root / qemu-sockets.c @ dc1c13d9
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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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|
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#include "qemu_socket.h" |
| 26 |
#include "qemu-common.h" /* for qemu_isdigit */ |
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|
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#ifndef AI_ADDRCONFIG
|
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# define AI_ADDRCONFIG 0 |
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#endif
|
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|
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static const int on=1, off=0; |
| 33 |
|
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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",
|
| 37 |
.head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head), |
| 38 |
.desc = {
|
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{
|
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.name = "path",
|
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.type = QEMU_OPT_STRING, |
| 42 |
},{
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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, |
| 57 |
},{
|
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.name = "block",
|
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.type = QEMU_OPT_BOOL, |
| 60 |
}, |
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{ /* end if list */ }
|
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}, |
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}; |
| 64 |
|
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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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|
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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);
|
| 74 |
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; |
| 79 |
} |
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} |
| 81 |
|
| 82 |
static void inet_setport(struct addrinfo *e, int port) |
| 83 |
{
|
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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); |
| 91 |
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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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"; |
| 105 |
} |
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return "unknown"; |
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} |
| 108 |
|
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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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|
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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; |
| 122 |
|
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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); |
| 127 |
return -1; |
| 128 |
} |
| 129 |
pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port")); |
| 130 |
addr = qemu_opt_get(opts, "host");
|
| 131 |
|
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to = qemu_opt_get_number(opts, "to", 0); |
| 133 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) |
| 134 |
ai.ai_family = PF_INET; |
| 135 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) |
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ai.ai_family = PF_INET6; |
| 137 |
|
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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);
|
| 142 |
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); |
| 146 |
return -1; |
| 147 |
} |
| 148 |
|
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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); |
| 155 |
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)); |
| 158 |
if (!e->ai_next) {
|
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error_set(errp, QERR_SOCKET_CREATE_FAILED); |
| 160 |
} |
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continue;
|
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} |
| 163 |
|
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setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on)); |
