58455eb9f2
setsockopt needs a type cast for MinGW. That type cast is missing in a recent commit which results in a compiler warning. Like for other socket related functions which have the same problem, we add a 'qemu_setsockopt' macro which provides that type cast where needed and use the new macro to avoid the warning. A 'qemu_getsockopt' is also added and can be used for future modifications. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
831 lines
23 KiB
C
831 lines
23 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 <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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|
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#include "qemu_socket.h"
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#include "qemu-common.h" /* for qemu_isdigit */
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#include "main-loop.h"
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|
|
|
#ifndef AI_ADDRCONFIG
|
|
# define AI_ADDRCONFIG 0
|
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#endif
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|
|
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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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|
|
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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) {
|
|
case PF_INET6:
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i6 = (void*)e->ai_addr;
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|
return ntohs(i6->sin6_port);
|
|
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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|
|
|
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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int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
|
|
{
|
|
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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|
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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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|
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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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fprintf(stderr, "%s: host and/or port not specified\n", __FUNCTION__);
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error_set(errp, QERR_SOCKET_CREATE_FAILED);
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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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fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
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gai_strerror(rc));
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error_set(errp, QERR_SOCKET_CREATE_FAILED);
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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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fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
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inet_strfamily(e->ai_family), strerror(errno));
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if (!e->ai_next) {
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error_set(errp, 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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fprintf(stderr,"%s: bind(%s,%s,%d): %s\n", __FUNCTION__,
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inet_strfamily(e->ai_family), uaddr, inet_getport(e),
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strerror(errno));
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if (!e->ai_next) {
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error_set(errp, 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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fprintf(stderr, "%s: FAILED\n", __FUNCTION__);
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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(errp, QERR_SOCKET_LISTEN_FAILED);
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perror("listen");
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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);
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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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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);
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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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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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return;
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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)
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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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fprintf(stderr, "%s: socket(%s): %s\n", __func__,
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inet_strfamily(addr->ai_family), strerror(errno));
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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) {
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
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return sock;
|
|
}
|
|
|
|
static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp)
|
|
{
|
|
struct addrinfo ai, *res;
|
|
int rc;
|
|
const char *addr;
|
|
const char *port;
|
|
|
|
memset(&ai, 0, sizeof(ai));
|
|
|
|
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;
|
|
|
|
addr = qemu_opt_get(opts, "host");
|
|
port = qemu_opt_get(opts, "port");
|
|
if (addr == NULL || port == NULL) {
|
|
fprintf(stderr,
|
|
"inet_parse_connect_opts: host and/or port not specified\n");
|
|
error_set(errp, QERR_SOCKET_CREATE_FAILED);
|
|
return NULL;
|
|
}
|
|
|
|
if (qemu_opt_get_bool(opts, "ipv4", 0)) {
|
|
ai.ai_family = PF_INET;
|
|
}
|
|
if (qemu_opt_get_bool(opts, "ipv6", 0)) {
|
|
ai.ai_family = PF_INET6;
|
|
}
|
|
|
|
/* lookup */
|
|
rc = getaddrinfo(addr, port, &ai, &res);
|
|
if (rc != 0) {
|
|
fprintf(stderr, "getaddrinfo(%s,%s): %s\n", addr, port,
|
|
gai_strerror(rc));
|
|
error_set(errp, QERR_SOCKET_CREATE_FAILED);
|
|
return NULL;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Create a socket and connect it to an address.
|
|
*
|
|
* @opts: QEMU options, recognized parameters strings "host" and "port",
|
|
* bools "ipv4" and "ipv6".
|
|
* @errp: set on error
|
|
* @callback: callback function for non-blocking connect
|
|
* @opaque: opaque for callback function
|
|
*
|
|
* Returns: -1 on error, file descriptor on success.
|
|
*
|
|
* If @callback is non-null, the connect is non-blocking. If this
|
|
* function succeeds, callback will be called when the connection
|
|
* completes, with the file descriptor on success, or -1 on error.
