book:
From
Nmap output examples in this book usually include a version number
near the top, and they may not work with older versions.
to
Nmap output examples in this book may not match the output produced by
older versions.
packet is OK from the get-go rather than running basic checks of it's own.
In a nutshell this patch checks to make sure:
1) there is enough room for an IP header in the amount of bytes read
2) the IP version number is correct
3) the IP length fields are at least as big as the standard header
4) the IP packet received isn't a fragment, or is the initial fragment
5) that next level headers seem reasonable
For TCP, this checks that there is enough room for the header in the number
of bytes read, and that any option lengths are correct. The options checked
are MSS, WScale, SackOK, Sack, and Timestamp.
This also fixes a bug I discovered while testing. Since the Ethernet CRC
(and other datalink-layer data) could be read and counted, it was being
returned that there was more IP packet than there really was. This didn't
cause an overrun of the buffer or anything, just that garbage data could have
easily been read instead of real packet data. Now, if validity is checked for
and the number of total bytes read is larger than the IP's length, the length
is set to the IP header's total length field.
This seems to work great after doing what testing I could. It's been out on
nmap-dev for a couple of weeks without any bad reports (none at all for that
matter). I reviewed this patch again before committing and it looks good as
well.
and closed ports. [Vladimir]
o Fixed the "resolution errors not showing up" bug. Actually, from now
on, all errors will be displayed properly in the Zenmap window, since
stderr is also redirected there (until now, only stdout was
displayed). [Vladimir]
Visual C++ 2008 runtime components if they aren't already installed
on a system. These are some reasonably small DLLs that are
generally necessary for applications compiled with Visual C++ (with
dynamic linking). Many or most systems already have these installed
from other software packages. The lack of these components led to
the error message "The Application failed to intialize properly
(0xc0150002)." with Nmap 4.65. A related change is that Nmap on
Windows is now compiled with /MD rather than /MT so that it
consistently uses these runtime libraries. The patch was created by
Rob Nicholls.
prevent error messages like: "log_vwrite: vnsprintf failed. Even after
increasing bufferlen to 819200, Vsnprintf returned -1 (logt == 1)."
Thanks to prozente0 for the report.
