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2020-05-20qemu-sockets: add abstract UNIX domain socket supportxiaoqiang zhao
unix_listen/connect_saddr now support abstract address types two aditional BOOL switches are introduced: tight: whether to set @addrlen to the minimal string length, or the maximum sun_path length. default is TRUE abstract: whether we use abstract address. default is FALSE cli example: -monitor unix:/tmp/unix.socket,abstract,tight=off OR -chardev socket,path=/tmp/unix.socket,id=unix1,abstract,tight=on Signed-off-by: xiaoqiang zhao <zxq_yx_007@163.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2020-05-04Compress lines for immediate returnSimran Singhal
Compress two lines into a single line if immediate return statement is found. It also remove variables progress, val, data, ret and sock as they are no longer needed. Remove space between function "mixer_load" and '(' to fix the checkpatch.pl error:- ERROR: space prohibited between function name and open parenthesis '(' Done using following coccinelle script: @@ local idexpression ret; expression e; @@ -ret = +return e; -return ret; Signed-off-by: Simran Singhal <singhalsimran0@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20200401165314.GA3213@simran-Inspiron-5558> [lv: in handle_aiocb_write_zeroes_unmap() move "int ret" inside the #ifdef] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-09-25util/qemu-sockets: fix keep_alive handling in inet_connect_saddrVladimir Sementsov-Ogievskiy
In "if (saddr->keep_alive) {" we may already be on error path, with invalid sock < 0. Fix it by returning error earlier. Reported-by: Coverity (CID 1405300) Fixes: aec21d31756cbd Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20190910075943.12977-1-vsementsov@virtuozzo.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
2019-09-03socket: Add backlog parameter to socket_listenJuan Quintela
Current parameter was always one. We continue with that value for now in all callers. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> --- Moved trace to socket_listen
2019-08-15qapi: Add InetSocketAddress member keep-aliveVladimir Sementsov-Ogievskiy
It's needed to provide keepalive for nbd client to track server availability. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20190725094937.32454-1-vsementsov@virtuozzo.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Acked-by: Daniel P. Berrangé <berrange@redhat.com> [eblake: Fix error message typo] Signed-off-by: Eric Blake <eblake@redhat.com>
2019-06-12Include qemu-common.h exactly where neededMarkus Armbruster
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
2019-05-10util: simplify unix_listen()Marc-André Lureau
The only caller of unix_listen() left is qga/channel-posix.c. There is no need to deal with legacy coma-trailing options ",...". Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-id: 20190503130034.24916-6-marcandre.lureau@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2019-05-03sockets: avoid string truncation warnings when copying UNIX pathDaniel P. Berrangé
In file included from /usr/include/string.h:494, from include/qemu/osdep.h:101, from util/qemu-sockets.c:18: In function ‘strncpy’, inlined from ‘unix_connect_saddr.isra.0’ at util/qemu-sockets.c:925:5: /usr/include/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ specified bound 108 equals destination size [-Wstringop-truncation] 106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function ‘strncpy’, inlined from ‘unix_listen_saddr.isra.0’ at util/qemu-sockets.c:880:5: /usr/include/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ specified bound 108 equals destination size [-Wstringop-truncation] 106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We are already validating the UNIX socket path length earlier in the functions. If we save this string length when we first check it, then we can simply use memcpy instead of strcpy later, avoiding the gcc truncation warnings. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20190501145052.12579-1-berrange@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-01-11avoid TABs in files that only contain a fewPaolo Bonzini
