cur_mon really needs to be coroutine-local as soon as we move monitor command handlers to coroutines and let them yield. As a first step, just remove all direct accesses to cur_mon so that we can implement this in the getter function later. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20201005155855.256490-4-kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
1390 lines
36 KiB
C
1390 lines
36 KiB
C
/*
|
|
* inet and unix socket functions for qemu
|
|
*
|
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* (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
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*
|
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; under version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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|
|
|
#ifdef CONFIG_AF_VSOCK
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#include <linux/vm_sockets.h>
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#endif /* CONFIG_AF_VSOCK */
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|
|
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#include "qemu-common.h"
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|
#include "monitor/monitor.h"
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#include "qapi/clone-visitor.h"
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#include "qapi/error.h"
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#include "qapi/qapi-visit-sockets.h"
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#include "qemu/sockets.h"
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#include "qemu/main-loop.h"
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#include "qapi/qobject-input-visitor.h"
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|
#include "qapi/qobject-output-visitor.h"
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#include "qemu/cutils.h"
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#include "trace.h"
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|
|
|
#ifndef AI_ADDRCONFIG
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|
# define AI_ADDRCONFIG 0
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|
#endif
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|
|
#ifndef AI_V4MAPPED
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# define AI_V4MAPPED 0
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#endif
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|
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#ifndef AI_NUMERICSERV
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# define AI_NUMERICSERV 0
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|
#endif
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|
|
|
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static int inet_getport(struct addrinfo *e)
|
|
{
|
|
struct sockaddr_in *i4;
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struct sockaddr_in6 *i6;
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|
|
|
switch (e->ai_family) {
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|
case PF_INET6:
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|
i6 = (void*)e->ai_addr;
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|
return ntohs(i6->sin6_port);
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|
case PF_INET:
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|
i4 = (void*)e->ai_addr;
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return ntohs(i4->sin_port);
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default:
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|
return 0;
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}
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}
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|
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static void inet_setport(struct addrinfo *e, int port)
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|
{
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struct sockaddr_in *i4;
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struct sockaddr_in6 *i6;
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|
|
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switch (e->ai_family) {
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case PF_INET6:
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i6 = (void*)e->ai_addr;
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i6->sin6_port = htons(port);
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break;
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case PF_INET:
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i4 = (void*)e->ai_addr;
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i4->sin_port = htons(port);
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break;
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}
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}
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|
|
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NetworkAddressFamily inet_netfamily(int family)
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{
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switch (family) {
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case PF_INET6: return NETWORK_ADDRESS_FAMILY_IPV6;
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case PF_INET: return NETWORK_ADDRESS_FAMILY_IPV4;
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case PF_UNIX: return NETWORK_ADDRESS_FAMILY_UNIX;
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#ifdef CONFIG_AF_VSOCK
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case PF_VSOCK: return NETWORK_ADDRESS_FAMILY_VSOCK;
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#endif /* CONFIG_AF_VSOCK */
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}
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return NETWORK_ADDRESS_FAMILY_UNKNOWN;
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}
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bool fd_is_socket(int fd)
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|
{
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int optval;
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socklen_t optlen = sizeof(optval);
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return !qemu_getsockopt(fd, SOL_SOCKET, SO_TYPE, &optval, &optlen);
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}
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/*
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* Matrix we're trying to apply
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*
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* ipv4 ipv6 family
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* - - PF_UNSPEC
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* - f PF_INET
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* - t PF_INET6
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* f - PF_INET6
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* f f <error>
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* f t PF_INET6
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* t - PF_INET
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* t f PF_INET
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* t t PF_INET6/PF_UNSPEC
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*
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* NB, this matrix is only about getting the necessary results
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* from getaddrinfo(). Some of the cases require further work
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* after reading results from getaddrinfo in order to fully
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* apply the logic the end user wants.
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*
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* In the first and last cases, we must set IPV6_V6ONLY=0
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* when binding, to allow a single listener to potentially
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* accept both IPv4+6 addresses.
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|
*/
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int inet_ai_family_from_address(InetSocketAddress *addr,
|
|
Error **errp)
|
|
{
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if (addr->has_ipv6 && addr->has_ipv4 &&
|
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!addr->ipv6 && !addr->ipv4) {
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error_setg(errp, "Cannot disable IPv4 and IPv6 at same time");
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return PF_UNSPEC;
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}
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if ((addr->has_ipv6 && addr->ipv6) && (addr->has_ipv4 && addr->ipv4)) {
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/*
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* Some backends can only do a single listener. In that case
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* we want empty hostname to resolve to "::" and then use the
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* flag IPV6_V6ONLY==0 to get both protocols on 1 socket. This
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* doesn't work for addresses other than "", so they're just
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* inevitably broken until multiple listeners can be used,
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* and thus we honour getaddrinfo automatic protocol detection
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* Once all backends do multi-listener, remove the PF_INET6
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* branch entirely.
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*/
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if (!addr->host || g_str_equal(addr->host, "")) {
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return PF_INET6;
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} else {
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return PF_UNSPEC;
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}
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}
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if ((addr->has_ipv6 && addr->ipv6) || (addr->has_ipv4 && !addr->ipv4)) {
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return PF_INET6;
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}
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if ((addr->has_ipv4 && addr->ipv4) || (addr->has_ipv6 && !addr->ipv6)) {
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return PF_INET;
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}
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return PF_UNSPEC;
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}
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static int create_fast_reuse_socket(struct addrinfo *e)
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{
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int slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
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if (slisten < 0) {
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return -1;
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}
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socket_set_fast_reuse(slisten);
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return slisten;
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}
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static int try_bind(int socket, InetSocketAddress *saddr, struct addrinfo *e)
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{
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#ifndef IPV6_V6ONLY
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return bind(socket, e->ai_addr, e->ai_addrlen);
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#else
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/*
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* Deals with first & last cases in matrix in comment
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* for inet_ai_family_from_address().
