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virsh: cmdDomDisplay: Extract loop body fetching display URIs into 'virshGetOneDisplay'
Separate the code so that the function is not as massive. Note that this is a minimal extraction which does not clean up the code meant for looping. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa
parent
c6bb274693
commit
364b4f0a0d
@ -11659,30 +11659,203 @@ static const vshCmdOptDef opts_domdisplay[] = {
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{.name = NULL}
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};
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static char *
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virshGetOneDisplay(vshControl *ctl,
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const char *scheme,
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xmlXPathContext *ctxt)
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{
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const char *xpath_fmt = "string(/domain/devices/graphics[@type='%s']/%s)";
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g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
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char *xpath = NULL;
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char *listen_addr = NULL;
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int port = 0;
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int tls_port = 0;
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char *type_conn = NULL;
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char *sockpath = NULL;
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char *passwd = NULL;
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int tmp;
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bool params = false;
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virSocketAddr addr;
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/* Create our XPATH lookup for the current display's port */
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VIR_FREE(xpath);
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xpath = g_strdup_printf(xpath_fmt, scheme, "@port");
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/* Attempt to get the port number for the current graphics scheme */
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tmp = virXPathInt(xpath, ctxt, &port);
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VIR_FREE(xpath);
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/* If there is no port number for this type, then jump to the next
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* scheme */
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if (tmp)
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port = 0;
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/* Create our XPATH lookup for TLS Port (automatically skipped
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* for unsupported schemes */
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xpath = g_strdup_printf(xpath_fmt, scheme, "@tlsPort");
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/* Attempt to get the TLS port number */
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tmp = virXPathInt(xpath, ctxt, &tls_port);
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VIR_FREE(xpath);
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if (tmp)
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tls_port = 0;
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/* Create our XPATH lookup for the current display's address */
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xpath = g_strdup_printf(xpath_fmt, scheme, "@listen");
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/* Attempt to get the listening addr if set for the current
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* graphics scheme */
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VIR_FREE(listen_addr);
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listen_addr = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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/* Create our XPATH lookup for the current spice type. */
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xpath = g_strdup_printf(xpath_fmt, scheme, "listen/@type");
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/* Attempt to get the type of spice connection */
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VIR_FREE(type_conn);
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type_conn = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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if (STREQ_NULLABLE(type_conn, "socket")) {
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if (!sockpath) {
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xpath = g_strdup_printf(xpath_fmt, scheme, "listen/@socket");
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sockpath = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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}
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}
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if (!port && !tls_port && !sockpath)
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goto cleanup;
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if (!listen_addr) {
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/* The subelement address - <listen address='xyz'/> -
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* *should* have been automatically backfilled into its
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* parent <graphics listen='xyz'> (which we just tried to
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* retrieve into listen_addr above) but in some cases it
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* isn't, so we also do an explicit check for the
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* subelement (which, by the way, doesn't exist on libvirt
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* < 0.9.4, so we really do need to check both places)
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*/
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xpath = g_strdup_printf(xpath_fmt, scheme, "listen/@address");
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listen_addr = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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} else {
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/* If listen_addr is 0.0.0.0 or [::] we should try to parse URI and set
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* listen_addr based on current URI. */
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if (virSocketAddrParse(&addr, listen_addr, AF_UNSPEC) > 0 &&
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virSocketAddrIsWildcard(&addr)) {
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virConnectPtr conn = ((virshControl *)(ctl->privData))->conn;
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char *uriStr = virConnectGetURI(conn);
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virURI *uri = NULL;
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if (uriStr) {
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uri = virURIParse(uriStr);
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VIR_FREE(uriStr);
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}
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/* It's safe to free the listen_addr even if parsing of URI
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* fails, if there is no listen_addr we will print "localhost". */
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VIR_FREE(listen_addr);
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if (uri) {
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listen_addr = g_strdup(uri->server);
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virURIFree(uri);
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}
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}
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}
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/* We can query this info for all the graphics types since we'll
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* get nothing for the unsupported ones (just rdp for now).
