1#ifndef HEADER_CURL_SMTP_H
2#define HEADER_CURL_SMTP_H
3/***************************************************************************
4 *                                  _   _ ____  _
5 *  Project                     ___| | | |  _ \| |
6 *                             / __| | | | |_) | |
7 *                            | (__| |_| |  _ <| |___
8 *                             \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 2009 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
11 *
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at http://curl.haxx.se/docs/copyright.html.
15 *
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ***************************************************************************/
24
25#include "pingpong.h"
26
27/****************************************************************************
28 * SMTP unique setup
29 ***************************************************************************/
30typedef enum {
31  SMTP_STOP,        /* do nothing state, stops the state machine */
32  SMTP_SERVERGREET, /* waiting for the initial greeting immediately after
33                       a connect */
34  SMTP_EHLO,
35  SMTP_HELO,
36  SMTP_STARTTLS,
37  SMTP_UPGRADETLS,  /* asynchronously upgrade the connection to SSL/TLS
38                       (multi mode only) */
39  SMTP_AUTH_PLAIN,
40  SMTP_AUTH_LOGIN,
41  SMTP_AUTH_LOGIN_PASSWD,
42  SMTP_AUTH_CRAMMD5,
43  SMTP_AUTH_DIGESTMD5,
44  SMTP_AUTH_DIGESTMD5_RESP,
45  SMTP_AUTH_NTLM,
46  SMTP_AUTH_NTLM_TYPE2MSG,
47  SMTP_AUTH_XOAUTH2,
48  SMTP_AUTH_CANCEL,
49  SMTP_AUTH_FINAL,
50  SMTP_COMMAND,     /* VRFY, EXPN, NOOP, RSET and HELP */
51  SMTP_MAIL,        /* MAIL FROM */
52  SMTP_RCPT,        /* RCPT TO */
53  SMTP_DATA,
54  SMTP_POSTDATA,
55  SMTP_QUIT,
56  SMTP_LAST         /* never used */
57} smtpstate;
58
59/* This SMTP struct is used in the SessionHandle. All SMTP data that is
60   connection-oriented must be in smtp_conn to properly deal with the fact that
61   perhaps the SessionHandle is changed between the times the connection is
62   used. */
63struct SMTP {
64  curl_pp_transfer transfer;
65  char *custom;            /* Custom Request */
66  struct curl_slist *rcpt; /* Recipient list */
67  size_t eob;              /* Number of bytes of the EOB (End Of Body) that
68                              have been received so far */
69  bool trailing_crlf;      /* Specifies if the tailing CRLF is present */
70};
71
72/* smtp_conn is used for struct connection-oriented data in the connectdata
73   struct */
74struct smtp_conn {
75  struct pingpong pp;
76  smtpstate state;         /* Always use smtp.c:state() to change state! */
77  bool ssldone;            /* Is connect() over SSL done? */
78  char *domain;            /* Client address/name to send in the EHLO */
79  unsigned int authmechs;  /* Accepted authentication mechanisms */
80  unsigned int prefmech;   /* Preferred authentication mechanism */
81  unsigned int authused;   /* Auth mechanism used for the connection */
82  bool tls_supported;      /* StartTLS capability supported by server */
83  bool size_supported;     /* If server supports SIZE extension according to
84                              RFC 1870 */
85};
86
87extern const struct Curl_handler Curl_handler_smtp;
88extern const struct Curl_handler Curl_handler_smtps;
89
90/* this is the 5-bytes End-Of-Body marker for SMTP */
91#define SMTP_EOB "\x0d\x0a\x2e\x0d\x0a"
92#define SMTP_EOB_LEN 5
93#define SMTP_EOB_FIND_LEN 3
94
95/* if found in data, replace it with this string instead */
96#define SMTP_EOB_REPL "\x0d\x0a\x2e\x2e"
97#define SMTP_EOB_REPL_LEN 4
98
99CURLcode Curl_smtp_escape_eob(struct connectdata *conn, ssize_t nread);
100
101#endif /* HEADER_CURL_SMTP_H */
102