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*/
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int v6only =
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((!saddr->has_ipv4 && !saddr->has_ipv6) ||
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(saddr->has_ipv4 && saddr->ipv4 &&
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saddr->has_ipv6 && saddr->ipv6)) ? 0 : 1;
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int stat;
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rebind:
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if (e->ai_family == PF_INET6) {
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qemu_setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, &v6only,
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sizeof(v6only));
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}
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stat = bind(socket, e->ai_addr, e->ai_addrlen);
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if (!stat) {
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return 0;
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}
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/* If we got EADDRINUSE from an IPv6 bind & v6only is unset,
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* it could be that the IPv4 port is already claimed, so retry
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* with v6only set
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*/
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if (e->ai_family == PF_INET6 && errno == EADDRINUSE && !v6only) {
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v6only = 1;
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goto rebind;
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}
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return stat;
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#endif
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}
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static int inet_listen_saddr(InetSocketAddress *saddr,
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int port_offset,
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int num,
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Error **errp)
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{
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struct addrinfo ai,*res,*e;
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char port[33];
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char uaddr[INET6_ADDRSTRLEN+1];
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char uport[33];
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int rc, port_min, port_max, p;
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int slisten = -1;
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int saved_errno = 0;
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bool socket_created = false;
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Error *err = NULL;
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if (saddr->keep_alive) {
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error_setg(errp, "keep-alive option is not supported for passive "
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"sockets");
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return -1;
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}
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memset(&ai,0, sizeof(ai));
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ai.ai_flags = AI_PASSIVE;
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if (saddr->has_numeric && saddr->numeric) {
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ai.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV;
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}
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ai.ai_family = inet_ai_family_from_address(saddr, &err);
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ai.ai_socktype = SOCK_STREAM;
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if (err) {
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error_propagate(errp, err);
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return -1;
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}
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if (saddr->host == NULL) {
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error_setg(errp, "host not specified");
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return -1;
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}
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if (saddr->port != NULL) {
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pstrcpy(port, sizeof(port), saddr->port);
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} else {
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port[0] = '\0';
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}
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/* lookup */
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if (port_offset) {
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|
unsigned long long baseport;
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if (strlen(port) == 0) {
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error_setg(errp, "port not specified");
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return -1;
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|
}
|
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if (parse_uint_full(port, &baseport, 10) < 0) {
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error_setg(errp, "can't convert to a number: %s", port);
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|
return -1;
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}
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if (baseport > 65535 ||
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baseport + port_offset > 65535) {
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|
error_setg(errp, "port %s out of range", port);
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|
return -1;
|
|
}
|
|
snprintf(port, sizeof(port), "%d", (int)baseport + port_offset);
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|
}
|
|
rc = getaddrinfo(strlen(saddr->host) ? saddr->host : NULL,
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strlen(port) ? port : NULL, &ai, &res);
|
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if (rc != 0) {
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error_setg(errp, "address resolution failed for %s:%s: %s",
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saddr->host, port, gai_strerror(rc));
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return -1;
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}
|
|
|
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/* create socket + bind/listen */
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for (e = res; e != NULL; e = e->ai_next) {
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getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
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uaddr,INET6_ADDRSTRLEN,uport,32,
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NI_NUMERICHOST | NI_NUMERICSERV);
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|
|
|
port_min = inet_getport(e);
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port_max = saddr->has_to ? saddr->to + port_offset : port_min;
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|
for (p = port_min; p <= port_max; p++) {
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inet_setport(e, p);
|
|
|
|
slisten = create_fast_reuse_socket(e);
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if (slisten < 0) {
|
|
/* First time we expect we might fail to create the socket
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|
* eg if 'e' has AF_INET6 but ipv6 kmod is not loaded.
|
|
* Later iterations should always succeed if first iteration
|
|
* worked though, so treat that as fatal.
|
|
*/
|
|
if (p == port_min) {
|
|
continue;
|
|
} else {
|
|
error_setg_errno(errp, errno,
|
|
"Failed to recreate failed listening socket");
|
|
goto listen_failed;
|
|
}
|
|
}
|
|
socket_created = true;
|
|
|
|
rc = try_bind(slisten, saddr, e);
|
|
if (rc < 0) {
|
|
if (errno != EADDRINUSE) {
|
|
error_setg_errno(errp, errno, "Failed to bind socket");
|
|
goto listen_failed;
|
|
}
|
|
} else {
|
|
if (!listen(slisten, num)) {
|
|
goto listen_ok;
|
|
}
|
|
if (errno != EADDRINUSE) {
|
|
error_setg_errno(errp, errno, "Failed to listen on socket");
|
|
goto listen_failed;
|
|
}
|
|
}
|
|
/* Someone else managed to bind to the same port and beat us
|
|
* to listen on it! Socket semantics does not allow us to
|
|
* recover from this situation, so we need to recreate the
|
|
* socket to allow bind attempts for subsequent ports:
|
|
*/
|
|
closesocket(slisten);
|
|
slisten = -1;
|
|
}
|
|
}
|
|
error_setg_errno(errp, errno,
|
|
socket_created ?
