MILTER_READ_MORE,
RSPAMD_MILTER_WRITE_REPLY,
RSPAMD_MILTER_WANNA_DIE
};
struct rspamd_milter_private {
struct rspamd_milter_parser parser;
struct event ev;
struct timeval tv;
struct rspamd_milter_outbuf *out_chain;
struct timeval *ptv;
struct event_base *ev_base;
rspamd_mempool_t *pool;
GHashTable *headers;
rspamd_milter_finish fin_cb;
rspamd_milter_error err_cb;
void *ud;
enum rspamd_milter_io_state state;
int fd;
};
enum rspamd_milter_io_cmd {
RSPAMD_MILTER_CMD_ABORT = 'A', /* Abort */
RSPAMD_MILTER_CMD_BODY = 'B', /* Body chunk */
RSPAMD_MILTER_CMD_CONNECT = 'C', /* Connection information */
RSPAMD_MILTER_CMD_MACRO = 'D', /* Define macro */
RSPAMD_MILTER_CMD_BODYEOB = 'E', /* final body chunk (end of message) */
RSPAMD_MILTER_CMD_HELO = 'H', /* HELO/EHLO */
RSPAMD_MILTER_CMD_QUIT_NC = 'K', /* QUIT but new connection follows */
RSPAMD_MILTER_CMD_HEADER = 'L', /* Header */
RSPAMD_MILTER_CMD_MAIL = 'M', /* MAIL from */
RSPAMD_MILTER_CMD_EOH = 'N', /* EOH */
RSPAMD_MILTER_CMD_OPTNEG = 'O', /* Option negotiation */
RSPAMD_MILTER_CMD_QUIT = 'Q', /* QUIT */
RSPAMD_MILTER_CMD_RCPT = 'R', /* RCPT to */
RSPAMD_MILTER_CMD_DATA = 'T', /* DATA */
RSPAMD_MILTER_CMD_UNKNOWN = 'U' /* Any unknown command */
};
/*
* Protocol flags
*/
#define RSPAMD_MILTER_FLAG_NOUNKNOWN (1L<<8) /* filter does not want unknown cmd */
#define RSPAMD_MILTER_FLAG_NODATA (1L<<9) /* filter does not want DATA */
#define RSPAMD_MILTER_FLAG_NR_HDR (1L<<7) /* filter won't reply for header */
#define RSPAMD_MILTER_FLAG_SKIP (1L<<10)/* MTA supports SMFIR_SKIP */
#define RSPAMD_MILTER_FLAG_RCPT_REJ (1L<<11)/* filter wants rejected RCPTs */
#define RSPAMD_MILTER_FLAG_NR_CONN (1L<<12)/* filter won't reply for connect */
#define RSPAMD_MILTER_FLAG_NR_HELO (1L<<13)/* filter won't reply for HELO */
#define RSPAMD_MILTER_FLAG_NR_MAIL (1L<<14)/* filter won't reply for MAIL */
#define RSPAMD_MILTER_FLAG_NR_RCPT (1L<<15)/* filter won't reply for RCPT */
#define RSPAMD_MILTER_FLAG_NR_DATA (1L<<16)/* filter won't reply for DATA */
#define RSPAMD_MILTER_FLAG_NR_UNKN (1L<<17)/* filter won't reply for UNKNOWN */
#define RSPAMD_MILTER_FLAG_NR_EOH (1L<<18)/* filter won't reply for eoh */
#define RSPAMD_MILTER_FLAG_NR_BODY (1L<<19)/* filter won't reply for body chunk */
/*
* For now, we specify that we want to reply just after EOM
*/
#define RSPAMD_MILTER_FLAG_NOREPLY_MASK \
(RSPAMD_MILTER_FLAG_NR_CONN | RSPAMD_MILTER_FLAG_NR_HELO | \
RSPAMD_MILTER_FLAG_NR_MAIL | RSPAMD_MILTER_FLAG_NR_RCPT | \
RSPAMD_MILTER_FLAG_NR_DATA | RSPAMD_MILTER_FLAG_NR_UNKN | \
RSPAMD_MILTER_FLAG_NR_HDR | RSPAMD_MILTER_FLAG_NR_EOH | \
RSPAMD_MILTER_FLAG_NR_BODY)
/*
* Options that the filter may send at initial handshake time, and message
* modifications that the filter may request at the end of the message body.
*/
#define RSPAMD_MILTER_FLAG_ADDHDRS (1L<<0) /* filter may add headers */
#define RSPAMD_MILTER_FLAG_CHGBODY (1L<<1) /* filter may replace body */
#define RSPAMD_MILTER_FLAG_ADDRCPT (1L<<2) /* filter may add recipients */
#define RSPAMD_MILTER_FLAG_DELRCPT (1L<<3) /* filter may delete recipients */
#define RSPAMD_MILTER_FLAG_CHGHDRS (1L<<4) /* filter may change/delete headers */
#define RSPAMD_MILTER_ACTIONS_MASK \
(RSPAMD_MILTER_FLAG_ADDHDRS | RSPAMD_MILTER_FLAG_ADDRCPT | \
RSPAMD_MILTER_FLAG_DELRCPT | RSPAMD_MILTER_FLAG_CHGHDRS)
enum rspamd_milter_connect_proto {
RSPAMD_MILTER_CONN_UNKNOWN = 'U',
RSPAMD_MILTER_CONN_UNIX = 'L',
RSPAMD_MILTER_CONN_INET = '4',
RSPAMD_MILTER_CONN_INET6 = '6',
};
/*
* Rspamd supports just version 6 of the protocol, failing all versions below
* this one
*/
#define RSPAMD_MILTER_PROTO_VER 6
#define RSPAMD_MILTER_MESSAGE_CHUNK 65536
#define RSPAMD_MILTER_RCODE_REJECT "554"
#define RSPAMD_MILTER_RCODE_TEMPFAIL "451"
#define RSPAMD_MILTER_RCODE_LATER "452"
#define RSPAMD_MILTER_XCODE_REJECT "5.7.1"
#define RSPAMD_MILTER_XCODE_TEMPFAIL "4.7.1"
#define RSPAMD_MILTER_REJECT_MESSAGE "Spam message rejected"
#define RSPAMD_MILTER_TEMPFAIL_MESSAGE "Try again later"
#define RSPAMD_MILTER_SPAM_HEADER "X-Spam"
#define RSPAMD_MILTER_DKIM_HEADER "DKIM-Signature"
#endif
|
