mirror of
https://github.com/Motorhead1991/qemu.git
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build: move libqemuutil.a components to util/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
parent
f157ebba2d
commit
baacf04799
31 changed files with 15 additions and 13 deletions
970
util/qemu-sockets.c
Normal file
970
util/qemu-sockets.c
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@ -0,0 +1,970 @@
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/*
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* inet and unix socket functions for qemu
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*
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <unistd.h>
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#include "monitor/monitor.h"
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#include "qemu/sockets.h"
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#include "qemu-common.h" /* for qemu_isdigit */
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#include "qemu/main-loop.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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static const int on=1, off=0;
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/* used temporarely until all users are converted to QemuOpts */
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static QemuOptsList dummy_opts = {
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.name = "dummy",
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.head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
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.desc = {
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{
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.name = "path",
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.type = QEMU_OPT_STRING,
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},{
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.name = "host",
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.type = QEMU_OPT_STRING,
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},{
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.name = "port",
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.type = QEMU_OPT_STRING,
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},{
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.name = "to",
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.type = QEMU_OPT_NUMBER,
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},{
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.name = "ipv4",
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.type = QEMU_OPT_BOOL,
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},{
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.name = "ipv6",
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.type = QEMU_OPT_BOOL,
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},
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{ /* end if list */ }
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},
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};
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static int inet_getport(struct addrinfo *e)
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{
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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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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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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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const char *inet_strfamily(int family)
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{
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switch (family) {
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case PF_INET6: return "ipv6";
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case PF_INET: return "ipv4";
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case PF_UNIX: return "unix";
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}
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return "unknown";
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}
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int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
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{
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struct addrinfo ai,*res,*e;
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const char *addr;
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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 slisten, rc, to, port_min, port_max, p;
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memset(&ai,0, sizeof(ai));
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ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
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ai.ai_family = PF_UNSPEC;
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ai.ai_socktype = SOCK_STREAM;
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if ((qemu_opt_get(opts, "host") == NULL) ||
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(qemu_opt_get(opts, "port") == NULL)) {
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error_setg(errp, "host and/or port not specified");
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return -1;
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}
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pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
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addr = qemu_opt_get(opts, "host");
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to = qemu_opt_get_number(opts, "to", 0);
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if (qemu_opt_get_bool(opts, "ipv4", 0))
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ai.ai_family = PF_INET;
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if (qemu_opt_get_bool(opts, "ipv6", 0))
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ai.ai_family = PF_INET6;
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/* lookup */
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if (port_offset)
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snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);
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rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
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if (rc != 0) {
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error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