|
|
"Failed to find an available port" :
|
|
"Failed to create a socket");
|
|
listen_failed:
|
|
saved_errno = errno;
|
|
if (slisten >= 0) {
|
|
closesocket(slisten);
|
|
}
|
|
freeaddrinfo(res);
|
|
errno = saved_errno;
|
|
return -1;
|
|
|
|
listen_ok:
|
|
freeaddrinfo(res);
|
|
return slisten;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
#define QEMU_SOCKET_RC_INPROGRESS(rc) \
|
|
((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY)
|
|
#else
|
|
#define QEMU_SOCKET_RC_INPROGRESS(rc) \
|
|
((rc) == -EINPROGRESS)
|
|
#endif
|
|
|
|
static int inet_connect_addr(struct addrinfo *addr, Error **errp);
|
|
|
|
static int inet_connect_addr(struct addrinfo *addr, Error **errp)
|
|
{
|
|
int sock, rc;
|
|
|
|
sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
return -1;
|
|
}
|
|
socket_set_fast_reuse(sock);
|
|
|
|
/* connect to peer */
|
|
do {
|
|
rc = 0;
|
|
if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
|
|
rc = -errno;
|
|
}
|
|
} while (rc == -EINTR);
|
|
|
|
if (rc < 0) {
|
|
error_setg_errno(errp, errno, "Failed to connect socket");
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
|
|
|
return sock;
|
|
}
|
|
|
|
static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr,
|
|
Error **errp)
|
|
{
|
|
struct addrinfo ai, *res;
|
|
int rc;
|
|
Error *err = NULL;
|
|
static int useV4Mapped = 1;
|
|
|
|
memset(&ai, 0, sizeof(ai));
|
|
|
|
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
|
|
if (qatomic_read(&useV4Mapped)) {
|
|
ai.ai_flags |= AI_V4MAPPED;
|
|
}
|
|
ai.ai_family = inet_ai_family_from_address(saddr, &err);
|
|
ai.ai_socktype = SOCK_STREAM;
|
|
|
|
if (err) {
|
|
error_propagate(errp, err);
|
|
return NULL;
|
|
}
|
|
|
|
if (saddr->host == NULL || saddr->port == NULL) {
|
|
error_setg(errp, "host and/or port not specified");
|
|
return NULL;
|
|
}
|
|
|
|
/* lookup */
|
|
rc = getaddrinfo(saddr->host, saddr->port, &ai, &res);
|
|
|
|
/* At least FreeBSD and OS-X 10.6 declare AI_V4MAPPED but
|
|
* then don't implement it in their getaddrinfo(). Detect
|
|
* this and retry without the flag since that's preferable
|
|
* to a fatal error
|
|
*/
|
|
if (rc == EAI_BADFLAGS &&
|
|
(ai.ai_flags & AI_V4MAPPED)) {
|
|
qatomic_set(&useV4Mapped, 0);
|
|
ai.ai_flags &= ~AI_V4MAPPED;
|
|
rc = getaddrinfo(saddr->host, saddr->port, &ai, &res);
|
|
}
|
|
if (rc != 0) {
|
|
error_setg(errp, "address resolution failed for %s:%s: %s",
|
|
saddr->host, saddr->port, gai_strerror(rc));
|
|
return NULL;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Create a socket and connect it to an address.
|
|
*
|
|
* @saddr: Inet socket address specification
|
|
* @errp: set on error
|
|
*
|
|
* Returns: -1 on error, file descriptor on success.
|
|
*/
|
|
int inet_connect_saddr(InetSocketAddress *saddr, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
struct addrinfo *res, *e;
|
|
int sock = -1;
|
|
|
|
res = inet_parse_connect_saddr(saddr, errp);
|
|
if (!res) {
|
|
return -1;
|
|
}
|
|
|
|
for (e = res; e != NULL; e = e->ai_next) {
|
|
error_free(local_err);
|
|
local_err = NULL;
|
|
sock = inet_connect_addr(e, &local_err);
|
|
if (sock >= 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
freeaddrinfo(res);
|
|
|
|
if (sock < 0) {
|
|
error_propagate(errp, local_err);
|
|
return sock;
|
|
}
|
|
|
|
if (saddr->keep_alive) {
|
|
int val = 1;
|
|
int ret = qemu_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
|
|
&val, sizeof(val));
|
|
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, errno, "Unable to set KEEPALIVE");
|
|
close(sock);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return sock;
|
|
}
|
|
|
|
static int inet_dgram_saddr(InetSocketAddress *sraddr,
|
|
InetSocketAddress *sladdr,
|
|
Error **errp)
|
|
{
|
|
struct addrinfo ai, *peer = NULL, *local = NULL;
|
|
const char *addr;
|
|
const char *port;
|
|
int sock = -1, rc;
|
|
Error *err = NULL;
|
|
|
|
/* lookup peer addr */
|
|
memset(&ai,0, sizeof(ai));
|
|
ai.ai_flags = AI_CANONNAME | AI_V4MAPPED | AI_ADDRCONFIG;
|
|
ai.ai_family = inet_ai_family_from_address(sraddr, &err);
|
|
ai.ai_socktype = SOCK_DGRAM;
|
|
|
|
if (err) {
|
|
error_propagate(errp, err);
|
|
goto err;
|
|
}
|
|
|
|
addr = sraddr->host;
|
|
port = sraddr->port;
|
|
if (addr == NULL || strlen(addr) == 0) {
