root / qemu-sockets.c @ 879e45c7
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| 1 |
/*
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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> |
| 21 |
#include <ctype.h> |
| 22 |
#include <errno.h> |
| 23 |
#include <unistd.h> |
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|
| 25 |
#include "qemu_socket.h" |
| 26 |
#include "qemu-common.h" /* for qemu_isdigit */ |
| 27 |
#include "main-loop.h" |
| 28 |
|
| 29 |
#ifndef AI_ADDRCONFIG
|
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# define AI_ADDRCONFIG 0 |
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#endif
|
| 32 |
|
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static const int on=1, off=0; |
| 34 |
|
| 35 |
/* used temporarely until all users are converted to QemuOpts */
|
| 36 |
static QemuOptsList dummy_opts = {
|
| 37 |
.name = "dummy",
|
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.head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head), |
| 39 |
.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, |
| 46 |
},{
|
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.name = "port",
|
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.type = QEMU_OPT_STRING, |
| 49 |
},{
|
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.name = "to",
|
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.type = QEMU_OPT_NUMBER, |
| 52 |
},{
|
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.name = "ipv4",
|
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.type = QEMU_OPT_BOOL, |
| 55 |
},{
|
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.name = "ipv6",
|
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.type = QEMU_OPT_BOOL, |
| 58 |
}, |
| 59 |
{ /* end if list */ }
|
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}, |
| 61 |
}; |
| 62 |
|
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static int inet_getport(struct addrinfo *e) |
| 64 |
{
|
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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:
|
| 70 |
i6 = (void*)e->ai_addr;
|
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return ntohs(i6->sin6_port);
|
| 72 |
case PF_INET:
|
| 73 |
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; |
| 77 |
} |
| 78 |
} |
| 79 |
|
| 80 |
static void inet_setport(struct addrinfo *e, int port) |
| 81 |
{
|
| 82 |
struct sockaddr_in *i4;
|
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struct sockaddr_in6 *i6;
|
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|
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switch (e->ai_family) {
|
| 86 |
case PF_INET6:
|
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i6 = (void*)e->ai_addr;
|
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i6->sin6_port = htons(port); |
| 89 |
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"; |
| 102 |
case PF_UNIX: return "unix"; |
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} |
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return "unknown"; |
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} |
| 106 |
|
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int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp) |
| 108 |
{
|
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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; |
| 120 |
|
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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; |
| 125 |
} |
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pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port")); |
| 127 |
addr = qemu_opt_get(opts, "host");
|
| 128 |
|
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to = qemu_opt_get_number(opts, "to", 0); |
| 130 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) |
| 131 |
ai.ai_family = PF_INET; |
| 132 |
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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if (port_offset)
|
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snprintf(port, sizeof(port), "%d", atoi(port) + port_offset); |
| 138 |
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)); |
| 142 |
return -1; |
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} |
| 144 |
|
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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); |
| 151 |
if (slisten < 0) { |
| 152 |
if (!e->ai_next) {
|
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error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
| 154 |
} |
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continue;
|
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} |
| 157 |
|
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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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|
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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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} |
| 174 |
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); |
| 177 |
} |
| 178 |
} |
| 179 |
} |
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closesocket(slisten); |
| 181 |
} |
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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_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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|
