int
decode_telnet(u_char *buf, int len, u_char *obuf, int olen)
{
if ((len = strip_telopts(buf, len)) == 0)
return (0);
if (!is_ascii_string(buf, len))
return (0);
if (strip_lines(buf, Opt_lines) < 2)
return (0);
strlcpy(obuf, buf, olen);
return (strlen(obuf));
}
int
decode_ftp(u_char *buf, int len, u_char *obuf, int olen)
{
struct buf *line, inbuf, outbuf;
int i, n;
if ((len = strip_telopts(buf, len)) == 0)
return (0);
buf_init(&inbuf, buf, len);
buf_init(&outbuf, obuf, olen);
if (!buf_isascii(&inbuf))
return (0);
n = 0;
while ((i = buf_index(&inbuf, "\n", 1)) != -1) {
line = buf_tok(&inbuf, NULL, i);
buf_skip(&inbuf, 1);
if (i > 0 && line->base[i - 1] == '\r')
line->end--;
line->base[line->end] = '\0';
if (strncasecmp(buf_ptr(line), "USER ", 5) == 0 ||
strncasecmp(buf_ptr(line), "ACCT ", 5) == 0 ||
strncasecmp(buf_ptr(line), "PASS ", 5) == 0) {
buf_putf(&outbuf, "%s\n", buf_ptr(line));
n++;
}
}
if (n < 2) return (0);
buf_end(&outbuf);
return (buf_len(&outbuf));
}
void
do_ftpd(int fd)
{
FILE *f;
char buf[1024];
int len, portcmd = 0;
u_long ip;
u_short port;
if ((f = fdopen(fd, "r+")) == NULL)
return;
fprintf(f, "220 ftpd-ozone ready for love.\r\n");
while (fgets(buf, sizeof(buf), f) != NULL) {
if ((len = strip_telopts(buf, strlen(buf))) == 0)
continue;
if (strncasecmp(buf, "SYST", 4) == 0) {
fprintf(f, "215 ftpd-ozone\r\n");
}
else if (strncasecmp(buf, "USER ", 5) == 0) {
fprintf(f, "331 yo there\r\n");
}
else if (strncasecmp(buf, "PASS ", 5) == 0) {
fprintf(f, "230 sucker\r\n");
}
else if (strncasecmp(buf, "PWD", 3) == 0) {
fprintf(f, "257 \"/\" is current directory\r\n");
}
else if (strncasecmp(buf, "PASV", 4) == 0) {
fprintf(f, "502 try PORT instead ;-)\r\n");
/*fprintf(f, "425 try PORT instead ;-)\r\n");*/
}
else if (strncasecmp(buf, "PORT ", 5) == 0) {
if (portstr2num(buf + 5, &ip, &port) != 0)
fprintf(f, "500 you suk\r\n");
else {
fprintf(f, "200 ready for love\r\n");
if (portcmd++ < 2) /* XXX */
printf(GREEN "try connecting to %s %d" OFF "\n", int_ntoa(ip), port);
}
}
else if (strncasecmp(buf, "CWD ", 4) == 0 ||
strncasecmp(buf, "TYPE ", 5) == 0) {
fprintf(f, "200 whatever\r\n");
}
else if (strncasecmp(buf, "NLST", 4) == 0) {
fprintf(f, "550 you suk\r\n");
}
else if (strncasecmp(buf, "MDTM ", 5) == 0) {
fprintf(f, "213 19960319165527\r\n");
}
else if (strncasecmp(buf, "RETR ", 5) == 0 ||
strncasecmp(buf, "LIST", 4) == 0) {
fprintf(f, "150 walking thru your firewall\r\n");
}
else if (strncasecmp(buf, "QUIT", 4) == 0) {
fprintf(f, "221 l8r\r\n");
break;
}
else fprintf(f, "502 i suk\r\n");
}
fclose(f);
}
