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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/* Copyright 1993-95 by Carl Harris, Jr. Copyright 1996 by Eric S. Raymond
* All rights reserved.
* For license terms, see the file COPYING in this directory.
*/
/***********************************************************************
module: pop2.c
project: fetchmail
programmer: Carl Harris, ceharris@mal.com
Hacks and bug fixes by esr.
description: POP2 client code.
***********************************************************************/
#include <config.h>
#include <stdio.h>
#if defined(STDC_HEADERS)
#include <string.h>
#endif
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <sys/time.h>
#include <errno.h>
#include "socket.h"
#include "fetchmail.h"
#if HAVE_PROTOTYPES
#endif
/*********************************************************************
Method declarations for POP2
*********************************************************************/
static int pound_arg, equal_arg;
int pop2_ok (argbuf,socket)
/* parse POP2 command response */
char *argbuf;
int socket;
{
int ok;
char buf [POPBUFSIZE+1];
pound_arg = equal_arg = -1;
if (SockGets(socket, buf, sizeof(buf)) >= 0) {
if (outlevel == O_VERBOSE)
fprintf(stderr,"%s\n",buf);
if (buf[0] == '+')
ok = 0;
else if (buf[0] == '#')
{
pound_arg = atoi(buf+1);
ok = 0;
}
else if (buf[0] == '=')
{
equal_arg = atoi(buf+1);
ok = 0;
}
else if (buf[0] == '-')
ok = PS_ERROR;
else
ok = PS_PROTOCOL;
if (argbuf != NULL)
strcpy(argbuf,buf);
}
else
ok = PS_SOCKET;
return(ok);
}
int pop2_getauth(socket, queryctl, buf)
/* apply for connection authorization */
int socket;
struct hostrec *queryctl;
char *buf;
{
return(gen_transact(socket,
"HELO %s %s",
queryctl->remotename, queryctl->password));
}
static pop2_getrange(socket, queryctl, countp, firstp)
/* get range of messages to be fetched */
int socket;
struct hostrec *queryctl;
int *countp;
int *firstp;
{
/*
* We should have picked up a count of messages in the user's
* default inbox from the pop2_getauth() response.
*/
if (pound_arg == -1)
return(PS_ERROR);
/* maybe the user wanted a non-default folder */
if (queryctl->remotefolder[0])
{
int ok = gen_transact(socket, "FOLD %s", queryctl->remotefolder);
if (ok != 0)
return(ok);
if (pound_arg == -1)
return(PS_ERROR);
}
*firstp = 1;
*countp = pound_arg;
return(0);
}
static int pop2_fetch(socket, number, limit, lenp)
/* request nth message */
int socket;
int number;
int limit;
int *lenp;
{
int ok;
*lenp = 0;
ok = gen_transact(socket, "READ %d", number);
if (ok)
return(0);
*lenp = equal_arg;
gen_send(socket, "RETR");
return(ok);
}
static pop2_trail(socket, queryctl, number)
/* send acknowledgement for message data */
int socket;
struct hostrec *queryctl;
int number;
{
return(gen_transact(socket, queryctl->keep ? "ACKS" : "ACKD"));
}
static struct method pop2 =
{
"POP2", /* Post Office Protocol v2 */
109, /* standard POP2 port */
0, /* this is not a tagged protocol */
0, /* does not use message delimiter */
pop2_ok, /* parse command response */
pop2_getauth, /* get authorization */
pop2_getrange, /* query range of messages */
pop2_fetch, /* request given message */
pop2_trail, /* eat message trailer */
NULL, /* no POP2 delete command */
NULL, /* no POP2 expunge command */
"QUIT", /* the POP2 exit command */
};
int doPOP2 (queryctl)
struct hostrec *queryctl;
{
/* check for unsupported options */
if (linelimit) {
fprintf(stderr,"Option --limit is not supported with POP2\n");
return(PS_SYNTAX);
}
else if (queryctl->flush) {
fprintf(stderr,"Option --flush is not supported with POP2\n");
return(PS_SYNTAX);
}
else if (queryctl->fetchall) {
fprintf(stderr,"Option --all is not supported with POP2\n");
return(PS_SYNTAX);
}
return(do_protocol(queryctl, &pop2));
}
|