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* Also the parameter '--include-password' was already taken
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* care of when getting the XML */
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/* Create our XPATH lookup for the password */
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xpath = g_strdup_printf(xpath_fmt, scheme, "@passwd");
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/* Attempt to get the password */
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VIR_FREE(passwd);
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passwd = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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/* Build up the full URI, starting with the scheme */
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if (sockpath)
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virBufferAsprintf(&buf, "%s+unix://", scheme);
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else
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virBufferAsprintf(&buf, "%s://", scheme);
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/* There is no user, so just append password if there's any */
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if (STREQ(scheme, "vnc") && passwd)
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virBufferAsprintf(&buf, ":%s@", passwd);
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/* Then host name or IP */
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if (!listen_addr && !sockpath)
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virBufferAddLit(&buf, "localhost");
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else if (!sockpath && strchr(listen_addr, ':'))
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virBufferAsprintf(&buf, "[%s]", listen_addr);
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else if (sockpath)
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virBufferAsprintf(&buf, "%s", sockpath);
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else
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virBufferAsprintf(&buf, "%s", listen_addr);
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/* Free socket to prepare the pointer for the next iteration */
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VIR_FREE(sockpath);
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/* Add the port */
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if (port) {
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if (STREQ(scheme, "vnc")) {
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/* VNC protocol handlers take their port number as
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* 'port' - 5900 */
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port -= 5900;
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}
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virBufferAsprintf(&buf, ":%d", port);
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}
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/* TLS Port */
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if (tls_port) {
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virBufferAsprintf(&buf,
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"?tls-port=%d",
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tls_port);
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params = true;
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}
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if (STREQ(scheme, "spice") && passwd) {
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virBufferAsprintf(&buf,
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"%spassword=%s",
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params ? "&" : "?",
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passwd);
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params = true;
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}
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cleanup:
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VIR_FREE(xpath);
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VIR_FREE(type_conn);
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VIR_FREE(sockpath);
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VIR_FREE(passwd);
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VIR_FREE(listen_addr);
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return virBufferContentAndReset(&buf);
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}
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static bool
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cmdDomDisplay(vshControl *ctl, const vshCmd *cmd)
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{
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g_autoptr(xmlDoc) xml = NULL;
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g_autoptr(xmlXPathContext) ctxt = NULL;
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g_autoptr(virshDomain) dom = NULL;
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g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
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bool ret = false;
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char *xpath = NULL;
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char *listen_addr = NULL;
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int port, tls_port = 0;
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char *type_conn = NULL;
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char *sockpath = NULL;
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char *passwd = NULL;
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char *output = NULL;
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const char *scheme[] = { "vnc", "spice", "rdp", NULL };
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const char *type = NULL;
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int iter = 0;
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int tmp;
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int flags = 0;
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bool params = false;
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bool all = vshCommandOptBool(cmd, "all");
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const char *xpath_fmt = "string(/domain/devices/graphics[@type='%s']/%s)";
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virSocketAddr addr;
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VSH_EXCLUSIVE_OPTIONS("all", "type");
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@ -11705,169 +11878,16 @@ cmdDomDisplay(vshControl *ctl, const vshCmd *cmd)
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/* Attempt to grab our display info */
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for (iter = 0; scheme[iter] != NULL; iter++) {
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g_autofree char *display = NULL;
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/* Particular scheme requested */
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if (!all && type && STRNEQ(type, scheme[iter]))
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continue;
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/* Create our XPATH lookup for the current display's port */
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VIR_FREE(xpath);
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xpath = g_strdup_printf(xpath_fmt, scheme[iter], "@port");
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/* Attempt to get the port number for the current graphics scheme */
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tmp = virXPathInt(xpath, ctxt, &port);
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VIR_FREE(xpath);
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/* If there is no port number for this type, then jump to the next
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* scheme */
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if (tmp)
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port = 0;
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/* Create our XPATH lookup for TLS Port (automatically skipped
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* for unsupported schemes */
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xpath = g_strdup_printf(xpath_fmt, scheme[iter], "@tlsPort");
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/* Attempt to get the TLS port number */
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tmp = virXPathInt(xpath, ctxt, &tls_port);
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VIR_FREE(xpath);
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if (tmp)
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tls_port = 0;
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/* Create our XPATH lookup for the current display's address */
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xpath = g_strdup_printf(xpath_fmt, scheme[iter], "@listen");
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/* Attempt to get the listening addr if set for the current
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* graphics scheme */
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VIR_FREE(listen_addr);
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listen_addr = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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/* Create our XPATH lookup for the current spice type. */
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xpath = g_strdup_printf(xpath_fmt, scheme[iter], "listen/@type");