| 165 |
#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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|
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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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|
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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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|
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int inet_connect_opts(QemuOpts *opts, bool *in_progress, Error **errp) |
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{
|
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struct addrinfo ai,*res,*e;
|
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const char *addr; |
| 216 |
const char *port; |
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char uaddr[INET6_ADDRSTRLEN+1]; |
| 218 |
char uport[33]; |
| 219 |
int sock,rc;
|
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bool block;
|
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|
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memset(&ai,0, sizeof(ai)); |
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ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
| 224 |
ai.ai_family = PF_UNSPEC; |
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ai.ai_socktype = SOCK_STREAM; |
| 226 |
|
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if (in_progress) {
|
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*in_progress = false;
|
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} |
| 230 |
|
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addr = qemu_opt_get(opts, "host");
|
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port = qemu_opt_get(opts, "port");
|
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block = qemu_opt_get_bool(opts, "block", 0); |
| 234 |
if (addr == NULL || port == NULL) { |
| 235 |
fprintf(stderr, "inet_connect: host and/or port not specified\n");
|
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error_set(errp, QERR_SOCKET_CREATE_FAILED); |
| 237 |
return -1; |
| 238 |
} |
| 239 |
|
| 240 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) |
| 241 |
ai.ai_family = PF_INET; |
| 242 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) |
| 243 |
ai.ai_family = PF_INET6; |
| 244 |
|
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/* lookup */
|
| 246 |
if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) { |
| 247 |
fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
|
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gai_strerror(rc)); |
| 249 |
error_set(errp, QERR_SOCKET_CREATE_FAILED); |
| 250 |
return -1; |
| 251 |
} |
| 252 |
|
| 253 |
for (e = res; e != NULL; e = e->ai_next) { |
| 254 |
if (getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen, |
| 255 |
uaddr,INET6_ADDRSTRLEN,uport,32,
|
| 256 |
NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
|
| 257 |
fprintf(stderr,"%s: getnameinfo: oops\n", __FUNCTION__);
|
| 258 |
continue;
|
| 259 |
} |
| 260 |
sock = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol); |
| 261 |
if (sock < 0) { |
| 262 |
fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
|
| 263 |
inet_strfamily(e->ai_family), strerror(errno)); |
| 264 |
continue;
|
| 265 |
} |
| 266 |
setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on)); |
| 267 |
if (!block) {
|
| 268 |
socket_set_nonblock(sock); |
| 269 |
} |
| 270 |
/* connect to peer */
|
| 271 |
do {
|
| 272 |
rc = 0;
|
| 273 |
if (connect(sock, e->ai_addr, e->ai_addrlen) < 0) { |
| 274 |
rc = -socket_error(); |
| 275 |
} |
| 276 |
} while (rc == -EINTR);
|
| 277 |
|
| 278 |
#ifdef _WIN32
|
| 279 |
if (!block && (rc == -EINPROGRESS || rc == -EWOULDBLOCK
|
| 280 |
|| rc == -WSAEALREADY)) {
|
| 281 |
#else
|
| 282 |
if (!block && (rc == -EINPROGRESS)) {
|
| 283 |
#endif
|
| 284 |
if (in_progress) {
|
| 285 |
*in_progress = true;
|
| 286 |
} |
| 287 |
} else if (rc < 0) { |
| 288 |
if (NULL == e->ai_next) |
| 289 |
fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
|
| 290 |
inet_strfamily(e->ai_family), |
| 291 |
e->ai_canonname, uaddr, uport, strerror(errno)); |
| 292 |
closesocket(sock); |