Most files that have TABs only contain a handful of them. Change them to spaces so that we don't confuse people. disas, standard-headers, linux-headers and libdecnumber are imported from other projects and probably should be exempted from the check. Outside those, after this patch the following files still contain both 8-space and TAB sequences at the beginning of the line. Many of them have a majority of TABs, or were initially committed with all tabs. bsd-user/i386/target_syscall.h bsd-user/x86_64/target_syscall.h crypto/aes.c hw/audio/fmopl.c hw/audio/fmopl.h hw/block/tc58128.c hw/display/cirrus_vga.c hw/display/xenfb.c hw/dma/etraxfs_dma.c hw/intc/sh_intc.c hw/misc/mst_fpga.c hw/net/pcnet.c hw/sh4/sh7750.c hw/timer/m48t59.c hw/timer/sh_timer.c include/crypto/aes.h include/disas/bfd.h include/hw/sh4/sh.h libdecnumber/decNumber.c linux-headers/asm-generic/unistd.h linux-headers/linux/kvm.h linux-user/alpha/target_syscall.h linux-user/arm/nwfpe/double_cpdo.c linux-user/arm/nwfpe/fpa11_cpdt.c linux-user/arm/nwfpe/fpa11_cprt.c linux-user/arm/nwfpe/fpa11.h linux-user/flat.h linux-user/flatload.c linux-user/i386/target_syscall.h linux-user/ppc/target_syscall.h linux-user/sparc/target_syscall.h linux-user/syscall.c linux-user/syscall_defs.h linux-user/x86_64/target_syscall.h slirp/cksum.c slirp/if.c slirp/ip.h slirp/ip_icmp.c slirp/ip_icmp.h slirp/ip_input.c slirp/ip_output.c slirp/mbuf.c slirp/misc.c slirp/sbuf.c slirp/socket.c slirp/socket.h slirp/tcp_input.c slirp/tcpip.h slirp/tcp_output.c slirp/tcp_subr.c slirp/tcp_timer.c slirp/tftp.c slirp/udp.c slirp/udp.h target/cris/cpu.h target/cris/mmu.c target/cris/op_helper.c target/sh4/helper.c target/sh4/op_helper.c target/sh4/translate.c tcg/sparc/tcg-target.inc.c tests/tcg/cris/check_addo.c tests/tcg/cris/check_moveq.c tests/tcg/cris/check_swap.c tests/tcg/multiarch/test-mmap.c ui/vnc-enc-hextile-template.h ui/vnc-enc-zywrle.h util/envlist.c util/readline.c The following have only TABs: bsd-user/i386/target_signal.h bsd-user/sparc64/target_signal.h bsd-user/sparc64/target_syscall.h bsd-user/sparc/target_signal.h bsd-user/sparc/target_syscall.h bsd-user/x86_64/target_signal.h crypto/desrfb.c hw/audio/intel-hda-defs.h hw/core/uboot_image.h hw/sh4/sh7750_regnames.c hw/sh4/sh7750_regs.h include/hw/cris/etraxfs_dma.h linux-user/alpha/termbits.h linux-user/arm/nwfpe/fpopcode.h linux-user/arm/nwfpe/fpsr.h linux-user/arm/syscall_nr.h linux-user/arm/target_signal.h linux-user/cris/target_signal.h linux-user/i386/target_signal.h linux-user/linux_loop.h linux-user/m68k/target_signal.h linux-user/microblaze/target_signal.h linux-user/mips64/target_signal.h linux-user/mips/target_signal.h linux-user/mips/target_syscall.h linux-user/mips/termbits.h linux-user/ppc/target_signal.h linux-user/sh4/target_signal.h linux-user/sh4/termbits.h linux-user/sparc64/target_syscall.h linux-user/sparc/target_signal.h linux-user/x86_64/target_signal.h linux-user/x86_64/termbits.h pc-bios/optionrom/optionrom.h slirp/mbuf.h slirp/misc.h slirp/sbuf.h slirp/tcp.h slirp/tcp_timer.h slirp/tcp_var.h target/i386/svm.h target/sparc/asi.h target/xtensa/core-dc232b/xtensa-modules.inc.c target/xtensa/core-dc233c/xtensa-modules.inc.c target/xtensa/core-de212/core-isa.h target/xtensa/core-de212/xtensa-modules.inc.c target/xtensa/core-fsf/xtensa-modules.inc.c target/xtensa/core-sample_controller/core-isa.h target/xtensa/core-sample_controller/xtensa-modules.inc.c target/xtensa/core-test_kc705_be/core-isa.h target/xtensa/core-test_kc705_be/xtensa-modules.inc.c tests/tcg/cris/check_abs.c tests/tcg/cris/check_addc.c tests/tcg/cris/check_addcm.c tests/tcg/cris/check_addoq.c tests/tcg/cris/check_bound.c tests/tcg/cris/check_ftag.c tests/tcg/cris/check_int64.c tests/tcg/cris/check_lz.c tests/tcg/cris/check_openpf5.c tests/tcg/cris/check_sigalrm.c tests/tcg/cris/crisutils.h tests/tcg/cris/sys.c tests/tcg/i386/test-i386-ssse3.c ui/vgafont.h Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20181213223737.11793-3-pbonzini@redhat.com> Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Acked-by: Eric Blake <eblake@redhat.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-03-13sockets: allow SocketAddress 'fd' to reference numeric file descriptorsDaniel P. Berrange