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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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|
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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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|
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static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, |
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ConnectState *connect_state, Error **errp); |
| 220 |
|
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static void wait_for_connect(void *opaque) |
| 222 |
{
|
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ConnectState *s = opaque; |
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int val = 0, rc = 0; |
| 225 |
socklen_t valsize = sizeof(val);
|
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bool in_progress;
|
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|
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qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
| 229 |
|
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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); |
| 233 |
|
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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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} |
| 238 |
|
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/* connect error */
|
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if (rc < 0) { |
| 241 |
closesocket(s->fd); |
| 242 |
s->fd = rc; |
| 243 |
} |
| 244 |
|
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/* try to connect to the next address on the list */
|
| 246 |
if (s->current_addr) {
|
| 247 |
while (s->current_addr->ai_next != NULL && s->fd < 0) { |
| 248 |
s->current_addr = s->current_addr->ai_next; |
| 249 |
s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL);
|
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/* connect in progress */
|
| 251 |
if (in_progress) {
|
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return;
|
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} |
| 254 |
} |
| 255 |
|
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freeaddrinfo(s->addr_list); |
| 257 |
} |
| 258 |
|
| 259 |
if (s->callback) {
|
| 260 |
s->callback(s->fd, s->opaque); |
| 261 |
} |
| 262 |
g_free(s); |
| 263 |
} |
| 264 |
|
| 265 |
static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, |
| 266 |
ConnectState *connect_state, Error **errp) |
| 267 |
{
|
| 268 |
int sock, rc;
|
| 269 |
|
| 270 |
*in_progress = false;
|
| 271 |
|
| 272 |
sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); |
| 273 |
if (sock < 0) { |
| 274 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
| 275 |
return -1; |
| 276 |
} |
| 277 |
qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
|
| 278 |
if (connect_state != NULL) { |
| 279 |
socket_set_nonblock(sock); |
| 280 |
} |
| 281 |
/* connect to peer */
|
| 282 |
do {
|
| 283 |
rc = 0;
|
| 284 |
if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) { |
| 285 |
rc = -socket_error(); |
| 286 |
} |
| 287 |
} while (rc == -EINTR);
|
| 288 |
|
| 289 |
if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { |
| 290 |
connect_state->fd = sock; |
| 291 |
qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect, |
| 292 |
connect_state); |
| 293 |
*in_progress = true;
|
| 294 |
} else if (rc < 0) { |
| 295 |
error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED); |
| 296 |
closesocket(sock); |
| 297 |
return -1; |
| 298 |
} |
| 299 |
return sock;
|
| 300 |
} |
| 301 |
|
| 302 |
static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp) |
| 303 |
{
|
| 304 |
struct addrinfo ai, *res;
|
| 305 |
int rc;
|
| 306 |
const char *addr; |
| 307 |
const char *port; |
| 308 |
|
| 309 |
memset(&ai, 0, sizeof(ai)); |
| 310 |
|
| 311 |
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
| 312 |
ai.ai_family = PF_UNSPEC; |
| 313 |
ai.ai_socktype = SOCK_STREAM; |
| 314 |
|
| 315 |
addr = qemu_opt_get(opts, "host");
|
| 316 |
port = qemu_opt_get(opts, "port");
|
| 317 |
if (addr == NULL || port == NULL) { |
| 318 |
error_setg(errp, "host and/or port not specified");
|
| 319 |
return NULL; |
| 320 |
} |
| 321 |
|
| 322 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) { |
| 323 |
ai.ai_family = PF_INET; |
| 324 |
} |
| 325 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) { |
| 326 |
ai.ai_family = PF_INET6; |
| 327 |
} |
| 328 |
|
| 329 |
/* lookup */
|
| 330 |
rc = getaddrinfo(addr, port, &ai, &res); |
| 331 |
if (rc != 0) { |
| 332 |
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
| 333 |
gai_strerror(rc)); |
| 334 |
return NULL; |
| 335 |
} |
| 336 |
return res;
|
| 337 |
} |
| 338 |
|
| 339 |
/**
|
| 340 |
* Create a socket and connect it to an address.
|
| 341 |
*
|
| 342 |
* @opts: QEMU options, recognized parameters strings "host" and "port",
|
| 343 |
* bools "ipv4" and "ipv6".
|
| 344 |
* @errp: set on error
|
| 345 |
* @callback: callback function for non-blocking connect
|
| 346 |
* @opaque: opaque for callback function
|
| 347 |
*
|
| 348 |
* Returns: -1 on error, file descriptor on success.
|
| 349 |
*
|
| 350 |
* If @callback is non-null, the connect is non-blocking. If this
|
| 351 |
* function succeeds, callback will be called when the connection
|
| 352 |
* completes, with the file descriptor on success, or -1 on error.