|
|
addr = "localhost";
|
|
}
|
|
if (port == NULL || strlen(port) == 0) {
|
|
error_setg(errp, "remote port not specified");
|
|
goto err;
|
|
}
|
|
|
|
if ((rc = getaddrinfo(addr, port, &ai, &peer)) != 0) {
|
|
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
|
gai_strerror(rc));
|
|
goto err;
|
|
}
|
|
|
|
/* lookup local addr */
|
|
memset(&ai,0, sizeof(ai));
|
|
ai.ai_flags = AI_PASSIVE;
|
|
ai.ai_family = peer->ai_family;
|
|
ai.ai_socktype = SOCK_DGRAM;
|
|
|
|
if (sladdr) {
|
|
addr = sladdr->host;
|
|
port = sladdr->port;
|
|
if (addr == NULL || strlen(addr) == 0) {
|
|
addr = NULL;
|
|
}
|
|
if (!port || strlen(port) == 0) {
|
|
port = "0";
|
|
}
|
|
} else {
|
|
addr = NULL;
|
|
port = "0";
|
|
}
|
|
|
|
if ((rc = getaddrinfo(addr, port, &ai, &local)) != 0) {
|
|
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
|
gai_strerror(rc));
|
|
goto err;
|
|
}
|
|
|
|
/* create socket */
|
|
sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
goto err;
|
|
}
|
|
socket_set_fast_reuse(sock);
|
|
|
|
/* bind socket */
|
|
if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to bind socket");
|
|
goto err;
|
|
}
|
|
|
|
/* connect to peer */
|
|
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to connect socket");
|
|
goto err;
|
|
}
|
|
|
|
freeaddrinfo(local);
|
|
freeaddrinfo(peer);
|
|
return sock;
|
|
|
|
err:
|
|
if (sock != -1) {
|
|
closesocket(sock);
|
|
}
|
|
if (local) {
|
|
freeaddrinfo(local);
|
|
}
|
|
if (peer) {
|
|
freeaddrinfo(peer);
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* compatibility wrapper */
|
|
static int inet_parse_flag(const char *flagname, const char *optstr, bool *val,
|
|
Error **errp)
|
|
{
|
|
char *end;
|
|
size_t len;
|
|
|
|
end = strstr(optstr, ",");
|
|
if (end) {
|
|
if (end[1] == ',') { /* Reject 'ipv6=on,,foo' */
|
|
error_setg(errp, "error parsing '%s' flag '%s'", flagname, optstr);
|
|
return -1;
|
|
}
|
|
len = end - optstr;
|
|
} else {
|
|
len = strlen(optstr);
|
|
}
|
|
if (len == 0 || (len == 3 && strncmp(optstr, "=on", len) == 0)) {
|
|
*val = true;
|
|
} else if (len == 4 && strncmp(optstr, "=off", len) == 0) {
|
|
*val = false;
|
|
} else {
|
|
error_setg(errp, "error parsing '%s' flag '%s'", flagname, optstr);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int inet_parse(InetSocketAddress *addr, const char *str, Error **errp)
|
|
{
|
|
const char *optstr, *h;
|
|
char host[65];
|
|
char port[33];
|
|
int to;
|
|
int pos;
|
|
char *begin;
|
|
|
|
memset(addr, 0, sizeof(*addr));
|
|
|
|
/* parse address */
|
|
if (str[0] == ':') {
|
|
/* no host given */
|
|
host[0] = '\0';
|
|
if (sscanf(str, ":%32[^,]%n", port, &pos) != 1) {
|
|
error_setg(errp, "error parsing port in address '%s'", str);
|
|
return -1;
|
|
}
|
|
} else if (str[0] == '[') {
|
|
/* IPv6 addr */
|
|
if (sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos) != 2) {
|
|
error_setg(errp, "error parsing IPv6 address '%s'", str);
|
|
return -1;
|
|
}
|
|
} else {
|
|
/* hostname or IPv4 addr */
|
|
if (sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos) != 2) {
|
|
error_setg(errp, "error parsing address '%s'", str);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
addr->host = g_strdup(host);
|
|
addr->port = g_strdup(port);
|
|
|
|
/* parse options */
|
|
optstr = str + pos;
|
|
h = strstr(optstr, ",to=");
|
|
if (h) {
|
|
h += 4;
|
|
if (sscanf(h, "%d%n", &to, &pos) != 1 ||
|
|
(h[pos] != '\0' && h[pos] != ',')) {
|
|
error_setg(errp, "error parsing to= argument");
|
|
return -1;
|
|
}
|
|
addr->has_to = true;
|
|
addr->to = to;
|
|
}
|
|
begin = strstr(optstr, ",ipv4");
|
|
if (begin) {
|
|
if (inet_parse_flag("ipv4", begin + 5, &addr->ipv4, errp) < 0) {
|
|
return -1;
|
|
}
|
|
addr->has_ipv4 = true;
|
|
}
|
|
begin = strstr(optstr, ",ipv6");
|
|
if (begin) {
|
|
if (inet_parse_flag("ipv6", begin + 5, &addr->ipv6, errp) < 0) {
|
|
return -1;
|
|
}
|
|
addr->has_ipv6 = true;
|
|
}
|
|
begin = strstr(optstr, ",keep-alive");
|
|
if (begin) {
|
|
if (inet_parse_flag("keep-alive", begin + strlen(",keep-alive"),
|
|
&addr->keep_alive, errp) < 0)
|
|
{
|
|
return -1;
|
|
}
|
|
addr->has_keep_alive = true;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a blocking socket and connect it to an address.
