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/*
* pop2.c -- POP2 protocol methods
*
* Copyright 1997 by Eric S. Raymond
* For license terms, see the file COPYING in this directory.
*/
#include "config.h"
#ifdef POP2_ENABLE
#include <stdio.h>
#if defined(STDC_HEADERS)
#include <stdlib.h>
#endif
#include "fetchmail.h"
#include "socket.h"
static int pound_arg, equal_arg;
int pop2_ok (int sock, char *argbuf)
/* parse POP2 command response */
{
int ok;
char buf [POPBUFSIZE+1];
pound_arg = equal_arg = -1;
if ((ok = gen_recv(sock, buf, sizeof(buf))) == 0)
{
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);
}
return(ok);
}
int pop2_getauth(int sock, struct query *ctl, char *buf)
/* apply for connection authorization */
{
return(gen_transact(sock,
"HELO %s %s",
ctl->remotename, ctl->password));
}
static int pop2_getrange(int sock, struct query *ctl, const char *folder, int*countp, int*newp)
/* get range of messages to be fetched */
{
/* maybe the user wanted a non-default folder */
if (folder)
{
int ok = gen_transact(sock, "FOLD %s", folder);
if (ok != 0)
return(ok);
if (pound_arg == -1)
return(PS_ERROR);
}
else
/*
* We should have picked up a count of messages in the user's
* default inbox from the pop2_getauth() response.
*
* Note: this logic only works because there is no way to select
* both the unnamed folder and named folders within a single
* fetchmail run. If that assumption ever becomes invalid, the
* pop2_getauth code will have to stash the pound response away
* explicitly in case it gets stepped on.
*/
if (pound_arg == -1)
return(PS_ERROR);
*countp = pound_arg;
*newp = -1;
return(0);
}
static int pop2_fetch(int sock, struct query *ctl, int number, int *lenp)
/* request nth message */
{
int ok;
*lenp = 0;
ok = gen_transact(sock, "READ %d", number);
if (ok)
return(0);
*lenp = equal_arg;
gen_send(sock, "RETR");
return(ok);
}
static int pop2_trail(int sock, struct query *ctl, int number)
/* send acknowledgement for message data */
{
return(gen_transact(sock, ctl->keep ? "ACKS" : "ACKD"));
}
static int pop2_logout(int sock, struct query *ctl)
/* send logout command */
{
return(gen_transact(sock, "QUIT"));
}
const static struct method pop2 =
{
"POP2", /* Post Office Protocol v2 */
109, /* standard POP2 port */
FALSE, /* this is not a tagged protocol */
FALSE, /* does not use message delimiter */
pop2_ok, /* parse command response */
pop2_getauth, /* get authorization */
pop2_getrange, /* query range of messages */
NULL, /* no way to get sizes */
NULL, /* messages are always new */
pop2_fetch, /* request given message */
NULL, /* no way to fetch body alone */
pop2_trail, /* eat message trailer */
NULL, /* no POP2 delete method */
pop2_logout, /* log out, we're done */
};
int doPOP2 (struct query *ctl)
/* retrieve messages using POP2 */
{
peek_capable = FALSE;
return(do_protocol(ctl, &pop2));
}
#endif /* POP2_ENABLE */
/* pop2.c ends here */
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