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/*
* imap.c -- IMAP2bis protocol methods
*
* Copyright 1996 by Eric S. Raymond
* All rights reserved.
* For license terms, see the file COPYING in this directory.
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include "socket.h"
#include "fetchmail.h"
static int count, seen, recent, unseen;
int imap_ok (socket, argbuf)
/* parse command response */
char *argbuf;
int socket;
{
int ok;
char buf [POPBUFSIZE+1];
char *bufp;
int n;
seen = 0;
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"))
count = atoi(buf+2);
if (strstr(buf, "RECENT"))
recent = atoi(buf+2);
if (strstr(buf, "UNSEEN"))
unseen = atoi(buf+2);
if (strstr(buf, "FLAGS"))
seen = (strstr(buf, "Seen") != (char *)NULL);
} while
(tag[0] != '\0' && strncmp(buf, tag, strlen(tag)));
if (tag[0] == '\0')
{
strcpy(argbuf, buf);
return(0);
}
else
{
char *cp;
/* skip the tag */
for (cp = buf; !isspace(*cp); cp++)
continue;
while (isspace(*cp))
cp++;
if (strncmp(cp, "OK", 2) == 0)
{
strcpy(argbuf, cp);
return(0);
}
else if (strncmp(cp, "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, newp)
/* get range of messages to be fetched */
int socket;
struct hostrec *queryctl;
int *countp, *newp;
{
int ok;
/* find out how many messages are waiting */
recent = unseen = 0;
ok = gen_transact(socket,
"SELECT %s",
queryctl->mailbox[0] ? queryctl->mailbox : "INBOX");
if (ok != 0)
return(ok);
*countp = count;
if (unseen) /* optional response, but better if we see it */
*newp = unseen;
else if (recent) /* mandatory */
*newp = recent;
else
*newp = -1; /* should never happen, RECENT is mandatory */
return(0);
}
static int *imap_getsizes(socket, count)
/* capture the sizes of all messages */
int socket;
int count;
{
int ok, *sizes;
if ((sizes = (int *)malloc(sizeof(int) * count)) == (int *)NULL)
return((int *)NULL);
else
{
char buf [POPBUFSIZE+1];
gen_send(socket, "FETCH 1:%d RFC822.SIZE", count);
while (SockGets(socket, buf, sizeof(buf)) >= 0)
{
int num, size;
if (outlevel == O_VERBOSE)
fprintf(stderr,"%s\n",buf);
if (strstr(buf, "OK"))
break;
else if (sscanf(buf, "* %d FETCH (RFC822.SIZE %d)", &num, &size) == 2)
sizes[num - 1] = size;
else
sizes[num - 1] = -1;
}
return(sizes);
}
}
static imap_is_old(socket, queryctl, num)
int socket;
struct hostrec *queryctl;
int num;
{
char buf [POPBUFSIZE+1];
int ok;
if ((ok = gen_transact(socket, "FETCH %d FLAGS", num)) != 0)
exit(PS_ERROR);
return(seen);
}
static int imap_fetch(socket, number, lenp)
/* request nth message */
int socket;
int number;
int *lenp;
{
char buf [POPBUFSIZE+1];
int num;
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+1];
if (SockGets(socket, buf,sizeof(buf)) < 0)
return(PS_SOCKET);
else
return(0);
}
static imap_delete(socket, queryctl, number)
/* set delete flag for given message */
int socket;
struct hostrec *queryctl;
int number;
{
return(gen_transact(socket, "STORE %d +FLAGS (\\Deleted)", number));
}
const static struct method imap =
{
"IMAP", /* Internet Message Access Protocol */
143, /* standard IMAP2bis/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_getsizes, /* grab message sizes */
imap_is_old, /* no UID check */
imap_fetch, /* request given message */
imap_trail, /* eat message trailer */
imap_delete, /* 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));
}
/* imap.c ends here */
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