file again when it needs it. This is called from nmap_free_mem, because
cp_free (also called by nmap_free_mem) invalidates members of the
services data structures.
In normal use this doesn't matter. It only matters when reinvoking the
engine several times with --interactive.
a layer 4 protocol used mostly for telephony related applications.
This brings the following new features:
o SCTP INIT chunk port scan (-sY): open ports return an INIT-ACK
chunk, closed ones an ABORT chunk. This is the SCTP equivalent
of a TCP SYN stealth scan.
o SCTP COOKIE-ECHO chunk port scan (-sZ): open ports are silent,
closed ports return an ABORT chunk.
o SCTP INIT chunk ping probes (-PY): host discovery using SCTP
INIT chunk packets.
o SCTP-specific IP protocol scan (-sO -p sctp).
o SCTP-specific traceroute support (--traceroute).
o The ability to use the deprecated Adler32 algorithm as specified
in RFC 2960 instead of CRC32C from RFC 4960 (--adler32).
o 42 well-known SCTP ports were added to the nmap-services file.
Part of the work on SCTP support was kindly sponsored by
Compass Security AG, Switzerland. [Daniel Roethlisberger]
instead of a custom hash table and an STL list instead of a custom linked list.
The biggest gain comes from using the list.sort method rather than inserting
ports in sorted order (equivalent to insertion sort). The new code passes
Doug's p-switch-tests.
Here are time comparisons, using the old and new services code, and using the
standard nmap-services file and the 65535-port nmap-services-huge. The times
are the duration of the call to nmap_services_init. Three trials were done for
each case, except for the old-code/nmap-services-huge case.
nmap-services:
old code: 0.215 0.201 0.227 (average 0.214 s)
new code: 0.025 0.022 0.023 (average 0.023 s)
nmap-services-huge:
old code: 441.014 (average 441.014 s)
new code: 0.984 0.975 0.978 (average 0.979 s)
Previously the ping probe data structures were stored in NmapOps,
now they will be stored in the scan_lists struct. All other changes
auxiliary to this reorganization.