|
| 353 |
*/
|
| 354 |
int inet_connect_opts(QemuOpts *opts, Error **errp,
|
| 355 |
NonBlockingConnectHandler *callback, void *opaque)
|
| 356 |
{
|
| 357 |
struct addrinfo *res, *e;
|
| 358 |
int sock = -1; |
| 359 |
bool in_progress;
|
| 360 |
ConnectState *connect_state = NULL;
|
| 361 |
|
| 362 |
res = inet_parse_connect_opts(opts, errp); |
| 363 |
if (!res) {
|
| 364 |
return -1; |
| 365 |
} |
| 366 |
|
| 367 |
if (callback != NULL) { |
| 368 |
connect_state = g_malloc0(sizeof(*connect_state));
|
| 369 |
connect_state->addr_list = res; |
| 370 |
connect_state->callback = callback; |
| 371 |
connect_state->opaque = opaque; |
| 372 |
} |
| 373 |
|
| 374 |
for (e = res; e != NULL; e = e->ai_next) { |
| 375 |
if (connect_state != NULL) { |
| 376 |
connect_state->current_addr = e; |
| 377 |
} |
| 378 |
sock = inet_connect_addr(e, &in_progress, connect_state, errp); |
| 379 |
if (in_progress) {
|
| 380 |
return sock;
|
| 381 |
} else if (sock >= 0) { |
| 382 |
/* non blocking socket immediate success, call callback */
|
| 383 |
if (callback != NULL) { |
| 384 |
callback(sock, opaque); |
| 385 |
} |
| 386 |
break;
|
| 387 |
} |
| 388 |
} |
| 389 |
g_free(connect_state); |
| 390 |
freeaddrinfo(res); |
| 391 |
return sock;
|
| 392 |
} |
| 393 |
|
| 394 |
int inet_dgram_opts(QemuOpts *opts, Error **errp)
|
| 395 |
{
|
| 396 |
struct addrinfo ai, *peer = NULL, *local = NULL; |
| 397 |
const char *addr; |
| 398 |
const char *port; |
| 399 |
int sock = -1, rc; |
| 400 |
|
| 401 |
/* lookup peer addr */
|
| 402 |
memset(&ai,0, sizeof(ai)); |
| 403 |
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
| 404 |
ai.ai_family = PF_UNSPEC; |
| 405 |
ai.ai_socktype = SOCK_DGRAM; |
| 406 |
|
| 407 |
addr = qemu_opt_get(opts, "host");
|
| 408 |
port = qemu_opt_get(opts, "port");
|
| 409 |
if (addr == NULL || strlen(addr) == 0) { |
| 410 |
addr = "localhost";
|
| 411 |
} |
| 412 |
if (port == NULL || strlen(port) == 0) { |
| 413 |
error_setg(errp, "remote port not specified");
|
| 414 |
return -1; |
| 415 |
} |
| 416 |
|
| 417 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) |
| 418 |
ai.ai_family = PF_INET; |
| 419 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) |
| 420 |
ai.ai_family = PF_INET6; |
| 421 |
|
| 422 |
if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) { |
| 423 |
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
| 424 |
gai_strerror(rc)); |
| 425 |
return -1; |
| 426 |
} |
| 427 |
|
| 428 |
/* lookup local addr */
|
| 429 |
memset(&ai,0, sizeof(ai)); |
| 430 |
ai.ai_flags = AI_PASSIVE; |
| 431 |
ai.ai_family = peer->ai_family; |
| 432 |
ai.ai_socktype = SOCK_DGRAM; |
| 433 |
|
| 434 |
addr = qemu_opt_get(opts, "localaddr");
|
| 435 |
port = qemu_opt_get(opts, "localport");
|
| 436 |
if (addr == NULL || strlen(addr) == 0) { |
| 437 |
addr = NULL;
|
| 438 |
} |
| 439 |
if (!port || strlen(port) == 0) |
| 440 |
port = "0";
|
| 441 |
|
| 442 |
if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) { |
| 443 |
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
| 444 |
gai_strerror(rc)); |
| 445 |
goto err;
|
| 446 |
} |
| 447 |
|
| 448 |
/* create socket */
|