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gai_strerror(rc));
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return -1;
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}
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/* create socket + bind */
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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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slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
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if (slisten < 0) {
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if (!e->ai_next) {
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error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
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}
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continue;
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}
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setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
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#ifdef IPV6_V6ONLY
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if (e->ai_family == PF_INET6) {
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/* listen on both ipv4 and ipv6 */
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setsockopt(slisten,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&off,
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sizeof(off));
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}
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#endif
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port_min = inet_getport(e);
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port_max = to ? 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);
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if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
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goto listen;
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}
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if (p == port_max) {
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if (!e->ai_next) {
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error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);
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}
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}
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}
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closesocket(slisten);
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}
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freeaddrinfo(res);
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return -1;
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listen:
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if (listen(slisten,1) != 0) {
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error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED);
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closesocket(slisten);
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freeaddrinfo(res);
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return -1;
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}
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snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset);
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qemu_opt_set(opts, "host", uaddr);
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qemu_opt_set(opts, "port", uport);
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qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off");
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qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off");
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freeaddrinfo(res);
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return slisten;
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}
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#ifdef _WIN32
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#define QEMU_SOCKET_RC_INPROGRESS(rc) \
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((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY)
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#else
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#define QEMU_SOCKET_RC_INPROGRESS(rc) \
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((rc) == -EINPROGRESS)
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#endif
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/* Struct to store connect state for non blocking connect */
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typedef struct ConnectState {
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int fd;
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struct addrinfo *addr_list;
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struct addrinfo *current_addr;
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NonBlockingConnectHandler *callback;
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void *opaque;
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} ConnectState;
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static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,
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ConnectState *connect_state, Error **errp);
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static void wait_for_connect(void *opaque)
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{
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ConnectState *s = opaque;
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int val = 0, rc = 0;
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socklen_t valsize = sizeof(val);
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bool in_progress;
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qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
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do {
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rc = getsockopt(s->fd, SOL_SOCKET, SO_ERROR, (void *) &val, &valsize);
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} while (rc == -1 && socket_error() == EINTR);
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/* update rc to contain error */
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if (!rc && val) {
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rc = -1;
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}
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/* connect error */
