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/* Copyright 1996 by Eric S. Raymond
* All rights reserved.
* For license terms, see the file COPYING in this directory.
*/
/***********************************************************************
module: imap.c
project: popclient
programmer: Eric S. Raymond
description: IMAP client code
***********************************************************************/
#include <config.h>
#include <varargs.h>
#include <stdio.h>
#if defined(STDC_HEADERS)
#include <string.h>
#endif
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <errno.h>
#include "socket.h"
#include "popclient.h"
static int count, first;
/*********************************************************************
Method declarations for IMAP
*********************************************************************/
static int exists, unseen, recent;
int imap_ok (argbuf,socket)
/* parse command response */
char *argbuf;
int socket;
{
int ok;
char buf [POPBUFSIZE];
char *bufp;
int n;
do {
if (SockGets(socket, buf, sizeof(buf)) < 0)
return(PS_SOCKET);
if (outlevel == O_VERBOSE)
fprintf(stderr,"%s\n",buf);
/* interpret untagged status responses */
if (strstr(buf, "EXISTS"))
exists = atoi(buf+2);
if (strstr(buf, "RECENT"))
recent = atoi(buf+2);
if (sscanf(buf + 2, "OK [UNSEEN %d]", &n) == 1)
unseen = n;
} while
(tag[0] != '\0' && strncmp(buf, tag, strlen(tag)));
if (tag[0] == '\0') {
strcpy(argbuf, buf);
return(0);
}
else {
if (strncmp(buf + TAGLEN + 1, "OK", 2) == 0) {
strcpy(argbuf, buf + TAGLEN);
return(0);
}
else if (strncmp(buf + TAGLEN + 1, "BAD", 2) == 0)
return(PS_ERROR);
else
return(PS_PROTOCOL);
}
}
int imap_getauth(socket, queryctl, buf)
/* apply for connection authorization */
int socket;
struct hostrec *queryctl;
char *buf;
{
/* try to get authorized */
return(gen_transact(socket,
"LOGIN %s %s",
queryctl->remotename, queryctl->password));
}
static imap_getrange(socket, queryctl, countp, firstp)
/* get range of messages to be fetched */
int socket;
struct hostrec *queryctl;
int *countp;
int *firstp;
{
int ok;
/* find out how many messages are waiting */
exists = unseen = recent = -1;
ok = gen_transact(socket,
"SELECT %s",
queryctl->remotefolder[0] ? queryctl->remotefolder : "INBOX");
if (ok != 0)
return(ok);
/* compute size of message run */
*countp = exists;
if (queryctl->fetchall)
*firstp = 1;
else {
if (exists > 0 && unseen == -1) {
fprintf(stderr,
"no UNSEEN response; assuming all %d RECENT messages are unseen\n",
recent);
*firstp = exists - recent + 1;
} else {
*firstp = unseen;
}
}
return(0);
}
static int imap_fetch(socket, number, limit, lenp)
/* request nth message */
int socket;
int number;
int limit;
int *lenp;
{
char buf [POPBUFSIZE];
int num;
if (limit)
gen_send(socket,
"PARTIAL %d RFC822 0 %d",
number, limit);
else
gen_send(socket,
"FETCH %d RFC822",
number);
/* looking for FETCH response */
do {
if (SockGets(socket, buf,sizeof(buf)) < 0)
return(PS_SOCKET);
} while
(sscanf(buf+2, "%d FETCH (RFC822 {%d}", &num, lenp) != 2);
if (num != number)
return(PS_ERROR);
else
return(0);
}
static imap_trail(socket, queryctl, number)
/* discard tail of FETCH response */
int socket;
struct hostrec *queryctl;
int number;
{
char buf [POPBUFSIZE];
if (SockGets(socket, buf,sizeof(buf)) < 0)
return(PS_SOCKET);
else
return(0);
}
static struct method imap =
{
"IMAP", /* Internet Message Access Protocol */
143, /* standard IMAP3bis/IMAP4 port */
1, /* this is a tagged protocol */
0, /* no message delimiter */
imap_ok, /* parse command response */
imap_getauth, /* get authorization */
imap_getrange, /* query range of messages */
imap_fetch, /* request given message */
imap_trail, /* eat message trailer */
"STORE %d +FLAGS (\\Deleted)", /* set IMAP delete flag */
"EXPUNGE", /* the IMAP expunge command */
"LOGOUT", /* the IMAP exit command */
};
int doIMAP (queryctl)
/* retrieve messages using IMAP Version 2bis or Version 4 */
struct hostrec *queryctl;
{
return(do_protocol(queryctl, &imap));
}
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