decode_nntp.c

Go to the documentation of this file.

/*
 * decode_nntp.c
 *
 * Network News Transport Protocol.
 *
 * Copyright (c) 2000 Felix von Leitner <felix@convergence.de>
 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
 *
 * $Id: decode_nntp.c,v 1.5 2001/03/15 08:33:01 dugsong Exp $
 */
 
#include "config.h"
 
#include <sys/types.h>
 
#include <stdio.h>
#include <string.h>
 
#include "base64.h"
#include "decode.h"
 
int
decode_nntp(u_char *buf, int len, u_char *obuf, int olen)
{
    char *p;
    int i, simple, dpa;
    
    obuf[0] = '\0';
    simple = dpa = 0;
    
    for (p = strtok(buf, "\r\n"); p != NULL; p = strtok(NULL, "\r\n")) {
        if (simple == 1) {
            strlcat(obuf, p, olen);
            strlcat(obuf, "\n", olen);
            simple = 0;
        }           
        else if (strncasecmp(p, "AUTHINFO ", 9) == 0) {
            strlcat(obuf, p, olen);
            
            if (strncasecmp(p + 9, "SIMPLE", 6) == 0) {
                simple = 1;
            }
            else if (strncasecmp(p + 9, "GENERIC ", 8) == 0) {
                if (strncasecmp(p + 17, "DPA", 3) == 0) {
                    dpa = 1;
                }
                else if (dpa == 1) {
                    p += 17;
                    i = base64_pton(p, p, strlen(p));
                    p[i] = '\0';
                    i = strlen(obuf);
                    snprintf(obuf + i, olen - i,
                         " [%s]", p);
                }
            }
            strlcat(obuf, "\n", olen);
        }
    }
    return (strlen(obuf));
}