| 449 |
sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol); |
| 450 |
if (sock < 0) { |
| 451 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
| 452 |
goto err;
|
| 453 |
} |
| 454 |
setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on)); |
| 455 |
|
| 456 |
/* bind socket */
|
| 457 |
if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) { |
| 458 |
error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
| 459 |
goto err;
|
| 460 |
} |
| 461 |
|
| 462 |
/* connect to peer */
|
| 463 |
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) { |
| 464 |
error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED); |
| 465 |
goto err;
|
| 466 |
} |
| 467 |
|
| 468 |
freeaddrinfo(local); |
| 469 |
freeaddrinfo(peer); |
| 470 |
return sock;
|
| 471 |
|
| 472 |
err:
|
| 473 |
if (-1 != sock) |
| 474 |
closesocket(sock); |
| 475 |
if (local)
|
| 476 |
freeaddrinfo(local); |
| 477 |
if (peer)
|
| 478 |
freeaddrinfo(peer); |
| 479 |
return -1; |
| 480 |
} |
| 481 |
|
| 482 |
/* compatibility wrapper */
|
| 483 |
static InetSocketAddress *inet_parse(const char *str, Error **errp) |
| 484 |
{
|
| 485 |
InetSocketAddress *addr; |
| 486 |
const char *optstr, *h; |
| 487 |
char host[64]; |
| 488 |
char port[33]; |
| 489 |
int to;
|
| 490 |
int pos;
|
| 491 |
|
| 492 |
addr = g_new0(InetSocketAddress, 1);
|
| 493 |
|
| 494 |
/* parse address */
|
| 495 |
if (str[0] == ':') { |
| 496 |
/* no host given */
|
| 497 |
host[0] = '\0'; |
| 498 |
if (1 != sscanf(str, ":%32[^,]%n", port, &pos)) { |
| 499 |
error_setg(errp, "error parsing port in address '%s'", str);
|
| 500 |
goto fail;
|
| 501 |
} |
| 502 |
} else if (str[0] == '[') { |
| 503 |
/* IPv6 addr */
|
| 504 |
if (2 != sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos)) { |
| 505 |
error_setg(errp, "error parsing IPv6 address '%s'", str);
|
| 506 |
goto fail;
|
| 507 |
} |
| 508 |
addr->ipv6 = addr->has_ipv6 = true;
|
| 509 |
} else if (qemu_isdigit(str[0])) { |
| 510 |
/* IPv4 addr */
|
| 511 |
if (2 != sscanf(str, "%64[0-9.]:%32[^,]%n", host, port, &pos)) { |
| 512 |
error_setg(errp, "error parsing IPv4 address '%s'", str);
|
| 513 |
goto fail;
|
| 514 |
} |
| 515 |
addr->ipv4 = addr->has_ipv4 = true;
|
| 516 |
} else {
|
| 517 |
/* hostname */
|
| 518 |
if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) { |
| 519 |
error_setg(errp, "error parsing address '%s'", str);
|
| 520 |
goto fail;
|
| 521 |
} |
| 522 |
} |
| 523 |
|
| 524 |
addr->host = g_strdup(host); |
| 525 |
addr->port = g_strdup(port); |
| 526 |
|
| 527 |
/* parse options */
|
| 528 |
optstr = str + pos; |
| 529 |
h = strstr(optstr, ",to=");
|
| 530 |
if (h) {
|
| 531 |
if (1 != sscanf(str, "%d%n", &to, &pos) || |
| 532 |
(str[pos] != '\0' && str[pos] != ',')) { |
| 533 |
error_setg(errp, "error parsing to= argument");
|
| 534 |
goto fail;
|
| 535 |
} |
| 536 |
addr->has_to = true;
|
| 537 |
addr->to = to; |
| 538 |
} |
| 539 |
if (strstr(optstr, ",ipv4")) { |
| 540 |
addr->ipv4 = addr->has_ipv4 = true;
|
| 541 |
} |
| 542 |
if (strstr(optstr, ",ipv6")) { |
| 543 |
addr->ipv6 = addr->has_ipv6 = true;
|
| 544 |
} |
| 545 |
return addr;
|
| 546 |
|
