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/* $OpenBSD: pop_trans.c,v 1.3 2002/09/06 19:17:52 deraadt Exp $ */
/*
* TRANSACTION state handling.
*/
#include <sys/types.h>
#include <stdio.h>
#include <syslog.h>
#include "params.h"
#include "protocol.h"
#include "database.h"
#include "mailbox.h"
static int pop_trans_quit(char *params)
{
if (params) return POP_ERROR;
return POP_STATE;
}
static int pop_trans_noop(char *params)
{
if (params) return POP_ERROR;
return POP_OK;
}
static int pop_trans_stat(char *params)
{
if (params) return POP_ERROR;
if (pop_reply("+OK %d %ld", db.visible_count, db.visible_size))
return POP_CRASH_NETFAIL;
return POP_QUIET;
}
static int pop_trans_list_or_uidl(char *params, int uidl)
{
int number;
struct db_message *msg;
if (params) {
number = pop_get_int(¶ms);
if (number < 1 || number > db.total_count || params)
return POP_ERROR;
msg = db.array[number - 1];
if (msg->flags & MSG_DELETED) return POP_ERROR;
if (uidl) {
if (pop_reply("+OK %d "
"%02x%02x%02x%02x%02x%02x%02x%02x",
number,
msg->hash[3], msg->hash[2],
msg->hash[1], msg->hash[0],
msg->hash[7], msg->hash[6],
msg->hash[5], msg->hash[4]))
return POP_CRASH_NETFAIL;
} else
if (pop_reply("+OK %d %ld", number, msg->size))
return POP_CRASH_NETFAIL;
return POP_QUIET;
}
if (pop_reply_ok()) return POP_CRASH_NETFAIL;
for (number = 1; number <= db.total_count; number++) {
msg = db.array[number - 1];
if (msg->flags & MSG_DELETED) continue;
if (uidl) {
if (pop_reply("%d "
"%02x%02x%02x%02x%02x%02x%02x%02x",
number,
msg->hash[3], msg->hash[2],
msg->hash[1], msg->hash[0],
msg->hash[7], msg->hash[6],
msg->hash[5], msg->hash[4]))
return POP_CRASH_NETFAIL;
} else
if (pop_reply("%d %ld", number, msg->size))
return POP_CRASH_NETFAIL;
}
if (pop_reply_terminate()) return POP_CRASH_NETFAIL;
return POP_QUIET;
}
static int pop_trans_list(char *params)
{
return pop_trans_list_or_uidl(params, 0);
}
static int pop_trans_uidl(char *params)
{
return pop_trans_list_or_uidl(params, 1);
}
static int pop_trans_retr(char *params)
{
int number;
struct db_message *msg;
int event;
number = pop_get_int(¶ms);
if (number < 1 || number > db.total_count || params) return POP_ERROR;
msg = db.array[number - 1];
if (msg->flags & MSG_DELETED) return POP_ERROR;
if ((event = mailbox_get(msg, -1)) != POP_OK) return event;
#if POP_SUPPORT_LAST
if (number > db.last) db.last = number;
#endif
return POP_QUIET;
}
static int pop_trans_top(char *params)
{
int number, lines;
struct db_message *msg;
int event;
number = pop_get_int(¶ms);
if (number < 1 || number > db.total_count) return POP_ERROR;
lines = pop_get_int(¶ms);
if (lines < 0 || params) return POP_ERROR;
msg = db.array[number - 1];
if (msg->flags & MSG_DELETED) return POP_ERROR;
if ((event = mailbox_get(msg, lines)) != POP_OK) return event;
return POP_QUIET;
}
static int pop_trans_dele(char *params)
{
int number;
struct db_message *msg;
number = pop_get_int(¶ms);
if (number < 1 || number > db.total_count || params) return POP_ERROR;
msg = db.array[number - 1];
if (db_delete(msg)) return POP_ERROR;
#if POP_SUPPORT_LAST
if (number > db.last) db.last = number;
#endif
return POP_OK;
}
static int pop_trans_rset(char *params)
{
struct db_message *msg;
if (params) return POP_ERROR;
if ((msg = db.head))
do {
msg->flags &= ~MSG_DELETED;
} while ((msg = msg->next));
db.visible_count = db.total_count;
db.visible_size = db.total_size;
db.flags &= ~DB_DIRTY;
#if POP_SUPPORT_LAST
db.last = 0;
#endif
return POP_OK;
}
#if POP_SUPPORT_LAST
static int pop_trans_last(char *params)
{
if (params) return POP_ERROR;
if (pop_reply("+OK %d", db.last)) return POP_CRASH_NETFAIL;
return POP_QUIET;
}
#endif
static struct pop_command pop_trans_commands[] = {
{"QUIT", pop_trans_quit},
{"NOOP", pop_trans_noop},
{"STAT", pop_trans_stat},
{"LIST", pop_trans_list},
{"UIDL", pop_trans_uidl},
{"RETR", pop_trans_retr},
{"TOP", pop_trans_top},
{"DELE", pop_trans_dele},
{"RSET", pop_trans_rset},
#if POP_SUPPORT_LAST
{"LAST", pop_trans_last},
#endif
{NULL}
};
static int db_load(char *spool, char *mailbox)
{
db_init();
if (mailbox_open(spool, mailbox)) return 1;
if (db_fix()) {
mailbox_close();
return 1;
}
return 0;
}
int do_pop_trans(char *spool, char *mailbox)
{
int result;
if (!pop_sane()) return 1;
if (db_load(spool, mailbox)) {
syslog(SYSLOG_PRI_HI,
"Failed or refused to load %s/%s",
spool, mailbox);
pop_reply_error();
return 0;
}
syslog(SYSLOG_PRI_LO, "%d message%s (%ld byte%s) loaded",
db.total_count, db.total_count == 1 ? "" : "s",
db.total_size, db.total_size == 1 ? "" : "s");
if (pop_reply_ok())
result = POP_CRASH_NETFAIL;
else
switch ((result = pop_handle_state(pop_trans_commands))) {
case POP_STATE:
if (mailbox_update()) {
if (db.flags & DB_STALE) break;
syslog(SYSLOG_PRI_ERROR,
"Failed to update %s/%s",
spool, mailbox);
pop_reply_error();
break;
}
syslog(SYSLOG_PRI_LO, "%d (%ld) deleted, %d (%ld) left",
db.total_count - db.visible_count,
db.total_size - db.visible_size,
db.visible_count,
db.visible_size);
pop_reply_ok();
break;
case POP_CRASH_NETFAIL:
syslog(SYSLOG_PRI_LO, "Premature disconnect");
break;
case POP_CRASH_NETTIME:
syslog(SYSLOG_PRI_LO, "Connection timed out");
}
if (db.flags & DB_STALE)
syslog(SYSLOG_PRI_LO, "Another MUA active, giving up");
else
if (result == POP_CRASH_SERVER)
syslog(SYSLOG_PRI_ERROR,
"Server failure accessing %s/%s",
spool, mailbox);
mailbox_close();
return 0;
}
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