|
|
*
|
|
* @str: address string
|
|
* @errp: set in case of an error
|
|
*
|
|
* Returns -1 in case of error, file descriptor on success
|
|
**/
|
|
int inet_connect(const char *str, Error **errp)
|
|
{
|
|
int sock = -1;
|
|
InetSocketAddress *addr = g_new(InetSocketAddress, 1);
|
|
|
|
if (!inet_parse(addr, str, errp)) {
|
|
sock = inet_connect_saddr(addr, errp);
|
|
}
|
|
qapi_free_InetSocketAddress(addr);
|
|
return sock;
|
|
}
|
|
|
|
#ifdef CONFIG_AF_VSOCK
|
|
static bool vsock_parse_vaddr_to_sockaddr(const VsockSocketAddress *vaddr,
|
|
struct sockaddr_vm *svm,
|
|
Error **errp)
|
|
{
|
|
unsigned long long val;
|
|
|
|
memset(svm, 0, sizeof(*svm));
|
|
svm->svm_family = AF_VSOCK;
|
|
|
|
if (parse_uint_full(vaddr->cid, &val, 10) < 0 ||
|
|
val > UINT32_MAX) {
|
|
error_setg(errp, "Failed to parse cid '%s'", vaddr->cid);
|
|
return false;
|
|
}
|
|
svm->svm_cid = val;
|
|
|
|
if (parse_uint_full(vaddr->port, &val, 10) < 0 ||
|
|
val > UINT32_MAX) {
|
|
error_setg(errp, "Failed to parse port '%s'", vaddr->port);
|
|
return false;
|
|
}
|
|
svm->svm_port = val;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int vsock_connect_addr(const struct sockaddr_vm *svm, Error **errp)
|
|
{
|
|
int sock, rc;
|
|
|
|
sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
return -1;
|
|
}
|
|
|
|
/* connect to peer */
|
|
do {
|
|
rc = 0;
|
|
if (connect(sock, (const struct sockaddr *)svm, sizeof(*svm)) < 0) {
|
|
rc = -errno;
|
|
}
|
|
} while (rc == -EINTR);
|
|
|
|
if (rc < 0) {
|
|
error_setg_errno(errp, errno, "Failed to connect socket");
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
|
|
|
return sock;
|
|
}
|
|
|
|
static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
|
|
{
|
|
struct sockaddr_vm svm;
|
|
|
|
if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
|
|
return -1;
|
|
}
|
|
|
|
return vsock_connect_addr(&svm, errp);
|
|
}
|
|
|
|
static int vsock_listen_saddr(VsockSocketAddress *vaddr,
|
|
int num,
|
|
Error **errp)
|
|
{
|
|
struct sockaddr_vm svm;
|
|
int slisten;
|
|
|
|
if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
|
|
return -1;
|
|
}
|
|
|
|
slisten = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
|
|
if (slisten < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
return -1;
|
|
}
|
|
|
|
if (bind(slisten, (const struct sockaddr *)&svm, sizeof(svm)) != 0) {
|
|
error_setg_errno(errp, errno, "Failed to bind socket");
|
|
closesocket(slisten);
|
|
return -1;
|
|
}
|
|
|
|
if (listen(slisten, num) != 0) {
|
|
error_setg_errno(errp, errno, "Failed to listen on socket");
|
|
closesocket(slisten);
|
|
return -1;
|
|
}
|
|
return slisten;
|
|
}
|
|
|
|
static int vsock_parse(VsockSocketAddress *addr, const char *str,
|
|
Error **errp)
|
|
{
|
|
char cid[33];
|
|
char port[33];
|
|
int n;
|
|
|
|
if (sscanf(str, "%32[^:]:%32[^,]%n", cid, port, &n) != 2) {
|
|
error_setg(errp, "error parsing address '%s'", str);
|
|
return -1;
|
|
}
|
|
if (str[n] != '\0') {
|
|
error_setg(errp, "trailing characters in address '%s'", str);
|
|
return -1;
|
|
}
|
|
|
|
addr->cid = g_strdup(cid);
|
|
addr->port = g_strdup(port);
|
|
return 0;
|
|
}
|
|
#else
|
|
static void vsock_unsupported(Error **errp)
|
|
{
|
|
error_setg(errp, "socket family AF_VSOCK unsupported");
|
|
}
|
|
|
|
static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp)
|
|
{
|
|
vsock_unsupported(errp);
|
|
return -1;
|
|
}
|
|
|
|
static int vsock_listen_saddr(VsockSocketAddress *vaddr,
|
|
int num,
|
|
Error **errp)
|
|
{
|
|
vsock_unsupported(errp);
|
|
return -1;
|
|
}
|
|
|
|
static int vsock_parse(VsockSocketAddress *addr, const char *str,
|
|
Error **errp)
|
|
{
|
|
vsock_unsupported(errp);
|
|
return -1;
|
|
}
|
|
#endif /* CONFIG_AF_VSOCK */
|
|
|
|
#ifndef _WIN32
|
|
|
|
static int unix_listen_saddr(UnixSocketAddress *saddr,
|
|
int num,
|
|
Error **errp)
|
|
{
|
|
struct sockaddr_un un;
|
|
int sock, fd;
|
|
char *pathbuf = NULL;
|
|
const char *path;
|
|
size_t pathlen;
|
|
size_t addrlen;
|
|
|
|
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create Unix socket");
|
|
return -1;
|
|
}
|
|
|
|
if (saddr->path && saddr->path[0]) {
|
|
path = saddr->path;
|
|
} else {
|
|
const char *tmpdir = getenv("TMPDIR");
|
|
tmpdir = tmpdir ? tmpdir : "/tmp";
|
|
path = pathbuf = g_strdup_printf("%s/qemu-socket-XXXXXX", tmpdir);
|
|
}
|
|
|
|
pathlen = strlen(path);
|
|
if (pathlen > sizeof(un.sun_path) ||
|
|
(saddr->abstract && pathlen > (sizeof(un.sun_path) - 1))) {
|
|
error_setg(errp, "UNIX socket path '%s' is too long", path);
|
|
error_append_hint(errp, "Path must be less than %zu bytes\n",
|
|
saddr->abstract ? sizeof(un.sun_path) - 1 :
|
|
sizeof(un.sun_path));
|
|
goto err;
|
|
}
|
|
|
|
if (pathbuf != NULL) {
|
|
/*
|
|
* This dummy fd usage silences the mktemp() unsecure warning.
