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/* 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: Eric S. Raymond
description: POP2 method code.
***********************************************************************/
#include <config.h>
#include <stdio.h>
#include "socket.h"
#include "fetchmail.h"
/*********************************************************************
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));
}
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