The SocketAddress 'fd' kind accepts the name of a file descriptor passed to the monitor with the 'getfd' command. This makes it impossible to use the 'fd' kind in cases where a monitor is not available. This can apply in handling command line argv at startup, or simply if internal code wants to use SocketAddress and pass a numeric FD it has acquired from elsewhere. Fortunately the 'getfd' command mandated that the FD names must not start with a leading digit. We can thus safely extend semantics of the SocketAddress 'fd' kind, to allow a purely numeric name to reference an file descriptor that QEMU already has open. There will be restrictions on when each kind can be used. In codepaths where we are handling a monitor command (ie cur_mon != NULL), we will only support use of named file descriptors as before. Use of FD numbers is still not permitted for monitor commands. In codepaths where we are not handling a monitor command (ie cur_mon == NULL), we will not support named file descriptors. Instead we can reference FD numers explicitly. This allows the app spawning QEMU to intentionally "leak" a pre-opened socket to QEMU and reference that in a SocketAddress definition, or for code inside QEMU to pass pre-opened FDs around. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2018-03-13sockets: check that the named file descriptor is a socketDaniel P. Berrange
The SocketAddress struct has an "fd" type, which references the name of a file descriptor passed over the monitor using the "getfd" command. We currently blindly assume the FD is a socket, which can lead to hard to diagnose errors later. This adds an explicit check that the FD is actually a socket to improve the error diagnosis. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2018-03-13sockets: move fd_is_socket() into common sockets codeDaniel P. Berrange
The fd_is_socket() helper method is useful in a few places, so put it in the common sockets code. Make the code more compact while moving it. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2018-03-02Include less of the generated modular QAPI headersMarkus Armbruster
In my "build everything" tree, a change to the types in qapi-schema.json triggers a recompile of about 4800 out of 5100 objects. The previous commit split up qmp-commands.h, qmp-event.h, qmp-visit.h, qapi-types.h. Each of these headers still includes all its shards. Reduce compile time by including just the shards we actually need. To illustrate the benefits: adding a type to qapi/migration.json now recompiles some 2300 instead of 4800 objects. The next commit will improve it further. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180211093607.27351-24-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> [eblake: rebase to master] Signed-off-by: Eric Blake <eblake@redhat.com>
2018-02-05sockets: fix parsing of ipv4/ipv6 opts in parse_socket_addrDaniel P. Berrange
The inet_parse() function looks for 'ipv4' and 'ipv6' flags, but only treats them as bare bool flags. The normal QemuOpts parsing would allow on/off values to be set too. This updates inet_parse() so that its handling of the 'ipv4' and 'ipv6' flags matches that done by QemuOpts. This impacts the NBD block driver parsing the legacy filename syntax and the migration code parsing the socket scheme. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20180125171412.21627-1-berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21sockets: remove obsolete code that updated listen addressDaniel P. Berrange
When listening on unix/tcp sockets there was optional code that would update the original SocketAddress struct with the info about the actual address that was listened on. Since the conversion of everything to QIOChannelSocket, no remaining caller made use of this feature. It has been replaced with the ability to query the listen address after the fact using the function qio_channel_socket_get_local_address. This is a better model when the input address can result in listening on multiple distinct sockets. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-Id: <20171212111219.32601-1-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-18misc: remove duplicated includesPhilippe Mathieu-Daudé
exec: housekeeping (funny since 02d0e095031) applied using ./scripts/clean-includes Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-11-28sockets: avoid crash when cleaning up sockets for an invalid FDDaniel P. Berrange
If socket_listen_cleanup is passed an invalid FD, then querying the socket local address will fail. We must thus be prepared for the returned addr to be NULL Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-11-07sockets: avoid leak of listen file descriptorDaniel P. Berrange