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if (rc < 0) {
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closesocket(s->fd);
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s->fd = rc;
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}
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/* try to connect to the next address on the list */
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if (s->current_addr) {
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while (s->current_addr->ai_next != NULL && s->fd < 0) {
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s->current_addr = s->current_addr->ai_next;
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s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL);
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/* connect in progress */
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if (in_progress) {
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return;
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}
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}
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freeaddrinfo(s->addr_list);
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}
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if (s->callback) {
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s->callback(s->fd, s->opaque);
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}
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g_free(s);
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}
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static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,
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ConnectState *connect_state, Error **errp)
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{
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int sock, rc;
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*in_progress = false;
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sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
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if (sock < 0) {
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error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
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return -1;
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}
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qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
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if (connect_state != NULL) {
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socket_set_nonblock(sock);
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}
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/* connect to peer */
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do {
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rc = 0;
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if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
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rc = -socket_error();
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}
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} while (rc == -EINTR);
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if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
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connect_state->fd = sock;
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qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect,
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connect_state);
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*in_progress = true;
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} else if (rc < 0) {
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error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED);
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closesocket(sock);
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return -1;
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}
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return sock;
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}
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static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp)
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{
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struct addrinfo ai, *res;
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int rc;
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const char *addr;
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const char *port;
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memset(&ai, 0, sizeof(ai));
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ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
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ai.ai_family = PF_UNSPEC;
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ai.ai_socktype = SOCK_STREAM;
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addr = qemu_opt_get(opts, "host");
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port = qemu_opt_get(opts, "port");
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if (addr == NULL || port == NULL) {
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error_setg(errp, "host and/or port not specified");
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return NULL;
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}
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if (qemu_opt_get_bool(opts, "ipv4", 0)) {
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ai.ai_family = PF_INET;
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}
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if (qemu_opt_get_bool(opts, "ipv6", 0)) {
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ai.ai_family = PF_INET6;
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}
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/* lookup */
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rc = getaddrinfo(addr, port, &ai, &res);
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if (rc != 0) {
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error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
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gai_strerror(rc));
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return NULL;
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}
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return res;
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}
