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2019-02-12slirp: wrap the remaining socket functionsMarc-André Lureau
QEMU wraps the socket functions in os-win32.h, but in commit a9d8b3ec4385793815d71217857304, the header inclusion was dropped, breaking libslirp on Windows. Wrap the missing functions. Rename the wrapped function with "slirp_" prefix and "_wrap" suffix, for consistency and to avoid a clash with existing function (such as "slirp_socket"). Fixes: a9d8b3ec ("slirp: replace remaining qemu headers dependency") Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20190212160953.29051-3-marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Tested-by: Howard Spoelstra
2019-02-12slirp: remove slirp_ prefix for socket wrappersMarc-André Lureau
QEMU wraps the socket functions in os-win32.h, but in commit a9d8b3ec4385793815d71217857304, the header inclusion was dropped, breaking libslirp on Windows. There are already a few socket functions that are wrapped in libslirp, with "slirp_" prefix, but many of them are missing, and we are going to wrap the missing functions in a second patch. Using "slirp_" prefix avoids the conflict with socket function #define wrappers in QEMU os-win32.h, but they are quite intrusive. In the end, the functions should behave the same as original one, but with errno being set. To avoid the churn, and potential confusion, remove the "slirp_" prefix. A series of #undef is necessary until libslirp is made standalone to prevent the #define conflict with QEMU. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20190212160953.29051-2-marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: API is extern CMarc-André Lureau
Make it possible to use headers easily with C++ projects. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: pass opaque to all callbacksMarc-André Lureau
This is friendlier for FFI bindings. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: use polling callbacks, drop glib requirementMarc-André Lureau
It would be legitimate to use libslirp without glib. Let's add_poll/get_revents pair of callbacks to provide the same functionality. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: remove slirp_instances listMarc-André Lureau
Now that polling is done per-instance, we don't need a global list of slirp instances. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace global polling with per-instance & notifierMarc-André Lureau
Remove hard-coded dependency on slirp in main-loop, and use a "poll" notifier instead. The notifier is registered per slirp instance. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: improve send_packet() callbackMarc-André Lureau
Use a more descriptive name for the callback. Reuse the SlirpWriteCb type. Wrap it to check that all data has been written. Return a ssize_t for potential error handling and data-loss reporting. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: prefer c99 types over BSD kindMarc-André Lureau
Replace: - u_char -> uint8_t - u_short -> uint16_t - u_long -> uint32_t - u_int -> unsigned - caddr_t -> char * Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace remaining qemu headers dependencyMarc-André Lureau
Except for the migration code which is gated by WITH_QEMU, only include our own headers, so libslirp can be built standalone. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: Move g_spawn_async_with_fds_qemu compatibility to slirp/Samuel Thibault
Only slirp actually needs it, and will need it along in libslirp. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2019-02-07slirp: replace QEMU_BUILD_BUG_ON with G_STATIC_ASSERTSamuel Thibault
to remove another dependency on qemu. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2019-02-07slirp: replace qemu qtailq with slirp own copyMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace net/eth.h inclusion with own definesMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: remove now useless QEMU headers inclusionsMarc-André Lureau
Some of those could have been squashed earlier, but it is easier to do it all here. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: remove qemu timer.h dependencyMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: add slirp own version of pstrcpyMarc-André Lureau
Remove a dependency on qemu util. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: improve windows headers inclusionMarc-André Lureau
Our API usage requires Vista, set WIN32_LEAN_AND_MEAN to fix a number of issues (winsock2.h include order for ex, which is better to include first for legacy reasons). While at it, group redundants #ifndef _WIN32 blocks. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: do not include qemu headers in libslirp.h public API headerMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: move QEMU state saving to a separate unitMarc-André Lureau
Make state saving optional: this will allow to build SLIRP without QEMU. (eventually, the vmstate helpers will be extracted, so an external project & process could save its state) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace qemu_notify_event() with a callbackMarc-André Lureau
Introduce a SlirpCb callback to kick the main io-thread. Add an intermediary sodrop() function that will call SlirpCb.notify callback when sbdrop() returns true. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: add unregister_poll_fd() callbackMarc-André Lureau
Add a counter-part to register_poll_fd() for completeness. (so far, register_poll_fd() is called only on struct socket fd) Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace qemu_set_nonblock()Marc-André Lureau
Replace qemu_set_nonblock() with slirp_set_nonblock() qemu_set_nonblock() does some event registration with the main loop. Add a new callback register_poll_fd() for that reason. Always build the fd-register stub, to avoid #if WIN32. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace most qemu socket utilities with slirp own versionMarc-André Lureau
qemu_set_nonblock() is slightly more problematic and will be dealt with in a separate patch. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace QEMU_PACKED with SLIRP_PACKEDMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: replace trace functions with DEBUG callsMarc-André Lureau
Remove a dependency on QEMU. Use the existing logging facilities. Set SLIRP_DEBUG=tftp to get tftp log. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: add callbacks for timerMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: generalize guestfwd with a callback based approachMarc-André Lureau