If we iterate over the full port range without successfully binding+listening on the socket, we'll try the next address, whereupon we overwrite the slisten file descriptor variable without closing it. Rather than having two places where we open + close socket FDs on different iterations of nested for loops, re-arrange the code to always open+close within the same loop iteration. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-10-16sockets: Handle race condition between binds to the same portKnut Omang
If an offset of ports is specified to the inet_listen_saddr function(), and two or more processes tries to bind from these ports at the same time, occasionally more than one process may be able to bind to the same port. The condition is detected by listen() but too late to avoid a failure. This function is called by socket_listen() and used by all socket listening code in QEMU, so all cases where any form of dynamic port selection is used should be subject to this issue. Add code to close and re-establish the socket when this condition is observed, hiding the race condition from the user. Also clean up some issues with error handling to allow more accurate reporting of the cause of an error. This has been developed and tested by means of the test-listen unit test in the previous commit. Enable the test for make check now that it passes. Reviewed-by: Bhavesh Davda <bhavesh.davda@oracle.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by: Girish Moodalbail <girish.moodalbail@oracle.com> Signed-off-by: Knut Omang <knut.omang@oracle.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-10-16sockets: factor out create_fast_reuse_socketKnut Omang
Another refactoring step to prepare for fixing the problem exposed with the test-listen test in the previous commit Signed-off-by: Knut Omang <knut.omang@oracle.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-10-16sockets: factor out a new try_bind() functionKnut Omang
A refactoring step to prepare for the problem exposed by the test-listen test in the previous commit. Simplify and reorganize the IPv6 specific extra measures and move it out of the for loop to increase code readability. No semantic changes. Signed-off-by: Knut Omang <knut.omang@oracle.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-09-05util: remove the obsolete non-blocking connectCao jin
The non-blocking connect mechanism is obsolete, and it doesn't work well in inet connection, because it will call getaddrinfo first and getaddrinfo will blocks on DNS lookups. Since commit e65c67e4 & d984464e, the non-blocking connect of migration goes through QIOChannel in a different manner(using a thread), and nobody use this old non-blocking connect anymore. Any newly written code which needs a non-blocking connect should use the QIOChannel code, so we can drop NonBlockingConnectHandler as a concept entirely. Suggested-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-14sockets: ensure we don't accept IPv4 clients when IPv4 is disabledDaniel P. Berrange
Currently if you disable listening on IPv4 addresses, via the CLI flag ipv4=off, we still mistakenly accept IPv4 clients via the IPv6 listener socket due to IPV6_V6ONLY flag being unset. We must ensure IPV6_V6ONLY is always set if ipv4=off This fixes the following scenarios -incoming tcp::9000,ipv6=on -incoming tcp:[::]:9000,ipv6=on -chardev socket,id=cdev0,host=,port=9000,server,nowait,ipv4=off -chardev socket,id=cdev0,host=,port=9000,server,nowait,ipv6=on -chardev socket,id=cdev0,host=::,port=9000,server,nowait,ipv4=off -chardev socket,id=cdev0,host=::,port=9000,server,nowait,ipv6=on which all mistakenly accepted IPv4 clients Acked-by: Gerd Hoffmann <kraxel@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-14sockets: don't block IPv4 clients when listening on "::"Daniel P. Berrange
When inet_parse() parses the hostname, it is forcing the has_ipv6 && ipv6 flags if the address contains a ":". This means that if the user had set the ipv4=on flag, to try to restrict the listener to just ipv4, an error would not have been raised. eg -incoming tcp:[::]:9000,ipv4 should have raised an error because listening for IPv4 on "::" is a non-sensical combination. With this removed, we now call getaddrinfo() on "::" passing PF_INET and so getaddrinfo reports an error about the hostname being incompatible with the requested protocol: qemu-system-x86_64: -incoming tcp:[::]:9000,ipv4: address resolution failed for :::9000: Address family for hostname not supported Likewise it is explicitly setting the has_ipv4 & ipv4 flags when the address contains only digits + '.'. This has no ill-effect, but also has no benefit, so is removed. Acked-by: Gerd Hoffmann <kraxel@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-14sockets: ensure we can bind to both ipv4 & ipv6 separatelyDaniel P. Berrange