| 547 |
fail:
|
| 548 |
qapi_free_InetSocketAddress(addr); |
| 549 |
return NULL; |
| 550 |
} |
| 551 |
|
| 552 |
static void inet_addr_to_opts(QemuOpts *opts, InetSocketAddress *addr) |
| 553 |
{
|
| 554 |
bool ipv4 = addr->ipv4 || !addr->has_ipv4;
|
| 555 |
bool ipv6 = addr->ipv6 || !addr->has_ipv6;
|
| 556 |
|
| 557 |
if (!ipv4 || !ipv6) {
|
| 558 |
qemu_opt_set_bool(opts, "ipv4", ipv4);
|
| 559 |
qemu_opt_set_bool(opts, "ipv6", ipv6);
|
| 560 |
} |
| 561 |
if (addr->has_to) {
|
| 562 |
char to[20]; |
| 563 |
snprintf(to, sizeof(to), "%d", addr->to); |
| 564 |
qemu_opt_set(opts, "to", to);
|
| 565 |
} |
| 566 |
qemu_opt_set(opts, "host", addr->host);
|
| 567 |
qemu_opt_set(opts, "port", addr->port);
|
| 568 |
} |
| 569 |
|
| 570 |
int inet_listen(const char *str, char *ostr, int olen, |
| 571 |
int socktype, int port_offset, Error **errp) |
| 572 |
{
|
| 573 |
QemuOpts *opts; |
| 574 |
char *optstr;
|
| 575 |
int sock = -1; |
| 576 |
InetSocketAddress *addr; |
| 577 |
|
| 578 |
addr = inet_parse(str, errp); |
| 579 |
if (addr != NULL) { |
| 580 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 581 |
inet_addr_to_opts(opts, addr); |
| 582 |
qapi_free_InetSocketAddress(addr); |
| 583 |
sock = inet_listen_opts(opts, port_offset, errp); |
| 584 |
if (sock != -1 && ostr) { |
| 585 |
optstr = strchr(str, ',');
|
| 586 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) { |
| 587 |
snprintf(ostr, olen, "[%s]:%s%s",
|
| 588 |
qemu_opt_get(opts, "host"),
|
| 589 |
qemu_opt_get(opts, "port"),
|
| 590 |
optstr ? optstr : "");
|
| 591 |
} else {
|
| 592 |
snprintf(ostr, olen, "%s:%s%s",
|
| 593 |
qemu_opt_get(opts, "host"),
|
| 594 |
qemu_opt_get(opts, "port"),
|
| 595 |
optstr ? optstr : "");
|
| 596 |
} |
| 597 |
} |
| 598 |
qemu_opts_del(opts); |
| 599 |
} |
| 600 |
return sock;
|
| 601 |
} |
| 602 |
|
| 603 |
/**
|
| 604 |
* Create a blocking socket and connect it to an address.
|
| 605 |
*
|
| 606 |
* @str: address string
|
| 607 |
* @errp: set in case of an error
|
| 608 |
*
|
| 609 |
* Returns -1 in case of error, file descriptor on success
|
| 610 |
**/
|
| 611 |
int inet_connect(const char *str, Error **errp) |
| 612 |
{
|
| 613 |
QemuOpts *opts; |
| 614 |
int sock = -1; |
| 615 |
InetSocketAddress *addr; |
| 616 |
|
| 617 |
addr = inet_parse(str, errp); |
| 618 |
if (addr != NULL) { |
| 619 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 620 |
inet_addr_to_opts(opts, addr); |
| 621 |
qapi_free_InetSocketAddress(addr); |
| 622 |
sock = inet_connect_opts(opts, errp, NULL, NULL); |
| 623 |
qemu_opts_del(opts); |
| 624 |
} |
| 625 |
return sock;
|
| 626 |
} |
| 627 |
|
| 628 |
/**
|
| 629 |
* Create a non-blocking socket and connect it to an address.
|
| 630 |
* Calls the callback function with fd in case of success or -1 in case of
|
| 631 |
* error.
|
| 632 |
*
|
| 633 |
* @str: address string
|
| 634 |
* @callback: callback function that is called when connect completes,
|
| 635 |
* cannot be NULL.
|
| 636 |
* @opaque: opaque for callback function
|
| 637 |
* @errp: set in case of an error
|
| 638 |
*
|
| 639 |
* Returns: -1 on immediate error, file descriptor on success.