| 293 |
continue;
|
| 294 |
} |
| 295 |
freeaddrinfo(res); |
| 296 |
return sock;
|
| 297 |
} |
| 298 |
error_set(errp, QERR_SOCKET_CONNECT_FAILED); |
| 299 |
freeaddrinfo(res); |
| 300 |
return -1; |
| 301 |
} |
| 302 |
|
| 303 |
int inet_dgram_opts(QemuOpts *opts)
|
| 304 |
{
|
| 305 |
struct addrinfo ai, *peer = NULL, *local = NULL; |
| 306 |
const char *addr; |
| 307 |
const char *port; |
| 308 |
char uaddr[INET6_ADDRSTRLEN+1]; |
| 309 |
char uport[33]; |
| 310 |
int sock = -1, rc; |
| 311 |
|
| 312 |
/* lookup peer addr */
|
| 313 |
memset(&ai,0, sizeof(ai)); |
| 314 |
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
| 315 |
ai.ai_family = PF_UNSPEC; |
| 316 |
ai.ai_socktype = SOCK_DGRAM; |
| 317 |
|
| 318 |
addr = qemu_opt_get(opts, "host");
|
| 319 |
port = qemu_opt_get(opts, "port");
|
| 320 |
if (addr == NULL || strlen(addr) == 0) { |
| 321 |
addr = "localhost";
|
| 322 |
} |
| 323 |
if (port == NULL || strlen(port) == 0) { |
| 324 |
fprintf(stderr, "inet_dgram: port not specified\n");
|
| 325 |
return -1; |
| 326 |
} |
| 327 |
|
| 328 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) |
| 329 |
ai.ai_family = PF_INET; |
| 330 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) |
| 331 |
ai.ai_family = PF_INET6; |
| 332 |
|
| 333 |
if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) { |
| 334 |
fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
|
| 335 |
gai_strerror(rc)); |
| 336 |
return -1; |
| 337 |
} |
| 338 |
|
| 339 |
/* lookup local addr */
|
| 340 |
memset(&ai,0, sizeof(ai)); |
| 341 |
ai.ai_flags = AI_PASSIVE; |
| 342 |
ai.ai_family = peer->ai_family; |
| 343 |
ai.ai_socktype = SOCK_DGRAM; |
| 344 |
|
| 345 |
addr = qemu_opt_get(opts, "localaddr");
|
| 346 |
port = qemu_opt_get(opts, "localport");
|
| 347 |
if (addr == NULL || strlen(addr) == 0) { |
| 348 |
addr = NULL;
|
| 349 |
} |
| 350 |
if (!port || strlen(port) == 0) |
| 351 |
port = "0";
|
| 352 |
|
| 353 |
if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) { |
| 354 |
fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
|
| 355 |
gai_strerror(rc)); |
| 356 |
return -1; |
| 357 |
} |
| 358 |
|
| 359 |
/* create socket */
|
| 360 |
sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol); |
| 361 |
if (sock < 0) { |
| 362 |
fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
|
| 363 |
inet_strfamily(peer->ai_family), strerror(errno)); |
| 364 |
goto err;
|
| 365 |
} |
| 366 |
setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on)); |
| 367 |
|
| 368 |
/* bind socket */
|
| 369 |
if (getnameinfo((struct sockaddr*)local->ai_addr,local->ai_addrlen, |
| 370 |
uaddr,INET6_ADDRSTRLEN,uport,32,
|
| 371 |
NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
|
| 372 |
fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
|
| 373 |
goto err;
|
| 374 |
} |
| 375 |
if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) { |
| 376 |
fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
|
| 377 |
inet_strfamily(local->ai_family), uaddr, inet_getport(local)); |
| 378 |
goto err;
|
| 379 |
} |
| 380 |
|
| 381 |
/* connect to peer */
|
| 382 |
if (getnameinfo((struct sockaddr*)peer->ai_addr, peer->ai_addrlen, |
| 383 |
uaddr, INET6_ADDRSTRLEN, uport, 32,
|
| 384 |
NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
|
| 385 |
fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
|
| 386 |
goto err;
|
| 387 |
} |
| 388 |
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) { |
| 389 |
fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
|
| 390 |
inet_strfamily(peer->ai_family), |
| 391 |
peer->ai_canonname, uaddr, uport, strerror(errno)); |
| 392 |
goto err;
|
| 393 |
} |
| 394 |
|
| 395 |
freeaddrinfo(local); |
| 396 |
freeaddrinfo(peer); |
| 397 |
return sock;
|
| 398 |
|
| 399 |
err:
|
| 400 |
if (-1 != sock) |
| 401 |
closesocket(sock); |
| 402 |
if (local)
|
| 403 |
freeaddrinfo(local); |
| 404 |
if (peer)
|
| 405 |
freeaddrinfo(peer); |
| 406 |
return -1; |
| 407 |
} |
| 408 |
|
| 409 |
/* compatibility wrapper */
|
| 410 |
static int inet_parse(QemuOpts *opts, const char *str) |
| 411 |
{
|
| 412 |
const char *optstr, *h; |
| 413 |
char addr[64]; |
| 414 |
char port[33]; |
| 415 |
int pos;
|
| 416 |
|
| 417 |
/* parse address */
|
| 418 |