When binding to an IPv6 socket we currently force the IPV6_V6ONLY flag to off. This means that the IPv6 socket will accept both IPv4 & IPv6 sockets when QEMU is launched with something like -vnc :::1 While this is good for that case, it is bad for other cases. For example if an empty hostname is given, getaddrinfo resolves it to 2 addresses 0.0.0.0 and ::, in that order. We will thus bind to 0.0.0.0 first, and then fail to bind to :: on the same port. The same problem can happen if any other hostname lookup causes the IPv4 address to be reported before the IPv6 address. When we get an IPv6 bind failure, we should re-try the same port, but with IPV6_V6ONLY turned on again, to avoid clash with any IPv4 listener. This ensures that -vnc :1 will bind successfully to both 0.0.0.0 and ::, and also avoid -vnc :1,to=2 from mistakenly using a 2nd port for the :: listener. This is a regression due to commit 396f935 "ui: add ability to specify multiple VNC listen addresses". Acked-by: Gerd Hoffmann <kraxel@gmail.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-11util/qemu-sockets: Drop unused helper socket_address_to_string()Mao Zhongyi
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-07-04sockets: avoid formatting buffer that may not be NUL terminatedDaniel P. Berrange
The 'sun_path' field in the sockaddr_un struct is not required to be NUL termianted, so when reporting an error, we must use the separate 'path' variable which is guaranteed terminated. Fixes a bug spotted by coverity that was introduced in commit ad9579aaa16d5b385922d49edac2c96c79bcfb62 Author: Daniel P. Berrange <berrange@redhat.com> Date: Thu May 25 16:53:00 2017 +0100 sockets: improve error reporting if UNIX socket path is too long Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20170626103756.22974-1-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-07sockets: improve error reporting if UNIX socket path is too longDaniel P. Berrange
The 'struct sockaddr_un' only allows 108 bytes for the socket path. If the user supplies a path, QEMU uses snprintf() to silently truncate it when too long. This is undesirable because the user will then be unable to connect to the path they asked for. If the user doesn't supply a path, QEMU builds one based on TMPDIR, but if that leads to an overlong path, it mistakenly uses error_setg_errno() with a stale errno value, because snprintf() does not set errno on truncation. In solving this the code needed some refactoring to ensure we don't pass 'un.sun_path' directly to any APIs which expect NUL-terminated strings, because the path is not required to be terminated. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20170525155300.22743-1-berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-05-23sockets: Plug memory leak in socket_address_flatten()Markus Armbruster
socket_address_flatten() leaks a SocketAddress when its argument is null. Happens when opening a ChardevBackend of type 'udp' that is configured without a local address. Screwed up in commit bd269ebc due to last minute semantic conflict resolution. Spotted by Coverity. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1494866344-11013-1-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2017-05-09sockets: Delete unused helper socket_address_crumple()Markus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1493192202-3184-8-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> [Commit message typo fixed]
2017-05-09sockets: Limit SocketAddressLegacy to external interfacesMarkus Armbruster
SocketAddressLegacy is a simple union, and simple unions are awkward: they have their variant members wrapped in a "data" object on the wire, and require additional indirections in C. SocketAddress is the equivalent flat union. Convert all users of SocketAddressLegacy to SocketAddress, except for existing external interfaces. See also commit fce5d53..9445673 and 85a82e8..c5f1ae3. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1493192202-3184-7-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> [Minor editing accident fixed, commit message and a comment tweaked] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-05-09sockets: Rename SocketAddressFlat to SocketAddressMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1493192202-3184-6-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
