relayd: clean-up: mix-up between LTTNG_PATH_MAX and LTTNG_NAME_MAX

[lttng-tools.git] / src / bin / lttng-relayd / cmd-2-4.c

diff --git a/src/bin/lttng-relayd/cmd-2-4.c b/src/bin/lttng-relayd/cmd-2-4.c
index 98cd92b2a12dcee45b378710fce694f0c9351e93..e20a838da932051572ebd2db984bf3b9eddaa408 100644 (file)
--- a/src/bin/lttng-relayd/cmd-2-4.c
+++ b/src/bin/lttng-relayd/cmd-2-4.c
@@ -19,33 +19,50 @@
 
 #define _LGPL_SOURCE
 #include <assert.h>
-#include <string.h>
 
 #include <common/common.h>
 #include <common/sessiond-comm/relayd.h>
 
 #include <common/compat/endian.h>
+#include <common/compat/string.h>
+#include <lttng/constant.h>
 
-#include "cmd-generic.h"
+#include "cmd-2-4.h"
 #include "lttng-relayd.h"
 
-int cmd_create_session_2_4(struct relay_connection *conn,
+int cmd_create_session_2_4(const struct lttng_buffer_view *payload,
                char *session_name, char *hostname,
                uint32_t *live_timer, bool *snapshot)
 {
        int ret;
        struct lttcomm_relayd_create_session_2_4 session_info;
+       size_t len;
 
-       ret = cmd_recv(conn->sock, &session_info, sizeof(session_info));
-       if (ret < 0) {
-               ERR("Unable to recv session info version 2.4");
+       if (payload->size < sizeof(session_info)) {
+               ERR("Unexpected payload size in \"cmd_create_session_2_4\": expected >= %zu bytes, got %zu bytes",
+                               sizeof(session_info), payload->size);
+               ret = -1;
                goto error;
        }
+       memcpy(&session_info, payload->data, sizeof(session_info));
+
+       len = lttng_strnlen(session_info.session_name, sizeof(session_info.session_name));
+       /* Ensure that NULL-terminated and fits in local filename length. */
+       if (len == sizeof(session_info.session_name) || len >= LTTNG_NAME_MAX) {
+               ret = -ENAMETOOLONG;
+               ERR("Session name too long");
+               goto error;
+       }
+       strncpy(session_name, session_info.session_name, LTTNG_NAME_MAX);
+
+       len = lttng_strnlen(session_info.hostname, sizeof(session_info.hostname));
+       if (len == sizeof(session_info.hostname) || len >= LTTNG_HOST_NAME_MAX) {
+               ret = -ENAMETOOLONG;
+               ERR("Session name too long");
+               goto error;
+       }
+       strncpy(hostname, session_info.hostname, LTTNG_HOST_NAME_MAX);
 
-       strncpy(session_name, session_info.session_name,
-                       sizeof(session_info.session_name));
-       strncpy(hostname, session_info.hostname,
-                       sizeof(session_info.hostname));
        *live_timer = be32toh(session_info.live_timer);
        *snapshot = be32toh(session_info.snapshot);