if (str[0] == ':') { |
| 419 |
/* no host given */
|
| 420 |
addr[0] = '\0'; |
| 421 |
if (1 != sscanf(str,":%32[^,]%n",port,&pos)) { |
| 422 |
fprintf(stderr, "%s: portonly parse error (%s)\n",
|
| 423 |
__FUNCTION__, str); |
| 424 |
return -1; |
| 425 |
} |
| 426 |
} else if (str[0] == '[') { |
| 427 |
/* IPv6 addr */
|
| 428 |
if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) { |
| 429 |
fprintf(stderr, "%s: ipv6 parse error (%s)\n",
|
| 430 |
__FUNCTION__, str); |
| 431 |
return -1; |
| 432 |
} |
| 433 |
qemu_opt_set(opts, "ipv6", "on"); |
| 434 |
} else if (qemu_isdigit(str[0])) { |
| 435 |
/* IPv4 addr */
|
| 436 |
if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) { |
| 437 |
fprintf(stderr, "%s: ipv4 parse error (%s)\n",
|
| 438 |
__FUNCTION__, str); |
| 439 |
return -1; |
| 440 |
} |
| 441 |
qemu_opt_set(opts, "ipv4", "on"); |
| 442 |
} else {
|
| 443 |
/* hostname */
|
| 444 |
if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) { |
| 445 |
fprintf(stderr, "%s: hostname parse error (%s)\n",
|
| 446 |
__FUNCTION__, str); |
| 447 |
return -1; |
| 448 |
} |
| 449 |
} |
| 450 |
qemu_opt_set(opts, "host", addr);
|
| 451 |
qemu_opt_set(opts, "port", port);
|
| 452 |
|
| 453 |
/* parse options */
|
| 454 |
optstr = str + pos; |
| 455 |
h = strstr(optstr, ",to=");
|
| 456 |
if (h)
|
| 457 |
qemu_opt_set(opts, "to", h+4); |
| 458 |
if (strstr(optstr, ",ipv4")) |
| 459 |
qemu_opt_set(opts, "ipv4", "on"); |
| 460 |
if (strstr(optstr, ",ipv6")) |
| 461 |
qemu_opt_set(opts, "ipv6", "on"); |
| 462 |
return 0; |
| 463 |
} |
| 464 |
|
| 465 |
int inet_listen(const char *str, char *ostr, int olen, |
| 466 |
int socktype, int port_offset, Error **errp) |
| 467 |
{
|
| 468 |
QemuOpts *opts; |
| 469 |
char *optstr;
|
| 470 |
int sock = -1; |
| 471 |
|
| 472 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 473 |
if (inet_parse(opts, str) == 0) { |
| 474 |
sock = inet_listen_opts(opts, port_offset, errp); |
| 475 |
if (sock != -1 && ostr) { |
| 476 |
optstr = strchr(str, ',');
|
| 477 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) { |
| 478 |
snprintf(ostr, olen, "[%s]:%s%s",
|
| 479 |
qemu_opt_get(opts, "host"),
|
| 480 |
qemu_opt_get(opts, "port"),
|
| 481 |
optstr ? optstr : "");
|
| 482 |
} else {
|
| 483 |
snprintf(ostr, olen, "%s:%s%s",
|
| 484 |
qemu_opt_get(opts, "host"),
|
| 485 |
qemu_opt_get(opts, "port"),
|
| 486 |
optstr ? optstr : "");
|
| 487 |
} |
| 488 |
} |
| 489 |
} else {
|
| 490 |
error_set(errp, QERR_SOCKET_CREATE_FAILED); |
| 491 |
} |
| 492 |
qemu_opts_del(opts); |
| 493 |
return sock;
|
| 494 |
} |
| 495 |
|
| 496 |
int inet_connect(const char *str, bool block, bool *in_progress, Error **errp) |
| 497 |
{
|
| 498 |
QemuOpts *opts; |
| 499 |
int sock = -1; |
| 500 |
|
| 501 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 502 |
if (inet_parse(opts, str) == 0) { |
| 503 |
if (block) {
|
| 504 |
qemu_opt_set(opts, "block", "on"); |
| 505 |
} |
| 506 |
sock = inet_connect_opts(opts, in_progress, errp); |
| 507 |
} else {
|
| 508 |
error_set(errp, QERR_SOCKET_CREATE_FAILED); |
| 509 |
} |
| 510 |
qemu_opts_del(opts); |
| 511 |
return sock;
|
| 512 |
} |
| 513 |
|
| 514 |
#ifndef _WIN32
|
| 515 |
|
| 516 |
int unix_listen_opts(QemuOpts *opts)
|
| 517 |
{
|
| 518 |
struct sockaddr_un un;
|
| 519 |
const char *path = qemu_opt_get(opts, "path"); |
| 520 |
int sock, fd;
|
| 521 |
|
| 522 |
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
| 523 |
if (sock < 0) { |
| 524 |
perror("socket(unix)");
|
| 525 |
return -1; |
| 526 |
} |
| 527 |
|
| 528 |
memset(&un, 0, sizeof(un)); |
| 529 |
un.sun_family = AF_UNIX; |
| 530 |
if (path && strlen(path)) {
|
| 531 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); |
| 532 |
} else {
|
| 533 |
char *tmpdir = getenv("TMPDIR"); |
| 534 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX", |
| 535 |
tmpdir ? tmpdir : "/tmp");
|
| 536 |
/*
|
| 537 |
* This dummy fd usage silences the mktemp() unsecure warning.
|
| 538 |
* Using mkstemp() doesn't make things more secure here
|
| 539 |
* though. bind() complains about existing files, so we have
|
| 540 |
* to unlink first and thus re-open the race window. The
|
| 541 |
* worst case possible is bind() failing, i.e. a DoS attack.