2017-05-09sockets: Rename SocketAddress to SocketAddressLegacyMarkus Armbruster
The next commit will rename SocketAddressFlat to SocketAddress, and the commit after that will replace most uses of SocketAddressLegacy by SocketAddress, replacing most of this commit's renames right back. Note that checkpatch emits a few "line over 80 characters" warnings. The long lines are all temporary; the SocketAddressLegacy replacement will shorten them again. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1493192202-3184-5-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-05-09sockets: Prepare inet_parse() for flattened SocketAddressMarkus Armbruster
I'm going to flatten SocketAddress: rename SocketAddress to SocketAddressLegacy, SocketAddressFlat to SocketAddress, eliminate SocketAddressLegacy except in external interfaces. inet_parse() returns a newly allocated InetSocketAddress. Lift the allocation from inet_parse() into its caller socket_parse() to prepare for flattening SocketAddress. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1493192202-3184-3-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> [Straightforward rebase]
2017-05-09sockets: Prepare vsock_parse() for flattened SocketAddressMarkus Armbruster
I'm going to flatten SocketAddress: rename SocketAddress to SocketAddressLegacy, SocketAddressFlat to SocketAddress, eliminate SocketAddressLegacy except in external interfaces. vsock_parse() returns a newly allocated VsockSocketAddress. Lift the allocation from vsock_parse() into its caller socket_parse() to prepare for flattening SocketAddress. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1493192202-3184-2-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2017-04-24socket: Make errp the last parameter of vsock_connect_saddrFam Zheng
Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <20170421122710.15373-5-famz@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24socket: Make errp the last parameter of unix_connect_saddrFam Zheng
Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <20170421122710.15373-4-famz@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24socket: Make errp the last parameter of inet_connect_saddrFam Zheng
Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <20170421122710.15373-3-famz@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-24socket: Make errp the last parameter of socket_connectFam Zheng
Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <20170421122710.15373-2-famz@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-03sockets: New helper socket_address_crumple()Markus Armbruster
SocketAddress is a simple union, and simple unions are awkward: they have their variant members wrapped in a "data" object on the wire, and require additional indirections in C. I intend to limit its use to existing external interfaces. New ones should use SocketAddressFlat. I further intend to convert all internal interfaces to SocketAddressFlat. This helper should go away then. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-id: 1490895797-29094-8-git-send-email-armbru@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-03io vnc sockets: Clean up SocketAddressKind switchesMarkus Armbruster
We have quite a few switches over SocketAddressKind. Some have case labels for all enumeration values, others rely on a default label. Some abort when the value isn't a valid SocketAddressKind, others report an error then. Unify as follows. Always provide case labels for all enumeration values, to clarify intent. Abort when the value isn't a valid SocketAddressKind, because the program state is messed up then. Improve a few error messages while there. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 1490895797-29094-4-git-send-email-armbru@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-04-03nbd sockets vnc: Mark problematic address family tests TODOMarkus Armbruster
Certain features make sense only with certain address families. For instance, passing file descriptors requires AF_UNIX. Testing SocketAddress's saddr->type == SOCKET_ADDRESS_KIND_UNIX is obvious, but problematic: it can't recognize AF_UNIX when type == SOCKET_ADDRESS_KIND_FD. Mark such tests of saddr->type TODO. We may want to check the address family with getsockname() there. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1490895797-29094-2-git-send-email-armbru@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-03-28sockets: Fix socket_address_to_string() hostname truncationMarkus Armbruster