|
|
* Using mkstemp() doesn't make things more secure here
|
|
* though. bind() complains about existing files, so we have
|
|
* to unlink first and thus re-open the race window. The
|
|
* worst case possible is bind() failing, i.e. a DoS attack.
|
|
*/
|
|
fd = mkstemp(pathbuf);
|
|
if (fd < 0) {
|
|
error_setg_errno(errp, errno,
|
|
"Failed to make a temporary socket %s", pathbuf);
|
|
goto err;
|
|
}
|
|
close(fd);
|
|
}
|
|
|
|
if (!saddr->abstract && unlink(path) < 0 && errno != ENOENT) {
|
|
error_setg_errno(errp, errno,
|
|
"Failed to unlink socket %s", path);
|
|
goto err;
|
|
}
|
|
|
|
memset(&un, 0, sizeof(un));
|
|
un.sun_family = AF_UNIX;
|
|
addrlen = sizeof(un);
|
|
|
|
if (saddr->abstract) {
|
|
un.sun_path[0] = '\0';
|
|
memcpy(&un.sun_path[1], path, pathlen);
|
|
if (saddr->tight) {
|
|
addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen;
|
|
}
|
|
} else {
|
|
memcpy(un.sun_path, path, pathlen);
|
|
}
|
|
|
|
if (bind(sock, (struct sockaddr *) &un, addrlen) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to bind socket to %s", path);
|
|
goto err;
|
|
}
|
|
if (listen(sock, num) < 0) {
|
|
error_setg_errno(errp, errno, "Failed to listen on socket");
|
|
goto err;
|
|
}
|
|
|
|
g_free(pathbuf);
|
|
return sock;
|
|
|
|
err:
|
|
g_free(pathbuf);
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
|
|
|
static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
|
|
{
|
|
struct sockaddr_un un;
|
|
int sock, rc;
|
|
size_t pathlen;
|
|
size_t addrlen;
|
|
|
|
if (saddr->path == NULL) {
|
|
error_setg(errp, "unix connect: no path specified");
|
|
return -1;
|
|
}
|
|
|
|
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
|
if (sock < 0) {
|
|
error_setg_errno(errp, errno, "Failed to create socket");
|
|
return -1;
|
|
}
|
|
|
|
pathlen = strlen(saddr->path);
|
|
if (pathlen > sizeof(un.sun_path) ||
|
|
(saddr->abstract && pathlen > (sizeof(un.sun_path) - 1))) {
|
|
error_setg(errp, "UNIX socket path '%s' is too long", saddr->path);
|
|
error_append_hint(errp, "Path must be less than %zu bytes\n",
|
|
saddr->abstract ? sizeof(un.sun_path) - 1 :
|
|
sizeof(un.sun_path));
|
|
goto err;
|
|
}
|
|
|
|
memset(&un, 0, sizeof(un));
|
|
un.sun_family = AF_UNIX;
|
|
addrlen = sizeof(un);
|
|
|
|
if (saddr->abstract) {
|
|
un.sun_path[0] = '\0';
|
|
memcpy(&un.sun_path[1], saddr->path, pathlen);
|
|
if (saddr->tight) {
|
|
addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen;
|
|
}
|
|
} else {
|
|
memcpy(un.sun_path, saddr->path, pathlen);
|
|
}
|
|
/* connect to peer */
|
|
do {
|
|
rc = 0;
|
|
if (connect(sock, (struct sockaddr *) &un, addrlen) < 0) {
|
|
rc = -errno;
|
|
}
|
|
} while (rc == -EINTR);
|
|
|
|
if (rc < 0) {
|
|
error_setg_errno(errp, -rc, "Failed to connect socket %s",
|
|
saddr->path);
|
|
goto err;
|
|
}
|
|
|
|
return sock;
|
|
|
|
err:
|
|
close(sock);
|
|
return -1;
|
|
}
|
|
|
|
#else
|
|
|
|
static int unix_listen_saddr(UnixSocketAddress *saddr,
|
|
int num,
|
|
Error **errp)
|
|
{
|
|
error_setg(errp, "unix sockets are not available on windows");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
|
|
static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
|
|
{
|
|
error_setg(errp, "unix sockets are not available on windows");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
/* compatibility wrapper */
|
|
int unix_listen(const char *str, Error **errp)
|
|
{
|
|
UnixSocketAddress *saddr;
|
|
int sock;
|
|
|
|
saddr = g_new0(UnixSocketAddress, 1);
|
|
saddr->path = g_strdup(str);
|
|
sock = unix_listen_saddr(saddr, 1, errp);
|
|
qapi_free_UnixSocketAddress(saddr);
|
|
return sock;
|
|
}
|
|
|
|
int unix_connect(const char *path, Error **errp)
|
|
{
|
|
UnixSocketAddress *saddr;
|
|
int sock;
|
|
|
|
saddr = g_new0(UnixSocketAddress, 1);
|
|
saddr->path = g_strdup(path);
|
|
sock = unix_connect_saddr(saddr, errp);
|
|
qapi_free_UnixSocketAddress(saddr);
|
|
return sock;
|
|
}
|
|
|
|
|
|
SocketAddress *socket_parse(const char *str, Error **errp)
|
|
{
|
|
SocketAddress *addr;
|
|
|
|
addr = g_new0(SocketAddress, 1);
|
|
if (strstart(str, "unix:", NULL)) {