|
| 542 |
*/
|
| 543 |
fd = mkstemp(un.sun_path); close(fd); |
| 544 |
qemu_opt_set(opts, "path", un.sun_path);
|
| 545 |
} |
| 546 |
|
| 547 |
unlink(un.sun_path); |
| 548 |
if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) { |
| 549 |
fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
|
| 550 |
goto err;
|
| 551 |
} |
| 552 |
if (listen(sock, 1) < 0) { |
| 553 |
fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
|
| 554 |
goto err;
|
| 555 |
} |
| 556 |
|
| 557 |
return sock;
|
| 558 |
|
| 559 |
err:
|
| 560 |
closesocket(sock); |
| 561 |
return -1; |
| 562 |
} |
| 563 |
|
| 564 |
int unix_connect_opts(QemuOpts *opts)
|
| 565 |
{
|
| 566 |
struct sockaddr_un un;
|
| 567 |
const char *path = qemu_opt_get(opts, "path"); |
| 568 |
int sock;
|
| 569 |
|
| 570 |
if (NULL == path) { |
| 571 |
fprintf(stderr, "unix connect: no path specified\n");
|
| 572 |
return -1; |
| 573 |
} |
| 574 |
|
| 575 |
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
| 576 |
if (sock < 0) { |
| 577 |
perror("socket(unix)");
|
| 578 |
return -1; |
| 579 |
} |
| 580 |
|
| 581 |
memset(&un, 0, sizeof(un)); |
| 582 |
un.sun_family = AF_UNIX; |
| 583 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); |
| 584 |
if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) { |
| 585 |
fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
|
| 586 |
close(sock); |
| 587 |
return -1; |
| 588 |
} |
| 589 |
|
| 590 |
return sock;
|
| 591 |
} |
| 592 |
|
| 593 |
/* compatibility wrapper */
|
| 594 |
int unix_listen(const char *str, char *ostr, int olen) |
| 595 |
{
|
| 596 |
QemuOpts *opts; |
| 597 |
char *path, *optstr;
|
| 598 |
int sock, len;
|
| 599 |
|
| 600 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 601 |
|
| 602 |
optstr = strchr(str, ',');
|
| 603 |
if (optstr) {
|
| 604 |
len = optstr - str; |
| 605 |
if (len) {
|
| 606 |
path = g_malloc(len+1);
|
| 607 |
snprintf(path, len+1, "%.*s", len, str); |
| 608 |
qemu_opt_set(opts, "path", path);
|
| 609 |
g_free(path); |
| 610 |
} |
| 611 |
} else {
|
| 612 |
qemu_opt_set(opts, "path", str);
|
| 613 |
} |
| 614 |
|
| 615 |
sock = unix_listen_opts(opts); |
| 616 |
|
| 617 |
if (sock != -1 && ostr) |
| 618 |
snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : ""); |
| 619 |
qemu_opts_del(opts); |
| 620 |
return sock;
|
| 621 |
} |
| 622 |
|
| 623 |
int unix_connect(const char *path) |
| 624 |
{
|
| 625 |
QemuOpts *opts; |
| 626 |
int sock;
|
| 627 |
|
| 628 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 629 |
qemu_opt_set(opts, "path", path);
|
| 630 |
sock = unix_connect_opts(opts); |
| 631 |
qemu_opts_del(opts); |
| 632 |
return sock;
|
| 633 |
} |
| 634 |
|
| 635 |
#else
|
| 636 |
|
| 637 |
int unix_listen_opts(QemuOpts *opts)
|
| 638 |
{
|
| 639 |
fprintf(stderr, "unix sockets are not available on windows\n");
|
| 640 |
errno = ENOTSUP; |
| 641 |
return -1; |
| 642 |
} |
| 643 |
|
| 644 |
int unix_connect_opts(QemuOpts *opts)
|
| 645 |
{
|
| 646 |
fprintf(stderr, "unix sockets are not available on windows\n");
|
| 647 |
errno = ENOTSUP; |
| 648 |
return -1; |
| 649 |
} |
| 650 |
|
| 651 |
int unix_listen(const char *path, char *ostr, int olen) |
| 652 |
{
|
| 653 |
fprintf(stderr, "unix sockets are not available on windows\n");
|
| 654 |
errno = ENOTSUP; |
| 655 |
return -1; |
| 656 |
} |
| 657 |
|
| 658 |
int unix_connect(const char *path) |
| 659 |
{
|
| 660 |
fprintf(stderr, "unix sockets are not available on windows\n");
|
| 661 |
errno = ENOTSUP; |
| 662 |
return -1; |
| 663 |
} |
| 664 |
|
| 665 |
#endif
|
| 666 |
|
| 667 |
#ifdef _WIN32
|
| 668 |
static void socket_cleanup(void) |
| 669 |
{
|
| 670 |
WSACleanup(); |
| 671 |
} |
| 672 |
#endif
|
| 673 |
|
| 674 |
int socket_init(void) |
| 675 |
{
|
| 676 |
#ifdef _WIN32
|
| 677 |
WSADATA Data; |
| 678 |
int ret, err;
|
| 679 |
|
| 680 |
ret = WSAStartup(MAKEWORD(2,2), &Data); |
| 681 |
if (ret != 0) { |
| 682 |
err = WSAGetLastError(); |
| 683 |
fprintf(stderr, "WSAStartup: %d\n", err);
|
| 684 |
return -1; |
| 685 |
} |
| 686 |
atexit(socket_cleanup); |
| 687 |
#endif
|
| 688 |
return 0; |
| 689 |
} |