Instead of calling into QEMU chardev directly, and mixing it with slirp_add_exec() handling, add a new function slirp_add_guestfwd() which takes a write callback. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: Don't mark struct ipq or struct ipasfrag as packedPeter Maydell
There is no reason to mark the struct ipq and struct ipasfrag as packed: they are naturally aligned anyway, and are not representing any on-the-wire packet format. Indeed they vary in size depending on the size of pointers on the host system, because the 'struct qlink' members include 'void *' fields. Dropping the 'packed' annotation fixes clang -Waddress-of-packed-member warnings and probably lets the compiler generate better code too. The only thing we do care about in the layout of the struct is that the frag_link matches up with the ipf_link of the struct ipasfrag, as documented in the comment on that struct; assert at build time that this is the case. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: Avoid marking naturally packed structs as QEMU_PACKEDPeter Maydell
Various ipv6 structs in the slirp headers are marked QEMU_PACKED, but they are actually naturally aligned and will have no padding in them. Instead of marking them with the 'packed' attribute, assert at compile time that they are the size we expect. This allows us to take the address of fields within the structs without risking undefined behaviour, and suppresses clang -Waddress-of-packed-member warnings. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-02-07slirp: Avoid unaligned 16bit memory accessSamuel Thibault
pkt parameter may be unaligned, so we must access it byte-wise. This fixes sparc64 host SIGBUS during pxe boot. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2019-01-14slirp: check data length while emulating ident functionPrasad J Pandit
While emulating identification protocol, tcp_emu() does not check available space in the 'sc_rcv->sb_data' buffer. It could lead to heap buffer overflow issue. Add check to avoid it. Reported-by: Kira <864786842@qq.com> Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: Mark debugging calls as unlikelySamuel Thibault
to get them out of the hot path. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2019-01-14slirp: call into g_debug() for DEBUG macrosMarc-André Lureau
Make slirp use GLib logging, instead of fprintf(), so that applications can filter log, process it etc. With recent versions of glib, G_MESSAGES_DEBUG must be set to "all" or "Slirp" to see slirp debug messages. Reformat DEBUG_MISC & DEBUG_ERROR calls to not need \n ending. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: set G_LOG_DOMAINMarc-André Lureau
We are moving to g_log() facilities to log errors and probably debug messages too. Let's have the "Slirp" prefix on messages slirp produces. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14build-sys: use a separate slirp-obj-y && slirp.moMarc-André Lureau
This will allow to have cflags for the whole slirp.mo -objs. It makes it possible to build tests that links only with slirp-obj-y (and not the whole common-obj). It is also a step towards building slirp as a shared library, although this requires a bit more thoughts to build with net/slirp.o (CONFIG_SLIRP would need to be 'm') and other build issues. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: add clock_get_ns() callbackMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: factor out guestfwd addition checksMarc-André Lureau
This will allow reusing the function in a following patch. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: replace DEBUG_ARGS with DEBUG_ARGMarc-André Lureau
There is no clear benefit in calling an alias DEBUG_ARGS(). Replace calls with DEBUG_ARG(), and fix the white-spacing while at it. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: remove remaining DEBUG blocksMarc-André Lureau
Instead, rely on slirp_debug flags, or compile unconditionally (the substraction in cksum is unlikely to affect any benchmark result). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: use %p for pointers formatMarc-André Lureau
This fixes some compilation warnings on mingw64. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: introduce SLIRP_DEBUG environment variableMarc-André Lureau
Learn to read SLIRP_DEBUG=call,misc,error (all or help also handled) to set the slirp_debug flags. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: always build with debug statementsMarc-André Lureau
Make debug statements condiitonal only on slirp_debug flags, instead of the pre-processor DEBUG blocks, as it may introduce breakage easily, since the debug code isn't always compiled. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: no need to make DPRINTF conditional on DEBUGMarc-André Lureau
DEBUG_CALL is already handled conditionally. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: replace a DEBUG block with WITH_ICMP_ERROR_MSGMarc-André Lureau
icmp_send_error() doesnt actually log messages when DEBUG is enabled. Let's use a different define that describes better the tweaked behaviour of the function, and avoid uncompiled code. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: replace some fprintf() with DEBUG_MISCMarc-André Lureau
Remove some clutter, and avoids direct call to fprintf(). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: replace a fprintf with g_critical()Marc-André Lureau
Reduce dependency on QEMU. QEMU could use a custom glib log handler if it wants to redirect/filter it. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: use virtual time for packet expirationMarc-André Lureau
Make all packets expiration time based on virtual clock. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: rename exec_listMarc-André Lureau
This list is not only used to handle command to execute on guest connection, it can also redirect to an arbitrary object, such as a chardev. Let's rename the struct and the field to "guestfwd". Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
2019-01-14slirp: drop <Vista compatibilityMarc-André Lureau
Since commit 12f8def0e02232d7c6416ad9b66640f973c531d1 (v2.9), qemu requires Vista. Let's remove some conditional code. Note that this introduces a missing declaration warning with mingw. warning: implicit declaration of function 'inet_ntop' See also: https://sourceforge.net/p/mingw-w64/mailman/message/36473782/ We could workaround it by declaring it ourself depending on __MINGW64_VERSION_*: WINSOCK_API_LINKAGE INT WSAAPI inet_pton(int Family, PCTSTR pszAddrString, PVOID pAddrBuf); Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
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