msgheader.c
3.46 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
143
144
145
146
147
148
149
150
151
152
153
154
155
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2002, 2004-2007, 2009-2012 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/>. */
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <mailutils/types.h>
#include <mailutils/message.h>
#include <mailutils/errno.h>
#include <mailutils/header.h>
#include <mailutils/stream.h>
#include <mailutils/sys/message.h>
enum eoh_state
{
eoh_no,
eoh_maybe,
eoh_yes
};
/* Message header stuff */
static enum eoh_state
string_find_eoh (enum eoh_state eoh, const char *str, size_t len,
size_t *ppos)
{
size_t pos;
if (eoh == eoh_maybe && *str == '\n')
{
*ppos = 0;
return eoh_yes;
}
for (pos = 0; pos < len - 1; pos++)
if (str[pos] == '\n' && str[pos + 1] == '\n')
{
*ppos = pos + 1;
return eoh_yes;
}
*ppos = pos + 1;
return str[pos] == '\n' ? eoh_maybe : eoh_no;
}
#define MIN_HEADER_BUF_SIZE 2048
static int
_header_fill (mu_stream_t stream, char **pbuf, size_t *plen)
{
int status = 0;
char *buffer = NULL;
size_t bufsize = 0;
char inbuf[MIN_HEADER_BUF_SIZE];
size_t nread;
enum eoh_state eoh = eoh_no;
status = mu_stream_seek (stream, 0, MU_SEEK_SET, NULL);
if (status)
return status;
while (eoh != eoh_yes
&& (status = mu_stream_read (stream, inbuf, sizeof (inbuf), &nread))
== 0
&& nread)
{
char *nbuf;
size_t len;
eoh = string_find_eoh (eoh, inbuf, nread, &len);
nbuf = realloc (buffer, bufsize + len);
if (!nbuf)
{
status = ENOMEM;
break;
}
memcpy (nbuf + bufsize, inbuf, len);
buffer = nbuf;
bufsize += len;
}
if (status)
free (buffer);
else
{
*pbuf = buffer;
*plen = bufsize;
}
return status;
}
static int
message_header_fill (void *data, char **pbuf, size_t *plen)
{
mu_message_t msg = data;
return _header_fill (msg->rawstream, pbuf, plen);
}
int
mu_message_get_header (mu_message_t msg, mu_header_t *phdr)
{
if (msg == NULL)
return EINVAL;
if (phdr == NULL)
return MU_ERR_OUT_PTR_NULL;
if (msg->header == NULL)
{
mu_header_t header;
int status = mu_header_create (&header, NULL, 0);
if (status != 0)
return status;
if (msg->rawstream)
mu_header_set_fill (header, message_header_fill, msg);
status = mu_header_size (header, &msg->orig_header_size);
if (status)
return status;
msg->header = header;
}
*phdr = msg->header;
return 0;
}
/* Note: mu_message_set_header steals the reference to hdr */
int
mu_message_set_header (mu_message_t msg, mu_header_t hdr, void *owner)
{
if (msg == NULL )
return EINVAL;
if (msg->owner != owner)
return EACCES;
if (msg->header)
mu_header_destroy (&msg->header);
msg->header = hdr;
msg->flags |= MESSAGE_MODIFIED;
return 0;
}