|
|
*/
|
|
int inet_connect_opts(QemuOpts *opts, Error **errp,
|
|
NonBlockingConnectHandler *callback, void *opaque)
|
|
{
|
|
struct addrinfo *res, *e;
|
|
int sock = -1;
|
|
bool in_progress;
|
|
ConnectState *connect_state = NULL;
|
|
|
|
res = inet_parse_connect_opts(opts, errp);
|
|
if (!res) {
|
|
return -1;
|
|
}
|
|
|
|
if (callback != NULL) {
|
|
connect_state = g_malloc0(sizeof(*connect_state));
|
|
connect_state->addr_list = res;
|
|
connect_state->callback = callback;
|
|
connect_state->opaque = opaque;
|
|
}
|
|
|
|
for (e = res; e != NULL; e = e->ai_next) {
|
|
if (connect_state != NULL) {
|
|
connect_state->current_addr = e;
|
|
}
|
|
sock = inet_connect_addr(e, &in_progress, connect_state);
|
|
if (in_progress) {
|
|
return sock;
|
|
} else if (sock >= 0) {
|
|
/* non blocking socket immediate success, call callback */
|
|
if (callback != NULL) {
|
|
callback(sock, opaque);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (sock < 0) {
|
|
error_set(errp, QERR_SOCKET_CONNECT_FAILED);
|
|
}
|
|
g_free(connect_state);
|
|
freeaddrinfo(res);
|
|
return sock;
|
|
}
|
|
|
|
int inet_dgram_opts(QemuOpts *opts)
|
|
{
|
|
struct addrinfo ai, *peer = NULL, *local = NULL;
|
|
const char *addr;
|
|
const char *port;
|
|
char uaddr[INET6_ADDRSTRLEN+1];
|
|
char uport[33];
|
|
int sock = -1, rc;
|
|
|
|
/* lookup peer addr */
|
|
memset(&ai,0, sizeof(ai));
|
|
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
|
|
ai.ai_family = PF_UNSPEC;
|
|
ai.ai_socktype = SOCK_DGRAM;
|
|
|
|
addr = qemu_opt_get(opts, "host");
|
|
port = qemu_opt_get(opts, "port");
|
|
if (addr == NULL || strlen(addr) == 0) {
|
|
addr = "localhost";
|
|
}
|
|
if (port == NULL || strlen(port) == 0) {
|
|
fprintf(stderr, "inet_dgram: port not specified\n");
|
|
return -1;
|
|
}
|
|
|
|
if (qemu_opt_get_bool(opts, "ipv4", 0))
|
|
ai.ai_family = PF_INET;
|
|
if (qemu_opt_get_bool(opts, "ipv6", 0))
|
|
ai.ai_family = PF_INET6;
|
|
|
|
if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
|
|
fprintf(stderr,"getaddrinfo(%s,%s): %s\n", 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");
|
|
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))) {
|
|
fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
|
|
gai_strerror(rc));
|
|
goto err;
|
|
}
|
|
|
|
/* create socket */
|
|
sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
|
|
if (sock < 0) {
|
|
fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
|
|
inet_strfamily(peer->ai_family), strerror(errno));
|
|
goto err;
|
|
}
|
|
setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
|
|
|
|
/* bind socket */
|
|
if (getnameinfo((struct sockaddr*)local->ai_addr,local->ai_addrlen,
|
|
uaddr,INET6_ADDRSTRLEN,uport,32,
|
|
NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
|
|
fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
|
|
goto err;
|
|
}
|
|
if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
|
|
fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
|
|
inet_strfamily(local->ai_family), uaddr, inet_getport(local));
|
|
goto err;
|
|
}
|
|
|
|
/* connect to peer */
|
|
if (getnameinfo((struct sockaddr*)peer->ai_addr, peer->ai_addrlen,
|
|
uaddr, INET6_ADDRSTRLEN, uport, 32,
|
|
NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
|
|
fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
|
|
goto err;
|
|
}
|
|
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
|
|
fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
|
|
inet_strfamily(peer->ai_family),
|
|
peer->ai_canonname, uaddr, uport, strerror(errno));
|
|
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 int inet_parse(QemuOpts *opts, const char *str)
|
|
{
|
|
const char *optstr, *h;
|
|
char addr[64];
|
|
char port[33];
|
|
int pos;
|
|
|
|
/* parse address */
|
|
if (str[0] == ':') {
|
|
/* no host given */
|
|
addr[0] = '\0';
|
|
if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
|
|
fprintf(stderr, "%s: portonly parse error (%s)\n",
|
|
__FUNCTION__, str);
|
|
return -1;
|
|
}
|
|
} else if (str[0] == '[') {
|
|
/* IPv6 addr */
|
|
if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
|
|
fprintf(stderr, "%s: ipv6 parse error (%s)\n",
|
|
__FUNCTION__, str);
|
|
return -1;
|
|
}
|
|
qemu_opt_set(opts, "ipv6", "on");
|
|
} else if (qemu_isdigit(str[0])) {
|
|
/* IPv4 addr */
|
|
if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