|
|
if (str[5] == '\0') {
|
|
error_setg(errp, "invalid Unix socket address");
|
|
goto fail;
|
|
} else {
|
|
addr->type = SOCKET_ADDRESS_TYPE_UNIX;
|
|
addr->u.q_unix.path = g_strdup(str + 5);
|
|
}
|
|
} else if (strstart(str, "fd:", NULL)) {
|
|
if (str[3] == '\0') {
|
|
error_setg(errp, "invalid file descriptor address");
|
|
goto fail;
|
|
} else {
|
|
addr->type = SOCKET_ADDRESS_TYPE_FD;
|
|
addr->u.fd.str = g_strdup(str + 3);
|
|
}
|
|
} else if (strstart(str, "vsock:", NULL)) {
|
|
addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
|
|
if (vsock_parse(&addr->u.vsock, str + strlen("vsock:"), errp)) {
|
|
goto fail;
|
|
}
|
|
} else {
|
|
addr->type = SOCKET_ADDRESS_TYPE_INET;
|
|
if (inet_parse(&addr->u.inet, str, errp)) {
|
|
goto fail;
|
|
}
|
|
}
|
|
return addr;
|
|
|
|
fail:
|
|
qapi_free_SocketAddress(addr);
|
|
return NULL;
|
|
}
|
|
|
|
static int socket_get_fd(const char *fdstr, int num, Error **errp)
|
|
{
|
|
Monitor *cur_mon = monitor_cur();
|
|
int fd;
|
|
if (num != 1) {
|
|
error_setg_errno(errp, EINVAL, "socket_get_fd: too many connections");
|
|
return -1;
|
|
}
|
|
if (cur_mon) {
|
|
fd = monitor_get_fd(cur_mon, fdstr, errp);
|
|
if (fd < 0) {
|
|
return -1;
|
|
}
|
|
} else {
|
|
if (qemu_strtoi(fdstr, NULL, 10, &fd) < 0) {
|
|
error_setg_errno(errp, errno,
|
|
"Unable to parse FD number %s",
|
|
fdstr);
|
|
return -1;
|
|
}
|
|
}
|
|
if (!fd_is_socket(fd)) {
|
|
error_setg(errp, "File descriptor '%s' is not a socket", fdstr);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
int socket_connect(SocketAddress *addr, Error **errp)
|
|
{
|
|
int fd;
|
|
|
|
switch (addr->type) {
|
|
case SOCKET_ADDRESS_TYPE_INET:
|
|
fd = inet_connect_saddr(&addr->u.inet, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_TYPE_UNIX:
|
|
fd = unix_connect_saddr(&addr->u.q_unix, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_TYPE_FD:
|
|
fd = socket_get_fd(addr->u.fd.str, 1, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_TYPE_VSOCK:
|
|
fd = vsock_connect_saddr(&addr->u.vsock, errp);
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
int socket_listen(SocketAddress *addr, int num, Error **errp)
|
|
{
|
|
int fd;
|
|
|
|
trace_socket_listen(num);
|
|
switch (addr->type) {
|
|
case SOCKET_ADDRESS_TYPE_INET:
|
|
fd = inet_listen_saddr(&addr->u.inet, 0, num, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_TYPE_UNIX:
|
|
fd = unix_listen_saddr(&addr->u.q_unix, num, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_TYPE_FD:
|
|
fd = socket_get_fd(addr->u.fd.str, num, errp);
|
|
break;
|
|
|
|
case SOCKET_ADDRESS_TYPE_VSOCK:
|
|
fd = vsock_listen_saddr(&addr->u.vsock, num, errp);
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
void socket_listen_cleanup(int fd, Error **errp)
|
|
{
|
|
SocketAddress *addr;
|
|
|
|
addr = socket_local_address(fd, errp);
|
|
if (!addr) {
|
|
return;
|
|
}
|
|
|
|
if (addr->type == SOCKET_ADDRESS_TYPE_UNIX
|
|
&& addr->u.q_unix.path) {
|
|
if (unlink(addr->u.q_unix.path) < 0 && errno != ENOENT) {
|
|
error_setg_errno(errp, errno,
|
|
"Failed to unlink socket %s",
|
|
addr->u.q_unix.path);
|
|
}
|
|
}
|
|
|
|
qapi_free_SocketAddress(addr);
|
|
}
|
|
|
|
int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp)
|
|
{
|
|
int fd;
|
|
|
|
/*
|
|
* TODO SOCKET_ADDRESS_TYPE_FD when fd is AF_INET or AF_INET6
|
|
* (although other address families can do SOCK_DGRAM, too)
|
|
*/
|
|
switch (remote->type) {
|
|
case SOCKET_ADDRESS_TYPE_INET:
|
|
fd = inet_dgram_saddr(&remote->u.inet,
|
|
local ? &local->u.inet : NULL, errp);
|
|
break;
|
|
|
|
default:
|
|
error_setg(errp, "socket type unsupported for datagram");
|
|
fd = -1;
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
|
|
static SocketAddress *
|
|
socket_sockaddr_to_address_inet(struct sockaddr_storage *sa,
|
|
socklen_t salen,
|
|
Error **errp)
|
|
{
|
|
char host[NI_MAXHOST];
|
|
char serv[NI_MAXSERV];
|
|
SocketAddress *addr;
|
|
InetSocketAddress *inet;
|
|
int ret;
|
|
|
|
ret = getnameinfo((struct sockaddr *)sa, salen,
|
|
host, sizeof(host),
|
|