|
| 640 |
**/
|
| 641 |
int inet_nonblocking_connect(const char *str, |
| 642 |
NonBlockingConnectHandler *callback, |
| 643 |
void *opaque, Error **errp)
|
| 644 |
{
|
| 645 |
QemuOpts *opts; |
| 646 |
int sock = -1; |
| 647 |
InetSocketAddress *addr; |
| 648 |
|
| 649 |
g_assert(callback != NULL);
|
| 650 |
|
| 651 |
addr = inet_parse(str, errp); |
| 652 |
if (addr != NULL) { |
| 653 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 654 |
inet_addr_to_opts(opts, addr); |
| 655 |
qapi_free_InetSocketAddress(addr); |
| 656 |
sock = inet_connect_opts(opts, errp, callback, opaque); |
| 657 |
qemu_opts_del(opts); |
| 658 |
} |
| 659 |
return sock;
|
| 660 |
} |
| 661 |
|
| 662 |
#ifndef _WIN32
|
| 663 |
|
| 664 |
int unix_listen_opts(QemuOpts *opts, Error **errp)
|
| 665 |
{
|
| 666 |
struct sockaddr_un un;
|
| 667 |
const char *path = qemu_opt_get(opts, "path"); |
| 668 |
int sock, fd;
|
| 669 |
|
| 670 |
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
| 671 |
if (sock < 0) { |
| 672 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
| 673 |
return -1; |
| 674 |
} |
| 675 |
|
| 676 |
memset(&un, 0, sizeof(un)); |
| 677 |
un.sun_family = AF_UNIX; |
| 678 |
if (path && strlen(path)) {
|
| 679 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); |
| 680 |
} else {
|
| 681 |
char *tmpdir = getenv("TMPDIR"); |
| 682 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX", |
| 683 |
tmpdir ? tmpdir : "/tmp");
|
| 684 |
/*
|
| 685 |
* This dummy fd usage silences the mktemp() unsecure warning.
|
| 686 |
* Using mkstemp() doesn't make things more secure here
|
| 687 |
* though. bind() complains about existing files, so we have
|
| 688 |
* to unlink first and thus re-open the race window. The
|
| 689 |
* worst case possible is bind() failing, i.e. a DoS attack.
|
| 690 |
*/
|
| 691 |
fd = mkstemp(un.sun_path); close(fd); |
| 692 |
qemu_opt_set(opts, "path", un.sun_path);
|
| 693 |
} |
| 694 |
|
| 695 |
unlink(un.sun_path); |
| 696 |
if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) { |
| 697 |
error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
| 698 |
goto err;
|
| 699 |
} |
| 700 |
if (listen(sock, 1) < 0) { |
| 701 |
error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED); |
| 702 |
goto err;
|
| 703 |
} |
| 704 |
|
| 705 |
return sock;
|
| 706 |
|
| 707 |
err:
|
| 708 |
closesocket(sock); |
| 709 |
return -1; |
| 710 |
} |
| 711 |
|
| 712 |
int unix_connect_opts(QemuOpts *opts, Error **errp,
|
| 713 |
NonBlockingConnectHandler *callback, void *opaque)
|
| 714 |
{
|
| 715 |
struct sockaddr_un un;
|
| 716 |
const char *path = qemu_opt_get(opts, "path"); |
| 717 |
ConnectState *connect_state = NULL;
|
| 718 |
int sock, rc;
|
| 719 |
|
| 720 |
if (NULL == path) { |
| 721 |
error_setg(errp, "unix connect: no path specified\n");
|
| 722 |
return -1; |
| 723 |
} |
| 724 |
|
| 725 |
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
| 726 |
if (sock < 0) { |
| 727 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
| 728 |
return -1; |
| 729 |
} |
| 730 |
if (callback != NULL) { |
| 731 |
connect_state = g_malloc0(sizeof(*connect_state));
|
| 732 |
connect_state->callback = callback; |
| 733 |
connect_state->opaque = opaque; |
| 734 |
socket_set_nonblock(sock); |
| 735 |
} |
| 736 |
|
| 737 |
memset(&un, 0, sizeof(un)); |
| 738 |
un.sun_family = AF_UNIX; |
| 739 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); |
| 740 |
|
| 741 |
/* connect to peer */
|
| 742 |
do {
|
| 743 |
rc = 0;
|
| 744 |
if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) { |
| 745 |
rc = -socket_error(); |
