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diff --git a/tests/sys/netinet/so_reuseport_lb_test.c b/tests/sys/netinet/so_reuseport_lb_test.c
--- a/tests/sys/netinet/so_reuseport_lb_test.c
+++ b/tests/sys/netinet/so_reuseport_lb_test.c
@@ -377,11 +377,69 @@
}
}
+/*
+ * Try calling listen(2) twice on a socket with SO_REUSEPORT_LB set.
+ */
+ATF_TC_WITHOUT_HEAD(double_listen_ipv4);
+ATF_TC_BODY(double_listen_ipv4, tc)
+{
+ struct sockaddr_in sin;
+ int error, s;
+
+ s = lb_listen_socket(PF_INET, 0);
+
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_len = sizeof(sin);
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons(0);
+ sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ error = bind(s, (struct sockaddr *)&sin, sizeof(sin));
+ ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
+
+ error = listen(s, 1);
+ ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
+ error = listen(s, 2);
+ ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
+
+ error = close(s);
+ ATF_REQUIRE_MSG(error == 0, "close() failed: %s", strerror(errno));
+}
+
+/*
+ * Try calling listen(2) twice on a socket with SO_REUSEPORT_LB set.
+ */
+ATF_TC_WITHOUT_HEAD(double_listen_ipv6);
+ATF_TC_BODY(double_listen_ipv6, tc)
+{
+ struct sockaddr_in6 sin6;
+ int error, s;
+
+ s = lb_listen_socket(PF_INET6, 0);
+
+ memset(&sin6, 0, sizeof(sin6));
+ sin6.sin6_len = sizeof(sin6);
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_port = htons(0);
+ sin6.sin6_addr = in6addr_loopback;
+ error = bind(s, (struct sockaddr *)&sin6, sizeof(sin6));
+ ATF_REQUIRE_MSG(error == 0, "bind() failed: %s", strerror(errno));
+
+ error = listen(s, 1);
+ ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
+ error = listen(s, 2);
+ ATF_REQUIRE_MSG(error == 0, "listen() failed: %s", strerror(errno));
+
+ error = close(s);
+ ATF_REQUIRE_MSG(error == 0, "close() failed: %s", strerror(errno));
+}
+
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, basic_ipv4);
ATF_TP_ADD_TC(tp, basic_ipv6);
ATF_TP_ADD_TC(tp, concurrent_add);
+ ATF_TP_ADD_TC(tp, double_listen_ipv4);
+ ATF_TP_ADD_TC(tp, double_listen_ipv6);
return (atf_no_error());
}

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