|
|
fprintf(stderr, "%s: ipv4 parse error (%s)\n",
|
|
__FUNCTION__, str);
|
|
return -1;
|
|
}
|
|
qemu_opt_set(opts, "ipv4", "on");
|
|
} else {
|
|
/* hostname */
|
|
if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
|
|
fprintf(stderr, "%s: hostname parse error (%s)\n",
|
|
__FUNCTION__, str);
|
|
return -1;
|
|
}
|
|
}
|
|
qemu_opt_set(opts, "host", addr);
|
|
qemu_opt_set(opts, "port", port);
|
|
|
|
/* parse options */
|
|
optstr = str + pos;
|
|
h = strstr(optstr, ",to=");
|
|
if (h)
|
|
qemu_opt_set(opts, "to", h+4);
|
|
if (strstr(optstr, ",ipv4"))
|
|
qemu_opt_set(opts, "ipv4", "on");
|
|
if (strstr(optstr, ",ipv6"))
|
|
qemu_opt_set(opts, "ipv6", "on");
|
|
return 0;
|
|
}
|
|
|
|
int inet_listen(const char *str, char *ostr, int olen,
|
|
int socktype, int port_offset, Error **errp)
|
|
{
|
|
QemuOpts *opts;
|
|
char *optstr;
|
|
int sock = -1;
|
|
|
|
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
|
|
if (inet_parse(opts, str) == 0) {
|
|
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 : "");
|
|
}
|
|
}
|
|
} else {
|
|
error_set(errp, QERR_SOCKET_CREATE_FAILED);
|
|
}
|
|
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;
|
|
|
|
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
|
|
if (inet_parse(opts, str) == 0) {
|
|
sock = inet_connect_opts(opts, errp, NULL, NULL);
|
|
} else {
|
|
error_set(errp, QERR_SOCKET_CREATE_FAILED);
|
|
}
|
|
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;
|
|
|
|
g_assert(callback != NULL);
|
|
|
|
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
|
|
if (inet_parse(opts, str) == 0) {
|
|
sock = inet_connect_opts(opts, errp, callback, opaque);
|
|
} else {
|
|
error_set(errp, QERR_SOCKET_CREATE_FAILED);
|
|
}
|
|
qemu_opts_del(opts);
|
|
return sock;
|
|
}
|
|
|
|
#ifndef _WIN32
|
|
|
|
int unix_listen_opts(QemuOpts *opts)
|
|
{
|
|
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) {
|
|
perror("socket(unix)");
|
|
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) {
|
|
fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
|
|
goto err;
|
|
}
|
|
if (listen(sock, 1) < 0) {
|
|
fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
|
|
goto err;
|
|
}
|
|
|
|
return sock;
|
|
|
|
err:
|
|
closesocket(sock);
|
|
return -1;
|
|
}
|
|
|
|
int unix_connect_opts(QemuOpts *opts)
|
|
{
|
|
struct sockaddr_un un;
|
|
const char *path = qemu_opt_get(opts, "path");
|
|
int sock;
|
|
|
|
if (NULL == path) {
|
|
fprintf(stderr, "unix connect: no path specified\n");
|
|
return -1;
|
|
}
|
|
|
|
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
|
if (sock < 0) {
|
|
perror("socket(unix)");
|
|
return -1;
|
|
}
|
|
|
|
memset(&un, 0, sizeof(un));
|
|
un.sun_family = AF_UNIX;
|
|
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
|
|
if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
|
|
fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
|
|
close(sock);
|
|
return -1;
|
|
}
|
|
|
|
return sock;
|
|
}
|
|
|
|
/* compatibility wrapper */
|
|
int unix_listen(const char *str, char *ostr, int olen)
|
|
{
|
|
QemuOpts *opts;
|
|
char *path, *optstr;
|
|
int sock, len;
|
|
|
|
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
|
|
|
|
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);
|
|
|
|
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)
|
|
{
|
|
QemuOpts *opts;
|
|
int sock;
|
|
|
|
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
|
|
qemu_opt_set(opts, "path", path);
|
|
sock = unix_connect_opts(opts);
|
|
qemu_opts_del(opts);
|
|
return sock;
|
|
}
|
|
|
|
#else
|
|
|
|
int unix_listen_opts(QemuOpts *opts)
|
|
{
|
|
fprintf(stderr, "unix sockets are not available on windows\n");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
|
|
int unix_connect_opts(QemuOpts *opts)
|
|
{
|
|
fprintf(stderr, "unix sockets are not available on windows\n");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
|
|
int unix_listen(const char *path, char *ostr, int olen)
|
|
{
|
|
fprintf(stderr, "unix sockets are not available on windows\n");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
|
|
int unix_connect(const char *path)
|
|
{
|
|
fprintf(stderr, "unix sockets are not available on windows\n");
|
|
errno = ENOTSUP;
|
|
return -1;
|
|
}
|
|
|
|
#endif
|
|
|
|
#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;
|
|
}
|