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/*-
* Copyright 2016 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 SRC_LIBMIME_MIME_HEADERS_H_
#define SRC_LIBMIME_MIME_HEADERS_H_
#include "config.h"
#include "libutil/mem_pool.h"
#include "libutil/addr.h"
#include "khash.h"
#include "contrib/libucl/ucl.h"
#ifdef __cplusplus
extern "C" {
#endif
struct rspamd_task;
enum rspamd_rfc2047_encoding {
RSPAMD_RFC2047_QP = 0,
RSPAMD_RFC2047_BASE64,
};
enum rspamd_mime_header_flags {
RSPAMD_HEADER_GENERIC = 0u,
RSPAMD_HEADER_RECEIVED = 1u << 0u,
RSPAMD_HEADER_TO = 1u << 2u,
RSPAMD_HEADER_CC = 1u << 3u,
RSPAMD_HEADER_BCC = 1u << 4u,
RSPAMD_HEADER_FROM = 1u << 5u,
RSPAMD_HEADER_MESSAGE_ID = 1u << 6u,
RSPAMD_HEADER_SUBJECT = 1u << 7u,
RSPAMD_HEADER_RETURN_PATH = 1u << 8u,
RSPAMD_HEADER_DELIVERED_TO = 1u << 9u,
RSPAMD_HEADER_SENDER = 1u << 10u,
RSPAMD_HEADER_RCPT = 1u << 11u,
RSPAMD_HEADER_UNIQUE = 1u << 12u,
RSPAMD_HEADER_EMPTY_SEPARATOR = 1u << 13u,
RSPAMD_HEADER_TAB_SEPARATED = 1u << 14u,
RSPAMD_HEADER_MODIFIED = 1u << 15u, /* Means we need to check modified chain */
RSPAMD_HEADER_ADDED = 1u << 16u, /* A header has been artificially added */
RSPAMD_HEADER_REMOVED = 1u << 17u, /* A header has been artificially removed */
RSPAMD_HEADER_NON_EXISTING = 1u << 18u, /* Header was not in the original message */
};
struct rspamd_mime_header {
const gchar *raw_value; /* As it is in the message (unfolded and unparsed) */
gsize raw_len;
guint order;
int flags; /* see enum rspamd_mime_header_flags */
/* These are zero terminated (historically) */
gchar *name; /* Also used for key */
gchar *value;
gchar *separator;
gchar *decoded;
struct rspamd_mime_header *modified_chain; /* Headers modified during transform */
struct rspamd_mime_header *prev, *next; /* Headers with the same name */
struct rspamd_mime_header *ord_next; /* Overall order of headers, slist */
};
struct rspamd_mime_headers_table;
enum rspamd_received_type {
RSPAMD_RECEIVED_SMTP = 1u << 0u,
RSPAMD_RECEIVED_ESMTP = 1u << 1u,
RSPAMD_RECEIVED_ESMTPA = 1u << 2u,
RSPAMD_RECEIVED_ESMTPS = 1u << 3u,
RSPAMD_RECEIVED_ESMTPSA = 1u << 4u,
RSPAMD_RECEIVED_LMTP = 1u << 5u,
RSPAMD_RECEIVED_IMAP = 1u << 6u,
RSPAMD_RECEIVED_LOCAL = 1u << 7u,
RSPAMD_RECEIVED_HTTP = 1u << 8u,
RSPAMD_RECEIVED_MAPI = 1u << 9u,
RSPAMD_RECEIVED_UNKNOWN = 1u << 10u,
RSPAMD_RECEIVED_FLAG_ARTIFICIAL = (1u << 11u),
RSPAMD_RECEIVED_FLAG_SSL = (1u << 12u),
RSPAMD_RECEIVED_FLAG_AUTHENTICATED = (1u << 13u),
};
#define RSPAMD_RECEIVED_FLAG_TYPE_MASK (RSPAMD_RECEIVED_SMTP| \
RSPAMD_RECEIVED_ESMTP| \
RSPAMD_RECEIVED_ESMTPA| \
RSPAMD_RECEIVED_ESMTPS| \
RSPAMD_RECEIVED_ESMTPSA| \
RSPAMD_RECEIVED_LMTP| \
RSPAMD_RECEIVED_IMAP| \
RSPAMD_RECEIVED_LOCAL| \
RSPAMD_RECEIVED_HTTP| \
RSPAMD_RECEIVED_MAPI| \
RSPAMD_RECEIVED_UNKNOWN)
struct rspamd_email_address;
struct rspamd_received_header {
const gchar *from_hostname;
const gchar *from_ip;
const gchar *real_hostname;
const gchar *real_ip;
const gchar *by_hostname;
const gchar *for_mbox;
struct rspamd_email_address *for_addr;
rspamd_inet_addr_t *addr;
struct rspamd_mime_header *hdr;
time_t timestamp;
gint flags; /* See enum rspamd_received_type */
struct rspamd_received_header *prev, *next;
};
/**
* Process headers and store them in `target`
* @param task
* @param target
* @param in
* @param len
* @param check_newlines
*/
void rspamd_mime_headers_process (struct rspamd_task *task,
struct rspamd_mime_headers_table *target,
struct rspamd_mime_header **order_ptr,
const gchar *in, gsize len,
gboolean check_newlines);
/**
* Perform rfc2047 decoding of a header
* @param pool
* @param in
* @param inlen
* @return
*/
gchar *rspamd_mime_header_decode (rspamd_mempool_t *pool, const gchar *in,
gsize inlen, gboolean *invalid_utf);
/**
* Encode mime header if needed
* @param in
* @param len
* @return newly allocated encoded header
*/
gchar *rspamd_mime_header_encode (const gchar *in, gsize len);
/**
* Generate new unique message id
* @param fqdn
* @return
*/
gchar *rspamd_mime_message_id_generate (const gchar *fqdn);
/**
* Get an array of header's values with specified header's name using raw headers
* @param task worker task structure
* @param field header's name
* @return An array of header's values or NULL. It is NOT permitted to free array or values.
*/
struct rspamd_mime_header *
rspamd_message_get_header_array (struct rspamd_task *task,
const gchar *field,
gboolean need_modified);
/**
* Get an array of header's values with specified header's name using raw headers
* @param htb hash table indexed by header name (caseless) with ptr arrays as elements
* @param field header's name
* @return An array of header's values or NULL. It is NOT permitted to free array or values.
*/
struct rspamd_mime_header *
rspamd_message_get_header_from_hash (struct rspamd_mime_headers_table *hdrs,
const gchar *field,
gboolean need_modified);
/**
* Modifies a header (or insert one if not found)
* @param hdrs
* @param hdr_name
* @param obj an array of modified values
*
*/
void
rspamd_message_set_modified_header (struct rspamd_task *task,
struct rspamd_mime_headers_table *hdrs,
const gchar *hdr_name,
const ucl_object_t *obj);
/**
* Cleans up hash table of the headers
* @param htb
*/
void rspamd_message_headers_unref (struct rspamd_mime_headers_table *hdrs);
struct rspamd_mime_headers_table * rspamd_message_headers_ref (struct rspamd_mime_headers_table *hdrs);
/**
* Init headers hash
* @return
*/
struct rspamd_mime_headers_table* rspamd_message_headers_new (void);
#ifdef __cplusplus
}
#endif
#endif /* SRC_LIBMIME_MIME_HEADERS_H_ */
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