pop3_stls.c
3.62 KB
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
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2003, 2007, 2010 Free Software
Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <mailutils/pop3.h>
#include <mailutils/sys/pop3.h>
#include <mailutils/tls.h>
#include <mailutils/list.h>
static int
pop3_get_streams (mu_pop3_t pop3, mu_stream_t *streams)
{
int rc;
if (MU_POP3_FISSET (pop3, MU_POP3_TRACE))
rc = mu_stream_ioctl (pop3->carrier, MU_IOCTL_SUBSTREAM,
MU_IOCTL_OP_GET, streams);
else
{
streams[0] = pop3->carrier;
mu_stream_ref (streams[0]);
streams[1] = pop3->carrier;
mu_stream_ref (streams[1]);
rc = 0;
}
return rc;
}
static int
pop3_set_streams (mu_pop3_t pop3, mu_stream_t *streams)
{
int rc;
if (MU_POP3_FISSET (pop3, MU_POP3_TRACE))
rc = mu_stream_ioctl (pop3->carrier, MU_IOCTL_SUBSTREAM,
MU_IOCTL_OP_SET, streams);
else
{
mu_stream_t tmp;
if (streams[0] == streams[1])
{
tmp = streams[0];
mu_stream_ref (tmp);
mu_stream_ref (tmp);
rc = 0;
}
else
rc = mu_iostream_create (&tmp, streams[0], streams[1]);
if (rc == 0)
{
mu_stream_unref (pop3->carrier);
pop3->carrier = tmp;
}
}
return rc;
}
/*
* STLS
* We have to assume that the caller check the CAPA and TLS was supported.
*/
int
mu_pop3_stls (mu_pop3_t pop3)
{
#ifdef WITH_TLS
int status;
mu_stream_t tlsstream, streams[2];
/* Sanity checks. */
if (pop3 == NULL)
return EINVAL;
switch (pop3->state)
{
case MU_POP3_NO_STATE:
status = mu_pop3_writeline (pop3, "STLS\r\n");
MU_POP3_CHECK_ERROR (pop3, status);
MU_POP3_FCLR (pop3, MU_POP3_ACK);
pop3->state = MU_POP3_STLS;
case MU_POP3_STLS:
status = mu_pop3_response (pop3, NULL);
MU_POP3_CHECK_EAGAIN (pop3, status);
MU_POP3_CHECK_OK (pop3);
pop3->state = MU_POP3_STLS_CONNECT;
case MU_POP3_STLS_CONNECT:
status = pop3_get_streams (pop3, streams);
MU_POP3_CHECK_EAGAIN (pop3, status);
status = mu_tls_client_stream_create (&tlsstream,
streams[0], streams[1], 0);
mu_stream_unref (streams[0]);
mu_stream_unref (streams[1]);
MU_POP3_CHECK_EAGAIN (pop3, status);
streams[0] = streams[1] = tlsstream;
status = pop3_set_streams (pop3, streams);
mu_stream_unref (streams[0]);
mu_stream_unref (streams[1]);
MU_POP3_CHECK_EAGAIN (pop3, status);
/* Invalidate the capability list */
mu_list_destroy (&pop3->capa);
pop3->state = MU_POP3_NO_STATE;
return 0;
/* They must deal with the error first by reopening. */
case MU_POP3_ERROR:
status = ECANCELED;
break;
/* No case in the switch another operation was in progress. */
default:
status = EINPROGRESS;
}
return status;
#else
return ENOTSUP;
#endif
}