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From 570b15e0ea71950ff14ddc2bf667e9e361720939 Mon Sep 17 00:00:00 2001
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From: Frediano Ziglio <freddy77@gmail.com>
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Date: Thu, 24 Sep 2020 12:13:44 +0100
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Subject: [PATCH vd_agent_linux 15/17] vdagentd: Limit number of agents per
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session to 1
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Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
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Acked-by: Uri Lublin <uril@redhat.com>
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---
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src/vdagentd/vdagentd.c | 24 ++++++++++++++++++++++++
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1 file changed, 24 insertions(+)
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diff --git a/src/vdagentd/vdagentd.c b/src/vdagentd/vdagentd.c
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index bb39340..5ef547e 100644
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--- a/src/vdagentd/vdagentd.c
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+++ b/src/vdagentd/vdagentd.c
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@@ -955,6 +955,20 @@ static gboolean remove_active_xfers(gpointer key, gpointer value, gpointer conn)
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return 0;
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}
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+/* Check if this connection matches the passed session */
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+static int connection_matches_session(UdscsConnection *conn, void *priv)
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+{
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+ const char *session = priv;
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+ const struct agent_data *agent_data = g_object_get_data(G_OBJECT(conn), "agent_data");
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+
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+ if (!agent_data || !agent_data->session ||
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+ strcmp(agent_data->session, session) != 0) {
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+ return 0;
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+ }
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+
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+ return 1;
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+}
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+
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/* Check a given process has a given UID */
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static bool check_uid_of_pid(pid_t pid, uid_t uid)
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{
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@@ -1007,6 +1021,16 @@ static void agent_connect(UdscsConnection *conn)
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udscs_server_destroy_connection(server, conn);
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return;
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}
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+
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+ // Check there are no other connection for this session
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+ // Note that "conn" is not counted as "agent_data" is still not attached to it
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+ if (udscs_server_for_all_clients(server, connection_matches_session,
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+ agent_data->session) > 0) {
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+ syslog(LOG_ERR, "An agent is already connected for this session");
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+ agent_data_destroy(agent_data);
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+ udscs_server_destroy_connection(server, conn);
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+ return;
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+ }
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}
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g_object_set_data_full(G_OBJECT(conn), "agent_data", agent_data,
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--
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2.26.2
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