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|
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/**
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* Create a socket and connect it to an address.
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*
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* @opts: QEMU options, recognized parameters strings "host" and "port",
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* bools "ipv4" and "ipv6".
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* @errp: set on error
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* @callback: callback function for non-blocking connect
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* @opaque: opaque for callback function
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*
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* Returns: -1 on error, file descriptor on success.
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*
|
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* If @callback is non-null, the connect is non-blocking. If this
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* function succeeds, callback will be called when the connection
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* completes, with the file descriptor on success, or -1 on error.
|
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*/
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int inet_connect_opts(QemuOpts *opts, Error **errp,
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NonBlockingConnectHandler *callback, void *opaque)
|
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{
|
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struct addrinfo *res, *e;
|
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int sock = -1;
|
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bool in_progress;
|
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ConnectState *connect_state = NULL;
|
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|
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res = inet_parse_connect_opts(opts, errp);
|
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if (!res) {
|
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return -1;
|
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}
|
||||
|
||||
if (callback != NULL) {
|
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connect_state = g_malloc0(sizeof(*connect_state));
|
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connect_state->addr_list = res;
|
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connect_state->callback = callback;
|
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connect_state->opaque = opaque;
|
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}
|
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|
||||
for (e = res; e != NULL; e = e->ai_next) {
|
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if (connect_state != NULL) {
|
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connect_state->current_addr = e;
|
||||
}
|
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sock = inet_connect_addr(e, &in_progress, connect_state, errp);
|
||||
if (in_progress) {
|
||||
return sock;
|
||||
} else if (sock >= 0) {
|
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/* non blocking socket immediate success, call callback */
|
||||
if (callback != NULL) {
|
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callback(sock, opaque);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
g_free(connect_state);
|
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freeaddrinfo(res);
|
||||
return sock;
|
||||
}
|
||||
|
||||
int inet_dgram_opts(QemuOpts *opts, Error **errp)
|
||||
{
|
||||
struct addrinfo ai, *peer = NULL, *local = NULL;
|
||||
const char *addr;
|
||||
const char *port;
|
||||
int sock = -1, rc;
|
||||
|
||||
/* lookup peer addr */
|
||||
memset(&ai,0, sizeof(ai));
|
||||
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
|
||||
ai.ai_family = PF_UNSPEC;
|
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ai.ai_socktype = SOCK_DGRAM;
|
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|
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addr = qemu_opt_get(opts, "host");
|
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port = qemu_opt_get(opts, "port");
|
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if (addr == NULL || strlen(addr) == 0) {
|
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addr = "localhost";
|
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}
|
||||
if (port == NULL || strlen(port) == 0) {
|
||||
error_setg(errp, "remote port not specified");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (qemu_opt_get_bool(opts, "ipv4", 0))
|
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ai.ai_family = PF_INET;
|
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if (qemu_opt_get_bool(opts, "ipv6", 0))
|
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ai.ai_family = PF_INET6;
|
||||
|
||||
if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
|
||||
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
||||
gai_strerror(rc));
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* lookup local addr */
|
||||
memset(&ai,0, sizeof(ai));
|
||||
ai.ai_flags = AI_PASSIVE;
|
||||
ai.ai_family = peer->ai_family;
|
||||
ai.ai_socktype = SOCK_DGRAM;
|
||||
|
||||
addr = qemu_opt_get(opts, "localaddr");
|
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port = qemu_opt_get(opts, "localport");
|
||||
if (addr == NULL || strlen(addr) == 0) {
|
||||
addr = NULL;
|
||||
}
|
||||
if (!port || strlen(port) == 0)
|
||||
port = "0";
|
||||
|
||||
if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
|
||||
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_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
|
||||
goto err;
|
||||
}
|
||||
setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
|
||||
|
||||
/* bind socket */
|
||||
if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
|
||||
error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* connect to peer */
|
||||
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
|
||||
error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED);
|
||||
goto err;
|
||||
}
|
||||
|
||||
freeaddrinfo(local);
|
||||
freeaddrinfo(peer);
|
||||
return sock;
|
||||
|
||||
err:
|
||||
if (-1 != sock)
|
||||
closesocket(sock);
|
||||
if (local)
|
||||
freeaddrinfo(local);
|
||||
if (peer)
|
||||
freeaddrinfo(peer);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* compatibility wrapper */
