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ui: add ability to specify multiple VNC listen addresses 

This change allows the listen address and websocket address
options for -vnc to be repeated. This causes the VNC server
to listen on multiple addresses. e.g.

 $ $QEMU -vnc vnc=localhost:1,vnc=unix:/tmp/vnc,\
              websocket=127.0.0.1:8080,websocket=[::]:8081

results in listening on

127.0.0.1:5901, 127.0.0.1:8080, ::1:5901, :::8081 & /tmp/vnc

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170203120649.15637-9-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Daniel P. Berrange 2017-02-03 12:06:49 +00:00 committed by Gerd Hoffmann
parent e998e2090f
commit 396f935a9a
1 changed files with 134 additions and 63 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

197
ui/vnc.c
View File

@ -3563,6 +3563,10 @@ static int vnc_display_get_address(const char *addrstr,
if (websocket) {
if (g_str_equal(addrstr, "") ||
g_str_equal(addrstr, "on")) {
if (displaynum == -1) {
error_setg(errp, "explicit websocket port is required");
goto cleanup;
}
inet->port = g_strdup_printf(
"%d", displaynum + 5700);
if (to) {
@ -3609,80 +3613,133 @@ static int vnc_display_get_address(const char *addrstr,
}
static int vnc_display_get_addresses(QemuOpts *opts,
SocketAddress **retsaddr,
SocketAddress **retwsaddr,
SocketAddress ***retsaddr,
size_t *retnsaddr,
SocketAddress ***retwsaddr,
size_t *retnwsaddr,
Error **errp)
{
SocketAddress *saddr = NULL;
SocketAddress *wsaddr = NULL;
const char *saddrstr = qemu_opt_get(opts, "vnc");
const char *wsaddrstr = qemu_opt_get(opts, "websocket");
QemuOptsIter addriter;
const char *addr;
int to = qemu_opt_get_number(opts, "to", 0);
bool has_ipv4 = qemu_opt_get(opts, "ipv4");
bool has_ipv6 = qemu_opt_get(opts, "ipv6");
bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false);
bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false);
size_t i;
int displaynum = -1;
int ret = -1;
if (!saddrstr || strcmp(saddrstr, "none") == 0) {
*retsaddr = NULL;
*retwsaddr = NULL;
return 0;
*retsaddr = NULL;
*retnsaddr = 0;
*retwsaddr = NULL;
*retnwsaddr = 0;
addr = qemu_opt_get(opts, "vnc");
if (addr == NULL || g_str_equal(addr, "none")) {
ret = 0;
goto cleanup;
}
if (wsaddrstr &&
if (qemu_opt_get(opts, "websocket") &&
!qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) {
error_setg(errp,
"SHA1 hash support is required for websockets");
goto error;
goto cleanup;
}
int displaynum = vnc_display_get_address(saddrstr, false, 0, to,
has_ipv4, has_ipv6,
ipv4, ipv6,
&saddr, errp);
if (displaynum < 0) {
goto error;
qemu_opt_iter_init(&addriter, opts, "vnc");
while ((addr = qemu_opt_iter_next(&addriter)) != NULL) {
int rv;
rv = vnc_display_get_address(addr, false, 0, to,
has_ipv4, has_ipv6,
ipv4, ipv6,
&saddr, errp);
if (rv < 0) {
goto cleanup;
}
/* Historical compat - first listen address can be used
* to set the default websocket port
*/
if (displaynum == -1) {
displaynum = rv;
}