| 746 |
} |
| 747 |
} while (rc == -EINTR);
|
| 748 |
|
| 749 |
if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { |
| 750 |
connect_state->fd = sock; |
| 751 |
qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect, |
| 752 |
connect_state); |
| 753 |
return sock;
|
| 754 |
} else if (rc >= 0) { |
| 755 |
/* non blocking socket immediate success, call callback */
|
| 756 |
if (callback != NULL) { |
| 757 |
callback(sock, opaque); |
| 758 |
} |
| 759 |
} |
| 760 |
|
| 761 |
if (rc < 0) { |
| 762 |
error_set_errno(errp, -rc, QERR_SOCKET_CONNECT_FAILED); |
| 763 |
close(sock); |
| 764 |
sock = -1;
|
| 765 |
} |
| 766 |
|
| 767 |
g_free(connect_state); |
| 768 |
return sock;
|
| 769 |
} |
| 770 |
|
| 771 |
#else
|
| 772 |
|
| 773 |
int unix_listen_opts(QemuOpts *opts, Error **errp)
|
| 774 |
{
|
| 775 |
error_setg(errp, "unix sockets are not available on windows");
|
| 776 |
errno = ENOTSUP; |
| 777 |
return -1; |
| 778 |
} |
| 779 |
|
| 780 |
int unix_connect_opts(QemuOpts *opts, Error **errp,
|
| 781 |
NonBlockingConnectHandler *callback, void *opaque)
|
| 782 |
{
|
| 783 |
error_setg(errp, "unix sockets are not available on windows");
|
| 784 |
errno = ENOTSUP; |
| 785 |
return -1; |
| 786 |
} |
| 787 |
#endif
|
| 788 |
|
| 789 |
/* compatibility wrapper */
|
| 790 |
int unix_listen(const char *str, char *ostr, int olen, Error **errp) |
| 791 |
{
|
| 792 |
QemuOpts *opts; |
| 793 |
char *path, *optstr;
|
| 794 |
int sock, len;
|
| 795 |
|
| 796 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 797 |
|
| 798 |
optstr = strchr(str, ',');
|
| 799 |
if (optstr) {
|
| 800 |
len = optstr - str; |
| 801 |
if (len) {
|
| 802 |
path = g_malloc(len+1);
|
| 803 |
snprintf(path, len+1, "%.*s", len, str); |
| 804 |
qemu_opt_set(opts, "path", path);
|
| 805 |
g_free(path); |
| 806 |
} |
| 807 |
} else {
|
| 808 |
qemu_opt_set(opts, "path", str);
|
| 809 |
} |
| 810 |
|
| 811 |
sock = unix_listen_opts(opts, errp); |
| 812 |
|
| 813 |
if (sock != -1 && ostr) |
| 814 |
snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : ""); |
| 815 |
qemu_opts_del(opts); |
| 816 |
return sock;
|
| 817 |
} |
| 818 |
|
| 819 |
int unix_connect(const char *path, Error **errp) |
| 820 |
{
|
| 821 |
QemuOpts *opts; |
| 822 |
int sock;
|
| 823 |
|
| 824 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 825 |
qemu_opt_set(opts, "path", path);
|
| 826 |
sock = unix_connect_opts(opts, errp, NULL, NULL); |
| 827 |
qemu_opts_del(opts); |
| 828 |
return sock;
|
| 829 |
} |
| 830 |
|
| 831 |
|
| 832 |
int unix_nonblocking_connect(const char *path, |
| 833 |
NonBlockingConnectHandler *callback, |
| 834 |
void *opaque, Error **errp)
|
| 835 |
{
|
| 836 |
QemuOpts *opts; |
| 837 |
int sock = -1; |
| 838 |
|
| 839 |
g_assert(callback != NULL);
|
| 840 |
|
| 841 |
opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL); |
| 842 |
qemu_opt_set(opts, "path", path);
|
| 843 |
sock = unix_connect_opts(opts, errp, callback, opaque); |
| 844 |
qemu_opts_del(opts); |
| 845 |
return sock;
|
| 846 |
} |
| 847 |
|
| 848 |
#ifdef _WIN32
|
| 849 |
static void socket_cleanup(void) |
| 850 |
{
|
| 851 |
WSACleanup(); |
| 852 |
} |
| 853 |
#endif
|
| 854 |
|
| 855 |
int socket_init(void) |
| 856 |
{
|
| 857 |
#ifdef _WIN32
|
| 858 |
WSADATA Data; |
| 859 |
int ret, err;
|
| 860 |
|
| 861 |
ret = WSAStartup(MAKEWORD(2,2), &Data); |
| 862 |
if (ret != 0) { |
| 863 |
err = WSAGetLastError(); |
| 864 |
fprintf(stderr, "WSAStartup: %d\n", err);
|
| 865 |
return -1; |
| 866 |
} |
| 867 |
atexit(socket_cleanup); |
| 868 |
#endif
|
| 869 |
return 0; |
| 870 |
} |