We first snprintf() to a fixed buffer, then g_strdup() the result *boggle*. Worse, the size of the fixed buffer INET6_ADDRSTRLEN + 5 + 4 is bogus: the 4 correctly accounts for '[', ']', ':' and '\0', but INET6_ADDRSTRLEN is not a suitable limit for inet->host, and 5 is not one for inet->port! They are for host and port in *numeric* form (exploiting that INET6_ADDRSTRLEN > INET_ADDRSTRLEN), but inet->host can also be a hostname, and inet->port can be a service name, to be resolved with getaddrinfo(). Fortunately, the only user so far is the "socket" network backend's net_socket_connected(), which uses it to initialize a NetSocketState's info_str[]. info_str[] has considerable more space: 256 instead of 55. So the bug's impact appears to be limited to truncated "info networks" with the "socket" network backend. The fix is obvious: use g_strdup_printf(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1490268208-23368-1-git-send-email-armbru@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-23io: introduce a DNS resolver APIDaniel P. Berrange
Currently DNS resolution is done automatically as part of the creation of a QIOChannelSocket object instance. This works ok for network clients where you just end up a single network socket, but for servers, the results of DNS resolution may require creation of multiple sockets. Introducing a DNS resolver API allows DNS resolution to be separated from the socket object creation. This will make it practical to create multiple QIOChannelSocket instances for servers. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-01-23sockets: add ability to disable DNS resolution for InetSocketAddressDaniel P. Berrange
Add a 'numeric' flag to the InetSocketAddress struct to allow the caller to indicate that DNS should be skipped for the host/port fields. This is useful if the caller knows the address is already numeric and wants to guarantee no (potentially blocking) DNS lookups are attempted. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-10-31sockets: add AF_VSOCK supportStefan Hajnoczi
Add the AF_VSOCK address family so that qemu-ga will be able to use virtio-vsock. The AF_VSOCK address family uses <cid, port> address tuples. The cid is the unique identifier comparable to an IP address. AF_VSOCK does not use name resolution so it's easy to convert between struct sockaddr_vm and strings. This patch defines a VsockSocketAddress instead of trying to piggy-back on InetSocketAddress. This is cleaner in the long run since it avoids lots of IPv4 vs IPv6 vs vsock special casing. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> * treat trailing commas as garbage when parsing (Eric Blake) * add configure check instead of checking AF_VSOCK directly Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
2016-10-31util/qemu-sockets: Make inet_connect_saddr() publicAshijeet Acharya
Make inet_connect_saddr() in util/qemu-sockets.c public in order to be able to use it with InetSocketAddress sockets outside of util/qemu-sockets.c independently. Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-10-25qapi: rename *qmp-*-visitor* to *qobject-*-visitor*Daniel P. Berrange
The QMP visitors have no direct dependency on QMP. It is valid to use them anywhere that one has a QObject. Rename them to better reflect their functionality as a generic QObject to QAPI converter. This is the first of three parts: rename the files. The next two parts will rename C identifiers. The split is necessary to make git rename detection work. Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Split into file and identifier rename, two comments touched up] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-09-13util: fix some coding style issueCao jin
Fix some coding style issues found in removing NonBlockingConnectHandler. Cc: Daniel P. Berrange <berrange@redhat.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Reviwed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Message-Id: <1469696074-12744-3-git-send-email-caoj.fnst@cn.fujitsu.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-13util/qemu-sockets: revert Yoda Conditions to normalCao jin
Follow CODING_STYLE Cc: Daniel P. Berrange <berrange@redhat.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com> Message-Id: <1469703004-14800-1-git-send-email-caoj.fnst@cn.fujitsu.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>