*retsaddr = g_renew(SocketAddress *, *retsaddr, *retnsaddr + 1);
(*retsaddr)[(*retnsaddr)++] = saddr;
}
if (wsaddrstr) {
if (vnc_display_get_address(wsaddrstr, true, displaynum, to,
/* If we had multiple primary displays, we don't do defaults
* for websocket, and require explicit config instead. */
if (*retnsaddr > 1) {
displaynum = -1;
}
qemu_opt_iter_init(&addriter, opts, "websocket");
while ((addr = qemu_opt_iter_next(&addriter)) != NULL) {
if (vnc_display_get_address(addr, true, displaynum, to,
has_ipv4, has_ipv6,
ipv4, ipv6,
&wsaddr, errp) < 0) {
goto error;
goto cleanup;
}
if (saddr->type == SOCKET_ADDRESS_KIND_INET &&
/* Historical compat - if only a single listen address was
* provided, then this is used to set the default listen
* address for websocket too
*/
if (*retnsaddr == 1 &&
(*retsaddr)[0]->type == SOCKET_ADDRESS_KIND_INET &&
wsaddr->type == SOCKET_ADDRESS_KIND_INET &&
g_str_equal(wsaddr->u.inet.data->host, "") &&
!g_str_equal(saddr->u.inet.data->host, "")) {
!g_str_equal((*retsaddr)[0]->u.inet.data->host, "")) {
g_free(wsaddr->u.inet.data->host);
wsaddr->u.inet.data->host = g_strdup(saddr->u.inet.data->host);
wsaddr->u.inet.data->host =
g_strdup((*retsaddr)[0]->u.inet.data->host);
}
}
*retsaddr = saddr;
*retwsaddr = wsaddr;
return 0;
error:
qapi_free_SocketAddress(saddr);
qapi_free_SocketAddress(wsaddr);
return -1;
*retwsaddr = g_renew(SocketAddress *, *retwsaddr, *retnwsaddr + 1);
(*retwsaddr)[(*retnwsaddr)++] = wsaddr;
}
ret = 0;
cleanup:
if (ret < 0) {
for (i = 0; i < *retnsaddr; i++) {
qapi_free_SocketAddress((*retsaddr)[i]);
}
g_free(*retsaddr);
for (i = 0; i < *retnwsaddr; i++) {
qapi_free_SocketAddress((*retwsaddr)[i]);
}
g_free(*retwsaddr);
*retsaddr = *retwsaddr = NULL;
*retnsaddr = *retnwsaddr = 0;
}
return ret;
}
static int vnc_display_connect(VncDisplay *vd,
SocketAddress *saddr,
SocketAddress *wsaddr,
SocketAddress **saddr,
size_t nsaddr,
SocketAddress **wsaddr,
size_t nwsaddr,
Error **errp)
{
/* connect to viewer */
QIOChannelSocket *sioc = NULL;
if (wsaddr) {
if (nwsaddr != 0) {
error_setg(errp, "Cannot use websockets in reverse mode");
return -1;
}
vd->is_unix = saddr->type == SOCKET_ADDRESS_KIND_UNIX;
if (nsaddr != 1) {
error_setg(errp, "Expected a single address in reverse mode");
return -1;
}
vd->is_unix = saddr[0]->type == SOCKET_ADDRESS_KIND_UNIX;
sioc = qio_channel_socket_new();
qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse");
if (qio_channel_socket_connect_sync(sioc, saddr, errp) < 0) {
if (qio_channel_socket_connect_sync(sioc, saddr[0], errp) < 0) {
return -1;
}
vnc_connect(vd, sioc, false, false);
@ -3703,6 +3760,7 @@ static int vnc_display_listen_addr(VncDisplay *vd,
SocketAddress **rawaddrs = NULL;
size_t nrawaddrs = 0;
Error *listenerr = NULL;
bool listening = false;
size_t i;
if (qio_dns_resolver_lookup_sync(resolver, addr, &nrawaddrs,
@ -3718,6 +3776,7 @@ static int vnc_display_listen_addr(VncDisplay *vd,
sioc, rawaddrs[i], listenerr == NULL ? &listenerr : NULL) < 0) {
continue;
