Overloads printf C library functions by a self-contained implementation,
based on klibc. Does not yet feature all the required default formatters,
including those for floating point values.
The flag is required to convince libtool on Cygwin to build DLLs. But on
Windows these shared libraries can not have undefined symbols, so we have to
link them explicitly to the libraries they reference.
For plugins this is currently not done, so only the monolithic build is
supported. The plugin loader wouldn't be able to load DLLs anyway, as
it tries to load files that don't exist on Cygwin.
INCLUDES are now deprecated and throw warnings when using automake 1.13.
We now also differentiate AM_CPPFLAGS and AM_CFLAGS, where includes and
defines are passed to AM_CPPFLAGS only.
Currently we use the very versatile linked-list collection to store elements
with variable count. This is fine, but very inefficient: Due to the many
methods in the linked list, on 64-bit platforms an empty list alone is more
than 200 bytes. As we currently have about 50 lists per IKE_SA/CHILD_SA pair,
this takes up to 10KB just for managing the empty lists. This is about the
half of memory used by an IKE_SA/CHILD_SA pair, and obviously way too much.
The new array type is not an object, but a collection of functions on an
abstract type.
The following lists are per IKE_SA and should be considered for a replacement
with more efficient arrays (this uses load-testers on-demand created dynamic
configurations, other scenarios have different lists):
14 -> ike_sa_create() @ src/libcharon/sa/ike_sa.c:2198
10 -> auth_cfg_create() @ src/libstrongswan/credentials/auth_cfg.c:1088
6 -> task_manager_v2_create() @ src/libcharon/sa/ikev2/task_manager_v2.c:1505
6 -> proposal_create() @ src/libcharon/config/proposal.c:592
5 -> peer_cfg_create() @ src/libcharon/config/peer_cfg.c:657
4 -> child_sa_create() @ src/libcharon/sa/child_sa.c:1090
2 -> child_cfg_create() @ src/libcharon/config/child_cfg.c:536
1 -> ike_cfg_create() @ src/libcharon/config/ike_cfg.c:330
1 -> put_connected_peers() @ src/libcharon/sa/ike_sa_manager.c:854
getaddrinfo(3) may block a long time so proper termination of the daemon may
block if DNS servers are not reachable.
getaddrinfo(3) is an optional cancellation point in posix threads so it
might still block a shutdown but at least on Android (with the signal based
pthread_cancel implementation) it works, on Linux starter will kill charon
anyway after a while.
The invocation of addr2line to resolve backtrace source locations
is slow and cumbersome. When using libbfd directly, we can eliminate
the overhead of the process invocation. Even better, we can cache
library symbol names, bringing wicked fast lookups. As a neat bonus,
we can resolve static function names.
Martin Willi