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/* Attempt to get the type of spice connection */
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VIR_FREE(type_conn);
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type_conn = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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if (STREQ_NULLABLE(type_conn, "socket")) {
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if (!sockpath) {
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xpath = g_strdup_printf(xpath_fmt, scheme[iter], "listen/@socket");
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sockpath = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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}
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}
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if (!port && !tls_port && !sockpath)
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if (!(display = virshGetOneDisplay(ctl, scheme[iter], ctxt)))
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continue;
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if (!listen_addr) {
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/* The subelement address - <listen address='xyz'/> -
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* *should* have been automatically backfilled into its
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* parent <graphics listen='xyz'> (which we just tried to
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* retrieve into listen_addr above) but in some cases it
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* isn't, so we also do an explicit check for the
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* subelement (which, by the way, doesn't exist on libvirt
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* < 0.9.4, so we really do need to check both places)
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*/
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xpath = g_strdup_printf(xpath_fmt, scheme[iter], "listen/@address");
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listen_addr = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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} else {
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/* If listen_addr is 0.0.0.0 or [::] we should try to parse URI and set
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* listen_addr based on current URI. */
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if (virSocketAddrParse(&addr, listen_addr, AF_UNSPEC) > 0 &&
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virSocketAddrIsWildcard(&addr)) {
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virConnectPtr conn = ((virshControl *)(ctl->privData))->conn;
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char *uriStr = virConnectGetURI(conn);
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virURI *uri = NULL;
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if (uriStr) {
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uri = virURIParse(uriStr);
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VIR_FREE(uriStr);
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}
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/* It's safe to free the listen_addr even if parsing of URI
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* fails, if there is no listen_addr we will print "localhost". */
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VIR_FREE(listen_addr);
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if (uri) {
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listen_addr = g_strdup(uri->server);
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virURIFree(uri);
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}
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}
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}
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/* We can query this info for all the graphics types since we'll
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* get nothing for the unsupported ones (just rdp for now).
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* Also the parameter '--include-password' was already taken
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* care of when getting the XML */
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/* Create our XPATH lookup for the password */
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xpath = g_strdup_printf(xpath_fmt, scheme[iter], "@passwd");
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/* Attempt to get the password */
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VIR_FREE(passwd);
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passwd = virXPathString(xpath, ctxt);
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VIR_FREE(xpath);
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/* Build up the full URI, starting with the scheme */
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if (sockpath)
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virBufferAsprintf(&buf, "%s+unix://", scheme[iter]);
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else
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virBufferAsprintf(&buf, "%s://", scheme[iter]);
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/* There is no user, so just append password if there's any */
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if (STREQ(scheme[iter], "vnc") && passwd)
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virBufferAsprintf(&buf, ":%s@", passwd);
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/* Then host name or IP */
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if (!listen_addr && !sockpath)
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virBufferAddLit(&buf, "localhost");
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else if (!sockpath && strchr(listen_addr, ':'))
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virBufferAsprintf(&buf, "[%s]", listen_addr);
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else if (sockpath)
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virBufferAsprintf(&buf, "%s", sockpath);
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else
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virBufferAsprintf(&buf, "%s", listen_addr);
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/* Free socket to prepare the pointer for the next iteration */
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VIR_FREE(sockpath);
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/* Add the port */
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if (port) {
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if (STREQ(scheme[iter], "vnc")) {
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/* VNC protocol handlers take their port number as
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* 'port' - 5900 */
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port -= 5900;
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}
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virBufferAsprintf(&buf, ":%d", port);
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}
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/* TLS Port */
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if (tls_port) {
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virBufferAsprintf(&buf,
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"?tls-port=%d",
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tls_port);
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params = true;
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}
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if (STREQ(scheme[iter], "spice") && passwd) {
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virBufferAsprintf(&buf,
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"%spassword=%s",
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params ? "&" : "?",
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passwd);
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params = true;
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}
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/* Print out our full URI */
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VIR_FREE(output);
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output = virBufferContentAndReset(&buf);
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vshPrint(ctl, "%s", output);
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vshPrint(ctl, "%s", display);
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/* We got what we came for so return successfully */
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ret = true;
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@ -11884,12 +11904,6 @@ cmdDomDisplay(vshControl *ctl, const vshCmd *cmd)
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}
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cleanup:
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VIR_FREE(xpath);
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VIR_FREE(type_conn);
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VIR_FREE(sockpath);
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VIR_FREE(passwd);
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VIR_FREE(listen_addr);
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VIR_FREE(output);
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return ret;
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}
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Block a user