decode_smtp.c

Go to the documentation of this file.

/*
 * decode_smtp.c
 *
 * Simple Mail Transfer Protocol.
 *
 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
 *
 * $Id: decode_smtp.c,v 1.3 2001/03/15 08:33:02 dugsong Exp $
 */
 
#include "config.h"
 
#include <sys/types.h>
 
#include <stdio.h>
#include <string.h>
 
#include "base64.h"
#include "options.h"
#include "decode.h"
 
int
decode_smtp(u_char *buf, int len, u_char *obuf, int olen)
{
    char *p;
    int i, j, login = 0;
    
    obuf[0] = '\0';
    
    for (p = strtok(buf, "\r\n"); p != NULL; p = strtok(NULL, "\r\n")) {
        if (login == 1) {
            strlcat(obuf, p, olen);
            i = base64_pton(p, p, strlen(p));
            p[i] = '\0';
            j = strlen(obuf);
            snprintf(obuf + j, olen - j, " [%s]\n", p);
            login = 0;
        }
        else if (strncmp(p, "AUTH LOGIN ", 11) == 0) {
            strlcat(obuf, p, olen);
            p += 11;
            i = base64_pton(p, p, strlen(p));
            p[i] = '\0';
            j = strlen(obuf);
            snprintf(obuf + j, olen - j, " [%s]\n", p);
            login = 1;
        }
        else if (strncmp(p, "MAIL ", 5) == 0 ||
             strncmp(p, "RCPT ", 5) == 0 ||
             strncmp(p, "DATA", 4) == 0) {
            break;
        }
    }
    return (strlen(obuf));
}