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/* Copyright 1993-95 by Carl Harris, Jr. Copyright 1996 by Eric S. Raymond
* All rights reserved.
* For license terms, see the file COPYING in this directory.
*/
/***********************************************************************
module: pop3.c
project: popclient
programmer: Carl Harris, ceharris@mal.com
Hacks and bug fixes by esr.
description: POP3 client code.
***********************************************************************/
#include <config.h>
#include <stdio.h>
#if defined(STDC_HEADERS)
#include <string.h>
#endif
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <sys/time.h>
#include <ctype.h>
#include <errno.h>
#include "socket.h"
#include "popclient.h"
#define POP3_PORT 110
#ifdef HAVE_PROTOTYPES
/* prototypes for internal functions */
int POP3_sendSTAT (int *msgcount, int socket);
int POP3_sendLAST (int *last, int socket);
int POP3_sendUIDL (int num, int socket, char **cp);
int POP3_BuildDigest (char *buf, struct hostrec *options);
#endif
/*********************************************************************
function: POP3_sendSTAT
description: send the STAT command to the POP3 server to find
out how many messages are waiting.
arguments:
count pointer to an integer to receive the message count.
socket socket to which the POP3 server is connected.
return value: return code from POP3_OK.
calls: POP3_OK, SockPrintf
globals: reads outlevel.
*********************************************************************/
int POP3_sendSTAT (msgcount,socket)
int *msgcount;
int socket;
{
int ok;
char buf [POPBUFSIZE];
int totalsize;
SockPrintf(socket,"STAT\r\n");
if (outlevel == O_VERBOSE)
fprintf(stderr,"> STAT\n");
ok = pop3_ok(buf,socket);
if (ok == 0)
sscanf(buf,"%d %d",msgcount,&totalsize);
else if (outlevel > O_SILENT && outlevel < O_VERBOSE)
fprintf(stderr,"%s\n",buf);
return(ok);
}
/******************************************************************
function: POP3_sendLAST
description: send the LAST command to the server, which should
return the number of the last message number retrieved
from the server.
arguments:
last integer buffer to receive last message#
ret. value: zero if success, else status code.
globals: SockPrintf, pop3_ok.
calls: reads outlevel.
*****************************************************************/
int POP3_sendLAST (last, socket)
int *last;
int socket;
{
int ok;
char buf [POPBUFSIZE];
SockPrintf(socket,"LAST\r\n");
if (outlevel == O_VERBOSE)
fprintf(stderr,"> LAST\n");
ok = pop3_ok(buf,socket);
if (ok == 0 && sscanf(buf,"%d",last) == 0)
ok = PS_ERROR;
if (ok != 0 && outlevel > O_SILENT)
fprintf(stderr,"Server says '%s' to LAST command.\n",buf);
return(ok);
}
/******************************************************************
function: POP3_sendUIDL
description: send the UIDL command to the server,
arguments:
num number of message to query (may be -1)
ret. value: zero if success, else status code.
globals: SockPrintf, pop3_ok.
calls: reads outlevel.
*****************************************************************/
int POP3_sendUIDL (num, socket, cp)
int num;
int socket;
char **cp;
{
int ok;
char buf [POPBUFSIZE];
static char id[IDLEN];
(void) strcpy(buf, "UIDL\r\n");
if (num > -1)
(void) sprintf(buf, "UIDL %d\r\n", num);
SockPrintf(socket, buf);
if (outlevel == O_VERBOSE)
fprintf(stderr,"> %s", buf);
ok = pop3_ok(buf,socket);
if (ok != 0 && outlevel > O_SILENT)
fprintf(stderr,"Server says '%s' to UIDL command.\n",buf);
if (cp) {
sscanf(buf, "%*d %s\n", id);
*cp = id;
}
return(ok);
}
/******************************************************************
function: POP3_BuildDigest
description: Construct the MD5 digest for the current session,
using the user-specified password, and the time
stamp in the POP3 greeting.
arguments:
buf greeting string
queryctl merged options record.
ret. value: zero on success, nonzero if no timestamp found in
greeting.
globals: none.
calls: MD5Digest.
*****************************************************************/
#if defined(HAVE_APOP_SUPPORT)
POP3_BuildDigest (buf,queryctl)
char *buf;
struct hostrec *queryctl;
{
char *start,*end;
char *msg;
/* find start of timestamp */
for (start = buf; *start != 0 && *start != '<'; start++)
;
if (*start == 0) {
fprintf(stderr,"Required APOP timestamp not found in greeting\n");
return(-1);
}
/* find end of timestamp */
for (end = start; *end != 0 && *end != '>'; end++)
;
if (*end == 0 || (end - start - 1) == 1) {
fprintf(stderr,"Timestamp syntax error in greeting\n");
return(-1);
}
/* copy timestamp and password into digestion buffer */
msg = (char *) malloc((end-start-1) + strlen(queryctl->password) + 1);
*(++end) = 0;
strcpy(msg,start);
strcat(msg,queryctl->password);
strcpy(queryctl->digest, MD5Digest(msg));
free(msg);
return(0);
}
#endif /* HAVE_APOP_SUPPORT */
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