serv, sizeof(serv),
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
if (ret != 0) {
|
|
error_setg(errp, "Cannot format numeric socket address: %s",
|
|
gai_strerror(ret));
|
|
return NULL;
|
|
}
|
|
|
|
addr = g_new0(SocketAddress, 1);
|
|
addr->type = SOCKET_ADDRESS_TYPE_INET;
|
|
inet = &addr->u.inet;
|
|
inet->host = g_strdup(host);
|
|
inet->port = g_strdup(serv);
|
|
if (sa->ss_family == AF_INET) {
|
|
inet->has_ipv4 = inet->ipv4 = true;
|
|
} else {
|
|
inet->has_ipv6 = inet->ipv6 = true;
|
|
}
|
|
|
|
return addr;
|
|
}
|
|
|
|
|
|
#ifndef WIN32
|
|
static SocketAddress *
|
|
socket_sockaddr_to_address_unix(struct sockaddr_storage *sa,
|
|
socklen_t salen,
|
|
Error **errp)
|
|
{
|
|
SocketAddress *addr;
|
|
struct sockaddr_un *su = (struct sockaddr_un *)sa;
|
|
|
|
addr = g_new0(SocketAddress, 1);
|
|
addr->type = SOCKET_ADDRESS_TYPE_UNIX;
|
|
if (su->sun_path[0]) {
|
|
addr->u.q_unix.path = g_strndup(su->sun_path, sizeof(su->sun_path));
|
|
}
|
|
|
|
return addr;
|
|
}
|
|
#endif /* WIN32 */
|
|
|
|
#ifdef CONFIG_AF_VSOCK
|
|
static SocketAddress *
|
|
socket_sockaddr_to_address_vsock(struct sockaddr_storage *sa,
|
|
socklen_t salen,
|
|
Error **errp)
|
|
{
|
|
SocketAddress *addr;
|
|
VsockSocketAddress *vaddr;
|
|
struct sockaddr_vm *svm = (struct sockaddr_vm *)sa;
|
|
|
|
addr = g_new0(SocketAddress, 1);
|
|
addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
|
|
vaddr = &addr->u.vsock;
|
|
vaddr->cid = g_strdup_printf("%u", svm->svm_cid);
|
|
vaddr->port = g_strdup_printf("%u", svm->svm_port);
|
|
|
|
return addr;
|
|
}
|
|
#endif /* CONFIG_AF_VSOCK */
|
|
|
|
SocketAddress *
|
|
socket_sockaddr_to_address(struct sockaddr_storage *sa,
|
|
socklen_t salen,
|
|
Error **errp)
|
|
{
|
|
switch (sa->ss_family) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
return socket_sockaddr_to_address_inet(sa, salen, errp);
|
|
|
|
#ifndef WIN32
|
|
case AF_UNIX:
|
|
return socket_sockaddr_to_address_unix(sa, salen, errp);
|
|
#endif /* WIN32 */
|
|
|
|
#ifdef CONFIG_AF_VSOCK
|
|
case AF_VSOCK:
|
|
return socket_sockaddr_to_address_vsock(sa, salen, errp);
|
|
#endif
|
|
|
|
default:
|
|
error_setg(errp, "socket family %d unsupported",
|
|
sa->ss_family);
|
|
return NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
SocketAddress *socket_local_address(int fd, Error **errp)
|
|
{
|
|
struct sockaddr_storage ss;
|
|
socklen_t sslen = sizeof(ss);
|
|
|
|
if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0) {
|
|
error_setg_errno(errp, errno, "%s",
|
|
"Unable to query local socket address");
|
|
return NULL;
|
|
}
|
|
|
|
return socket_sockaddr_to_address(&ss, sslen, errp);
|
|
}
|
|
|
|
|
|
SocketAddress *socket_remote_address(int fd, Error **errp)
|
|
{
|
|
struct sockaddr_storage ss;
|
|
socklen_t sslen = sizeof(ss);
|
|
|
|
if (getpeername(fd, (struct sockaddr *)&ss, &sslen) < 0) {
|
|
error_setg_errno(errp, errno, "%s",
|
|
"Unable to query remote socket address");
|
|
return NULL;
|
|
}
|
|
|
|
return socket_sockaddr_to_address(&ss, sslen, errp);
|
|
}
|
|
|
|
|
|
SocketAddress *socket_address_flatten(SocketAddressLegacy *addr_legacy)
|
|
{
|
|
SocketAddress *addr;
|
|
|
|
if (!addr_legacy) {
|
|
return NULL;
|
|
}
|
|
|
|
addr = g_new(SocketAddress, 1);
|
|
|
|
switch (addr_legacy->type) {
|
|
case SOCKET_ADDRESS_LEGACY_KIND_INET:
|
|
addr->type = SOCKET_ADDRESS_TYPE_INET;
|
|
QAPI_CLONE_MEMBERS(InetSocketAddress, &addr->u.inet,
|
|
addr_legacy->u.inet.data);
|
|
break;
|
|
case SOCKET_ADDRESS_LEGACY_KIND_UNIX:
|
|
addr->type = SOCKET_ADDRESS_TYPE_UNIX;
|
|
QAPI_CLONE_MEMBERS(UnixSocketAddress, &addr->u.q_unix,
|
|
addr_legacy->u.q_unix.data);
|
|
break;
|
|
case SOCKET_ADDRESS_LEGACY_KIND_VSOCK:
|
|
addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
|
|
QAPI_CLONE_MEMBERS(VsockSocketAddress, &addr->u.vsock,
|
|
addr_legacy->u.vsock.data);
|
|
break;
|
|
case SOCKET_ADDRESS_LEGACY_KIND_FD:
|
|
addr->type = SOCKET_ADDRESS_TYPE_FD;
|
|
QAPI_CLONE_MEMBERS(String, &addr->u.fd, addr_legacy->u.fd.data);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
|
|
return addr;
|
|
}
|