Initial implementation for ares_getaddrinfo(). It is NOT compliant with RFC6724, though
it is expected to come closer to conformance prior to the next release.
Features not supported include sorted addresses and honoring of service and hints
parameters.
Implementation by: Christian Ammer (@ChristianAmmer)
Quoting RFC 7686:
Name Resolution APIs and Libraries (...) MUST either respond
to requests for .onion names by resolving them according to
[tor-rendezvous] or by responding with NXDOMAIN.
A legacy client may inadvertently attempt to resolve a .onion
name through the DNS. This causes a disclosure that the client
is attempting to use Tor to reach a specific service. Malicious
resolvers could be engineered to capture and record such leaks,
which might have very adverse consequences for the well-being
of the user.
Bug: #196
Fix By: Ben Noordhuis @bnoordhuis
Add a new ares_library_init_mem() initialization function for the
library which allows the library user to specify their own malloc,
realloc & free equivalents for use library-wide.
Store these function pointers in library-wide global variables,
defaulting to libc's malloc(), realloc() and free().
Change all calls to malloc, realloc and free to use the function pointer
instead. Also ensure that ares_strdup() is always available
(even if the local environment includes strdup(3)), and change the
library code to always use it.
Convert calls to calloc() to use ares_malloc() + memset
We noticed a small buglet in ares_search() when it gets an empty string
as input -- the single_domain() utility function in ares_search.c
accesses invalid memory (before the start of the string).
ares__read_line returns ARES_EOF when it reaches the end of the
file. This will happen every time when reading to the end of the
HOSTALIASES file. Unfortunately single_domain treats this error as
being fatal.
Signed-off-by: Mike Crowe <mac@mcrowe.com>
check for ssize_t to make it possible to use that when receiving the send()
error code. This is necessary to prevent compiler warnings on some systems.
- Made configure create config.h, and all source files now include setup.h that
might include the proper config.h (or a handicrafted alternative).
- Switched to 'ares_socket_t' type for sockets in ares, since Windows don't
use 'int' for that.
- automake-ified and libool-ified c-ares. Now it builds libcares as a shared
lib on most platforms if wanted. (This bloated the size of the release
archive with another 200K!)
- Makefile.am now uses Makefile.inc for the c sources, h headers and man
pages, to make it easier for other makefiles to use the exact same set of
files.
- Adjusted 'maketgz' to use the new automake magic when building distribution
archives.
Christian Ammer
Ben Noordhuis
David Drysdale
Yang Tse
Mike Crowe
Daniel Stenberg
Gisle Vanem
Steinar H. Gunderson