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1 #ifndef HEADER_CURL_SMTP_H
2 #define HEADER_CURL_SMTP_H
3 /***************************************************************************
4  *                                  _   _ ____  _
5  *  Project                     ___| | | |  _ \| |
6  *                             / __| | | | |_) | |
7  *                            | (__| |_| |  _ <| |___
8  *                             \___|\___/|_| \_\_____|
9  *
10  * Copyright (C) 2009 - 2014, 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 https://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 #include "curl_sasl.h"
27 
28 /****************************************************************************
29  * SMTP unique setup
30  ***************************************************************************/
31 typedef enum {
32   SMTP_STOP,        /* do nothing state, stops the state machine */
33   SMTP_SERVERGREET, /* waiting for the initial greeting immediately after
34                        a connect */
35   SMTP_EHLO,
36   SMTP_HELO,
37   SMTP_STARTTLS,
38   SMTP_UPGRADETLS,  /* asynchronously upgrade the connection to SSL/TLS
39                        (multi mode only) */
40   SMTP_AUTH,
41   SMTP_COMMAND,     /* VRFY, EXPN, NOOP, RSET and HELP */
42   SMTP_MAIL,        /* MAIL FROM */
43   SMTP_RCPT,        /* RCPT TO */
44   SMTP_DATA,
45   SMTP_POSTDATA,
46   SMTP_QUIT,
47   SMTP_LAST         /* never used */
48 } smtpstate;
49 
50 /* This SMTP struct is used in the Curl_easy. All SMTP data that is
51    connection-oriented must be in smtp_conn to properly deal with the fact that
52    perhaps the Curl_easy is changed between the times the connection is
53    used. */
54 struct SMTP {
55   curl_pp_transfer transfer;
56   char *custom;            /* Custom Request */
57   struct curl_slist *rcpt; /* Recipient list */
58   size_t eob;              /* Number of bytes of the EOB (End Of Body) that
59                               have been received so far */
60   bool trailing_crlf;      /* Specifies if the tailing CRLF is present */
61 };
62 
63 /* smtp_conn is used for struct connection-oriented data in the connectdata
64    struct */
65 struct smtp_conn {
66   struct pingpong pp;
67   smtpstate state;         /* Always use smtp.c:state() to change state! */
68   bool ssldone;            /* Is connect() over SSL done? */
69   char *domain;            /* Client address/name to send in the EHLO */
70   struct SASL sasl;        /* SASL-related storage */
71   bool tls_supported;      /* StartTLS capability supported by server */
72   bool size_supported;     /* If server supports SIZE extension according to
73                               RFC 1870 */
74   bool auth_supported;     /* AUTH capability supported by server */
75 };
76 
77 extern const struct Curl_handler Curl_handler_smtp;
78 extern const struct Curl_handler Curl_handler_smtps;
79 
80 /* this is the 5-bytes End-Of-Body marker for SMTP */
81 #define SMTP_EOB "\x0d\x0a\x2e\x0d\x0a"
82 #define SMTP_EOB_LEN 5
83 #define SMTP_EOB_FIND_LEN 3
84 
85 /* if found in data, replace it with this string instead */
86 #define SMTP_EOB_REPL "\x0d\x0a\x2e\x2e"
87 #define SMTP_EOB_REPL_LEN 4
88 
89 CURLcode Curl_smtp_escape_eob(struct connectdata *conn, const ssize_t nread);
90 
91 #endif /* HEADER_CURL_SMTP_H */
92