}
listening = true;
(*nlsock)++;
*lsock = g_renew(QIOChannelSocket *, *lsock, *nlsock);
*lsock_tag = g_renew(guint, *lsock_tag, *nlsock);
@ -3732,7 +3791,7 @@ static int vnc_display_listen_addr(VncDisplay *vd,
g_free(rawaddrs);
if (listenerr) {
if (*nlsock == 0) {
if (!listening) {
error_propagate(errp, listenerr);
return -1;
} else {
@ -3751,28 +3810,33 @@ static int vnc_display_listen_addr(VncDisplay *vd,
static int vnc_display_listen(VncDisplay *vd,
SocketAddress *saddr,
SocketAddress *wsaddr,
SocketAddress **saddr,
size_t nsaddr,
SocketAddress **wsaddr,
size_t nwsaddr,
Error **errp)
{
vd->is_unix = saddr->type == SOCKET_ADDRESS_KIND_UNIX;
size_t i;
if (vnc_display_listen_addr(vd, saddr,
"vnc-listen",
&vd->lsock,
&vd->lsock_tag,
&vd->nlsock,
errp) < 0) {
return -1;
for (i = 0; i < nsaddr; i++) {
if (vnc_display_listen_addr(vd, saddr[i],
"vnc-listen",
&vd->lsock,
&vd->lsock_tag,
&vd->nlsock,
errp) < 0) {
return -1;
}
}
if (wsaddr &&
vnc_display_listen_addr(vd, wsaddr,
"vnc-ws-listen",
&vd->lwebsock,
&vd->lwebsock_tag,
&vd->nlwebsock,
errp) < 0) {
return -1;
for (i = 0; i < nwsaddr; i++) {
if (vnc_display_listen_addr(vd, wsaddr[i],
"vnc-ws-listen",
&vd->lwebsock,
&vd->lwebsock_tag,
&vd->nlwebsock,
errp) < 0) {
return -1;
}
}
return 0;
@ -3783,7 +3847,8 @@ void vnc_display_open(const char *id, Error **errp)
{
VncDisplay *vd = vnc_display_find(id);
QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id);
SocketAddress *saddr = NULL, *wsaddr = NULL;
SocketAddress **saddr = NULL, **wsaddr = NULL;
size_t nsaddr, nwsaddr;
const char *share, *device_id;
QemuConsole *con;
bool password = false;
@ -3796,6 +3861,7 @@ void vnc_display_open(const char *id, Error **errp)
int acl = 0;
int lock_key_sync = 1;
int key_delay_ms;
size_t i;
if (!vd) {
error_setg(errp, "VNC display not active");
@ -3807,7 +3873,8 @@ void vnc_display_open(const char *id, Error **errp)
return;
}
if (vnc_display_get_addresses(opts, &saddr, &wsaddr, errp) < 0) {
if (vnc_display_get_addresses(opts, &saddr, &nsaddr,
&wsaddr, &nwsaddr, errp) < 0) {
goto fail;
}
@ -4001,11 +4068,11 @@ void vnc_display_open(const char *id, Error **errp)
}
if (reverse) {
if (vnc_display_connect(vd, saddr, wsaddr, errp) < 0) {
if (vnc_display_connect(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) {
goto fail;
}
} else {
if (vnc_display_listen(vd, saddr, wsaddr, errp) < 0) {
if (vnc_display_listen(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) {
goto fail;
}
}
@ -4014,14 +4081,18 @@ void vnc_display_open(const char *id, Error **errp)
vnc_display_print_local_addr(vd);
}
qapi_free_SocketAddress(saddr);
qapi_free_SocketAddress(wsaddr);
cleanup:
for (i = 0; i < nsaddr; i++) {
qapi_free_SocketAddress(saddr[i]);
}
for (i = 0; i < nwsaddr; i++) {
qapi_free_SocketAddress(wsaddr[i]);
}
return;
fail:
vnc_display_close(vd);
qapi_free_SocketAddress(saddr);
qapi_free_SocketAddress(wsaddr);
goto cleanup;
}
void vnc_display_add_client(const char *id, int csock, bool skipauth)