|
||||
static InetSocketAddress *inet_parse(const char *str, Error **errp)
|
||||
{
|
||||
InetSocketAddress *addr;
|
||||
const char *optstr, *h;
|
||||
char host[64];
|
||||
char port[33];
|
||||
int to;
|
||||
int pos;
|
||||
|
||||
addr = g_new0(InetSocketAddress, 1);
|
||||
|
||||
/* parse address */
|
||||
if (str[0] == ':') {
|
||||
/* no host given */
|
||||
host[0] = '\0';
|
||||
if (1 != sscanf(str, ":%32[^,]%n", port, &pos)) {
|
||||
error_setg(errp, "error parsing port in address '%s'", str);
|
||||
goto fail;
|
||||
}
|
||||
} else if (str[0] == '[') {
|
||||
/* IPv6 addr */
|
||||
if (2 != sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos)) {
|
||||
error_setg(errp, "error parsing IPv6 address '%s'", str);
|
||||
goto fail;
|
||||
}
|
||||
addr->ipv6 = addr->has_ipv6 = true;
|
||||
} else if (qemu_isdigit(str[0])) {
|
||||
/* IPv4 addr */
|
||||
if (2 != sscanf(str, "%64[0-9.]:%32[^,]%n", host, port, &pos)) {
|
||||
error_setg(errp, "error parsing IPv4 address '%s'", str);
|
||||
goto fail;
|
||||
}
|
||||
addr->ipv4 = addr->has_ipv4 = true;
|
||||
} else {
|
||||
/* hostname */
|
||||
if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) {
|
||||
error_setg(errp, "error parsing address '%s'", str);
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
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");
|
||||
goto fail;
|
||||
}
|
||||
addr->has_to = true;
|
||||
addr->to = to;
|
||||
}
|
||||
if (strstr(optstr, ",ipv4")) {
|
||||
addr->ipv4 = addr->has_ipv4 = true;
|
||||
}
|
||||
if (strstr(optstr, ",ipv6")) {
|
||||
addr->ipv6 = addr->has_ipv6 = true;
|
||||
}
|
||||
return addr;
|
||||
|
||||
fail:
|
||||
qapi_free_InetSocketAddress(addr);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void inet_addr_to_opts(QemuOpts *opts, InetSocketAddress *addr)
|
||||
{
|
||||
bool ipv4 = addr->ipv4 || !addr->has_ipv4;
|
||||
bool ipv6 = addr->ipv6 || !addr->has_ipv6;
|
||||
|
||||
if (!ipv4 || !ipv6) {
|
||||
qemu_opt_set_bool(opts, "ipv4", ipv4);
|
||||
qemu_opt_set_bool(opts, "ipv6", ipv6);
|
||||
}
|
||||
if (addr->has_to) {
|
||||
char to[20];
|
||||
snprintf(to, sizeof(to), "%d", addr->to);
|
||||
qemu_opt_set(opts, "to", to);
|
||||
}
|
||||
qemu_opt_set(opts, "host", addr->host);
|
||||
qemu_opt_set(opts, "port", addr->port);
|
||||
}
|
||||
|
||||
int inet_listen(const char *str, char *ostr, int olen,
|
||||
int socktype, int port_offset, Error **errp)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
char *optstr;
|
||||
int sock = -1;
|
||||
InetSocketAddress *addr;
|
||||
|
||||
addr = inet_parse(str, errp);
|
||||
if (addr != NULL) {
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
inet_addr_to_opts(opts, addr);
|
||||
qapi_free_InetSocketAddress(addr);
|
||||
sock = inet_listen_opts(opts, port_offset, errp);
|
||||
if (sock != -1 && ostr) {
|
||||
optstr = strchr(str, ',');
|
||||
if (qemu_opt_get_bool(opts, "ipv6", 0)) {
|
||||
snprintf(ostr, olen, "[%s]:%s%s",
|
||||
qemu_opt_get(opts, "host"),
|
||||
qemu_opt_get(opts, "port"),
|
||||
optstr ? optstr : "");
|
||||
} else {
|
||||
snprintf(ostr, olen, "%s:%s%s",
|
||||
qemu_opt_get(opts, "host"),
|
||||
qemu_opt_get(opts, "port"),
|
||||
optstr ? optstr : "");
|
||||
}
|
||||
}
|
||||
qemu_opts_del(opts);
|
||||
}
|
||||
return sock;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
int sock = -1;
|
||||
InetSocketAddress *addr;
|
||||
|
||||
addr = inet_parse(str, errp);
|
||||
if (addr != NULL) {
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
inet_addr_to_opts(opts, addr);
|
||||
qapi_free_InetSocketAddress(addr);
|
||||
sock = inet_connect_opts(opts, errp, NULL, NULL);
|
||||
qemu_opts_del(opts);
|
||||
}
|
||||
return sock;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a non-blocking socket and connect it to an address.
|
||||
* Calls the callback function with fd in case of success or -1 in case of
|
||||
* error.
|
||||
*
|
||||
* @str: address string
|
||||
* @callback: callback function that is called when connect completes,
|
||||
* cannot be NULL.
|
||||
* @opaque: opaque for callback function
|
||||
* @errp: set in case of an error
|
||||
*
|
||||
* Returns: -1 on immediate error, file descriptor on success.
|
||||
**/
|
||||
int inet_nonblocking_connect(const char *str,
|
||||
NonBlockingConnectHandler *callback,
|
||||
void *opaque, Error **errp)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
int sock = -1;
|
||||
InetSocketAddress *addr;
|
||||
|
||||
g_assert(callback != NULL);
|
||||
|
||||
addr = inet_parse(str, errp);
|
||||
if (addr != NULL) {
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
inet_addr_to_opts(opts, addr);
|
||||
qapi_free_InetSocketAddress(addr);
|
||||
sock = inet_connect_opts(opts, errp, callback, opaque);
|
||||
qemu_opts_del(opts);
|
||||
}
|
||||
return sock;
|
||||
}
|
||||
|
||||
#ifndef _WIN32
|
||||
|
||||
int unix_listen_opts(QemuOpts *opts, Error **errp)
|
||||
{
|
||||
struct sockaddr_un un;
|
||||
const char *path = qemu_opt_get(opts, "path");
|
||||
int sock, fd;
|
||||
|
||||
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
||||
if (sock < 0) {
|
||||
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&un, 0, sizeof(un));
|
||||
un.sun_family = AF_UNIX;
|
||||
if (path && strlen(path)) {
|
||||
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
|
||||
} else {
|
||||
char *tmpdir = getenv("TMPDIR");
|
||||
snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
|
||||
tmpdir ? tmpdir : "/tmp");
|
||||
/*
|
||||
* 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(un.sun_path); close(fd);
|
||||
qemu_opt_set(opts, "path", un.sun_path);
|
||||
}
|
||||
|
||||
unlink(un.sun_path);
|
||||
if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
|
||||
error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);
|
||||
goto err;
|
||||
}
|
||||
if (listen(sock, 1) < 0) {
|
||||
error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED);
|
||||
goto err;
|
||||
}
|
||||
|
||||
return sock;
|
||||
|
||||
err:
|
||||
closesocket(sock);
|
||||
return -1;
|
||||
}
|
||||
|
||||
int unix_connect_opts(QemuOpts *opts, Error **errp,
|
||||
NonBlockingConnectHandler *callback, void *opaque)
|
||||
{
|
||||
struct sockaddr_un un;
|
||||
const char *path = qemu_opt_get(opts, "path");
|
||||
ConnectState *connect_state = NULL;
|
||||
int sock, rc;
|
||||
|
||||
if (NULL == path) {
|
||||
error_setg(errp, "unix connect: no path specified\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
||||
if (sock < 0) {
|
||||
