Merge remote-tracking branch 'remotes/stefanberger/tags/pull-tpm-2019-07-08-1' into...

[mirror_qemu.git] / util / qemu-sockets.c

diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index fbbef69f62758553b1100b9d2bce57aa763ca414..a5092dbd12e7747ae322488a0d9b6b69d9f7920d 100644 (file)
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -21,14 +21,15 @@
 #include <linux/vm_sockets.h>
 #endif /* CONFIG_AF_VSOCK */
 
+#include "qemu-common.h"
 #include "monitor/monitor.h"
 #include "qapi/clone-visitor.h"
 #include "qapi/error.h"
+#include "qapi/qapi-visit-sockets.h"
 #include "qemu/sockets.h"
 #include "qemu/main-loop.h"
 #include "qapi/qobject-input-visitor.h"
 #include "qapi/qobject-output-visitor.h"
-#include "qapi-visit.h"
 #include "qemu/cutils.h"
 
 #ifndef AI_ADDRCONFIG
@@ -91,6 +92,14 @@ NetworkAddressFamily inet_netfamily(int family)
     return NETWORK_ADDRESS_FAMILY_UNKNOWN;
 }
 
+bool fd_is_socket(int fd)
+{
+    int optval;
+    socklen_t optlen = sizeof(optval);
+    return !qemu_getsockopt(fd, SOL_SOCKET, SO_TYPE, &optval, &optlen);
+}
+
+
 /*
  * Matrix we're trying to apply
  *
@@ -262,8 +271,8 @@ static int inet_listen_saddr(InetSocketAddress *saddr,
     /* create socket + bind/listen */
     for (e = res; e != NULL; e = e->ai_next) {
         getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
-                       uaddr,INET6_ADDRSTRLEN,uport,32,
-                       NI_NUMERICHOST | NI_NUMERICSERV);
+                        uaddr,INET6_ADDRSTRLEN,uport,32,
+                        NI_NUMERICHOST | NI_NUMERICSERV);
 
         port_min = inet_getport(e);
         port_max = saddr->has_to ? saddr->to + port_offset : port_min;
@@ -822,6 +831,7 @@ static int unix_listen_saddr(UnixSocketAddress *saddr,
     int sock, fd;
     char *pathbuf = NULL;
     const char *path;
+    size_t pathlen;
 
     sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
     if (sock < 0) {
@@ -837,7 +847,8 @@ static int unix_listen_saddr(UnixSocketAddress *saddr,
         path = pathbuf = g_strdup_printf("%s/qemu-socket-XXXXXX", tmpdir);
     }
 
-    if (strlen(path) > sizeof(un.sun_path)) {
+    pathlen = strlen(path);
+    if (pathlen > sizeof(un.sun_path)) {
         error_setg(errp, "UNIX socket path '%s' is too long", path);
         error_append_hint(errp, "Path must be less than %zu bytes\n",
                           sizeof(un.sun_path));
@@ -869,7 +880,7 @@ static int unix_listen_saddr(UnixSocketAddress *saddr,
 
     memset(&un, 0, sizeof(un));
     un.sun_family = AF_UNIX;
-    strncpy(un.sun_path, path, sizeof(un.sun_path));
+    memcpy(un.sun_path, path, pathlen);
 
     if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
         error_setg_errno(errp, errno, "Failed to bind socket to %s", path);
@@ -893,6 +904,7 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
 {
     struct sockaddr_un un;
     int sock, rc;
+    size_t pathlen;
 
     if (saddr->path == NULL) {
         error_setg(errp, "unix connect: no path specified");
@@ -905,7 +917,8 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
         return -1;
     }
 
-    if (strlen(saddr->path) > sizeof(un.sun_path)) {
+    pathlen = strlen(saddr->path);
+    if (pathlen > sizeof(un.sun_path)) {
         error_setg(errp, "UNIX socket path '%s' is too long", saddr->path);
         error_append_hint(errp, "Path must be less than %zu bytes\n",
                           sizeof(un.sun_path));
@@ -914,7 +927,7 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
 
     memset(&un, 0, sizeof(un));
     un.sun_family = AF_UNIX;
-    strncpy(un.sun_path, saddr->path, sizeof(un.sun_path));
+    memcpy(un.sun_path, saddr->path, pathlen);
 
     /* connect to peer */
     do {
@@ -958,26 +971,12 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
 /* compatibility wrapper */
 int unix_listen(const char *str, Error **errp)
 {
-    char *path, *optstr;
-    int sock, len;
     UnixSocketAddress *saddr;
+    int sock;
 
     saddr = g_new0(UnixSocketAddress, 1);
-
-    optstr = strchr(str, ',');
-    if (optstr) {
-        len = optstr - str;
-        if (len) {
-            path = g_malloc(len+1);
-            snprintf(path, len+1, "%.*s", len, str);
-            saddr->path = path;
-        }
-    } else {
-        saddr->path = g_strdup(str);
-    }
-
+    saddr->path = g_strdup(str);
     sock = unix_listen_saddr(saddr, errp);
-
     qapi_free_UnixSocketAddress(saddr);
     return sock;
 }
@@ -1034,6 +1033,30 @@ fail:
     return NULL;
 }
 
+static int socket_get_fd(const char *fdstr, Error **errp)
+{
+    int fd;
+    if (cur_mon) {
+        fd = monitor_get_fd(cur_mon, fdstr, errp);
+        if (fd < 0) {
+            return -1;
+        }
+    } else {
+        if (qemu_strtoi(fdstr, NULL, 10, &fd) < 0) {
+            error_setg_errno(errp, errno,
+                             "Unable to parse FD number %s",
+                             fdstr);
+            return -1;
+        }
+    }
+    if (!fd_is_socket(fd)) {
+        error_setg(errp, "File descriptor '%s' is not a socket", fdstr);
+        close(fd);
+        return -1;
+    }
+    return fd;
+}
+
 int socket_connect(SocketAddress *addr, Error **errp)
 {
     int fd;
@@ -1048,7 +1071,7 @@ int socket_connect(SocketAddress *addr, Error **errp)
         break;
 
     case SOCKET_ADDRESS_TYPE_FD:
-        fd = monitor_get_fd(cur_mon, addr->u.fd.str, errp);
+        fd = socket_get_fd(addr->u.fd.str, errp);
         break;
 
     case SOCKET_ADDRESS_TYPE_VSOCK:
@@ -1075,7 +1098,7 @@ int socket_listen(SocketAddress *addr, Error **errp)
         break;
 
     case SOCKET_ADDRESS_TYPE_FD:
-        fd = monitor_get_fd(cur_mon, addr->u.fd.str, errp);
+        fd = socket_get_fd(addr->u.fd.str, errp);
         break;
 
     case SOCKET_ADDRESS_TYPE_VSOCK: