Fix: reply to version check even on protocol mismatch

[lttng-tools.git] / src / bin / lttng-relayd / main.c

diff --git a/src/bin/lttng-relayd/main.c b/src/bin/lttng-relayd/main.c
index 8a183db28d226a0b25d924889a4ac9ed2715e11a..4f368ddacd944bfd0ea4d97f14304ad0d14ee641 100644 (file)
--- a/src/bin/lttng-relayd/main.c
+++ b/src/bin/lttng-relayd/main.c
@@ -70,6 +70,7 @@
 #include "stream.h"
 #include "connection.h"
 #include "tracefile-array.h"
+#include "tcp_keep_alive.h"
 
 /* command line options */
 char *opt_output_path;
@@ -891,6 +892,15 @@ restart:
                                        lttcomm_destroy_sock(newsock);
                                        goto error;
                                }
+
+                               ret = socket_apply_keep_alive_config(newsock->fd);
+                               if (ret < 0) {
+                                       ERR("Failed to apply TCP keep-alive configuration on socket (%i)",
+                                                       newsock->fd);
+                                       lttcomm_destroy_sock(newsock);
+                                       goto error;
+                               }
+
                                new_conn = connection_create(newsock, type);
                                if (!new_conn) {
                                        lttcomm_destroy_sock(newsock);
@@ -1583,6 +1593,7 @@ static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr,
 {
        int ret;
        struct lttcomm_relayd_version reply, msg;
+       bool compatible = true;
 
        conn->version_check_done = 1;
 
@@ -1607,9 +1618,7 @@ static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr,
        if (reply.major != be32toh(msg.major)) {
                DBG("Incompatible major versions (%u vs %u), deleting session",
                                reply.major, be32toh(msg.major));
-               connection_put(conn);
-               ret = 0;
-               goto end;
+               compatible = false;
        }
 
        conn->major = reply.major;
@@ -1628,6 +1637,11 @@ static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr,
                ERR("Relay sending version");
        }
 
+       if (!compatible) {
+               ret = -1;
+               goto end;
+       }
+
        DBG("Version check done using protocol %u.%u", conn->major,
                        conn->minor);