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);
|
||||
return -1;
|
||||
}
|
||||
if (callback != NULL) {
|
||||
connect_state = g_malloc0(sizeof(*connect_state));
|
||||
connect_state->callback = callback;
|
||||
connect_state->opaque = opaque;
|
||||
socket_set_nonblock(sock);
|
||||
}
|
||||
|
||||
memset(&un, 0, sizeof(un));
|
||||
un.sun_family = AF_UNIX;
|
||||
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
|
||||
|
||||
/* connect to peer */
|
||||
do {
|
||||
rc = 0;
|
||||
if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) {
|
||||
rc = -socket_error();
|
||||
}
|
||||
} while (rc == -EINTR);
|
||||
|
||||
if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
|
||||
connect_state->fd = sock;
|
||||
qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect,
|
||||
connect_state);
|
||||
return sock;
|
||||
} else if (rc >= 0) {
|
||||
/* non blocking socket immediate success, call callback */
|
||||
if (callback != NULL) {
|
||||
callback(sock, opaque);
|
||||
}
|
||||
}
|
||||
|
||||
if (rc < 0) {
|
||||
error_set_errno(errp, -rc, QERR_SOCKET_CONNECT_FAILED);
|
||||
close(sock);
|
||||
sock = -1;
|
||||
}
|
||||
|
||||
g_free(connect_state);
|
||||
return sock;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
int unix_listen_opts(QemuOpts *opts, Error **errp)
|
||||
{
|
||||
error_setg(errp, "unix sockets are not available on windows");
|
||||
errno = ENOTSUP;
|
||||
return -1;
|
||||
}
|
||||
|
||||
int unix_connect_opts(QemuOpts *opts, Error **errp,
|
||||
NonBlockingConnectHandler *callback, void *opaque)
|
||||
{
|
||||
error_setg(errp, "unix sockets are not available on windows");
|
||||
errno = ENOTSUP;
|
||||
return -1;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* compatibility wrapper */
|
||||
int unix_listen(const char *str, char *ostr, int olen, Error **errp)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
char *path, *optstr;
|
||||
int sock, len;
|
||||
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
|
||||
optstr = strchr(str, ',');
|
||||
if (optstr) {
|
||||
len = optstr - str;
|
||||
if (len) {
|
||||
path = g_malloc(len+1);
|
||||
snprintf(path, len+1, "%.*s", len, str);
|
||||
qemu_opt_set(opts, "path", path);
|
||||
g_free(path);
|
||||
}
|
||||
} else {
|
||||
qemu_opt_set(opts, "path", str);
|
||||
}
|
||||
|
||||
sock = unix_listen_opts(opts, errp);
|
||||
|
||||
if (sock != -1 && ostr)
|
||||
snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
|
||||
qemu_opts_del(opts);
|
||||
return sock;
|
||||
}
|
||||
|
||||
int unix_connect(const char *path, Error **errp)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
int sock;
|
||||
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
qemu_opt_set(opts, "path", path);
|
||||
sock = unix_connect_opts(opts, errp, NULL, NULL);
|
||||
qemu_opts_del(opts);
|
||||
return sock;
|
||||
}
|
||||
|
||||
|
||||
int unix_nonblocking_connect(const char *path,
|
||||
NonBlockingConnectHandler *callback,
|
||||
void *opaque, Error **errp)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
int sock = -1;
|
||||
|
||||
g_assert(callback != NULL);
|
||||
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
qemu_opt_set(opts, "path", path);
|
||||
sock = unix_connect_opts(opts, errp, callback, opaque);
|
||||
qemu_opts_del(opts);
|
||||
return sock;
|
||||
}
|
||||
|
||||
SocketAddress *socket_parse(const char *str, Error **errp)
|
||||
{
|
||||
SocketAddress *addr = NULL;
|
||||
|
||||
addr = g_new(SocketAddress, 1);
|
||||
if (strstart(str, "unix:", NULL)) {
|
||||
if (str[5] == '\0') {
|
||||
error_setg(errp, "invalid Unix socket address\n");
|
||||
goto fail;
|
||||
} else {
|
||||
addr->kind = SOCKET_ADDRESS_KIND_UNIX;
|
||||
addr->q_unix = g_new(UnixSocketAddress, 1);
|
||||
addr->q_unix->path = g_strdup(str + 5);
|
||||
}
|
||||
} else if (strstart(str, "fd:", NULL)) {
|
||||
if (str[3] == '\0') {
|
||||
error_setg(errp, "invalid file descriptor address\n");
|
||||
goto fail;
|
||||
} else {
|
||||
addr->kind = SOCKET_ADDRESS_KIND_FD;
|
||||
addr->fd = g_new(String, 1);
|
||||
addr->fd->str = g_strdup(str + 3);
|
||||
}
|
||||
} else {
|
||||
addr->kind = SOCKET_ADDRESS_KIND_INET;
|
||||
addr->inet = g_new(InetSocketAddress, 1);
|
||||
addr->inet = inet_parse(str, errp);
|
||||
if (addr->inet == NULL) {
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
return addr;
|
||||
|
||||
fail:
|
||||
qapi_free_SocketAddress(addr);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
int socket_connect(SocketAddress *addr, Error **errp,
|
||||
NonBlockingConnectHandler *callback, void *opaque)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
int fd;
|
||||
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
switch (addr->kind) {
|
||||
case SOCKET_ADDRESS_KIND_INET:
|
||||
inet_addr_to_opts(opts, addr->inet);
|
||||
fd = inet_connect_opts(opts, errp, callback, opaque);
|
||||
break;
|
||||
|
||||
case SOCKET_ADDRESS_KIND_UNIX:
|
||||
qemu_opt_set(opts, "path", addr->q_unix->path);
|
||||
fd = unix_connect_opts(opts, errp, callback, opaque);
|
||||
break;
|
||||
|
||||
case SOCKET_ADDRESS_KIND_FD:
|
||||
fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
|
||||
if (callback) {
|
||||
callback(fd, opaque);
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
abort();
|
||||
}
|
||||
qemu_opts_del(opts);
|
||||
return fd;
|
||||
}
|
||||
|
||||
int socket_listen(SocketAddress *addr, Error **errp)
|
||||
{
|
||||
QemuOpts *opts;
|
||||
int fd;
|
||||
|
||||
opts = qemu_opts_create_nofail(&dummy_opts);
|
||||
switch (addr->kind) {
|
||||
case SOCKET_ADDRESS_KIND_INET:
|
||||
inet_addr_to_opts(opts, addr->inet);
|
||||
fd = inet_listen_opts(opts, 0, errp);
|
||||
break;
|
||||
|
||||
case SOCKET_ADDRESS_KIND_UNIX:
|
||||
qemu_opt_set(opts, "path", addr->q_unix->path);
|
||||
fd = unix_listen_opts(opts, errp);
|
||||
break;
|
||||
|
||||
case SOCKET_ADDRESS_KIND_FD:
|
||||
fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
|
||||
break;
|
||||
|
||||
default:
|
||||
abort();
|
||||
}
|
||||
qemu_opts_del(opts);
|
||||
return fd;
|
||||
}
|
||||
|
||||
#ifdef _WIN32
|
||||
static void socket_cleanup(void)
|
||||
{
|
||||
WSACleanup();
|
||||
}
|
||||
#endif
|
||||
|
||||
int socket_init(void)
|
||||
{
|
||||
#ifdef _WIN32
|
||||
WSADATA Data;
|
||||
int ret, err;
|
||||
|
||||
ret = WSAStartup(MAKEWORD(2,2), &Data);
|
||||
if (ret != 0) {
|
||||
err = WSAGetLastError();
|
||||
fprintf(stderr, "WSAStartup: %d\n", err);
|
||||
return -1;
|
||||
}
|
||||
atexit(socket_cleanup);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue