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-rw-r--r--src/libsystemd-network/test-lldp-rx.c378
1 files changed, 378 insertions, 0 deletions
diff --git a/src/libsystemd-network/test-lldp-rx.c b/src/libsystemd-network/test-lldp-rx.c
new file mode 100644
index 0000000..feb53b5
--- /dev/null
+++ b/src/libsystemd-network/test-lldp-rx.c
@@ -0,0 +1,378 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <net/ethernet.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "sd-event.h"
+#include "sd-lldp-rx.h"
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "lldp-network.h"
+#include "macro.h"
+#include "string-util.h"
+#include "tests.h"
+
+#define TEST_LLDP_PORT "em1"
+#define TEST_LLDP_TYPE_SYSTEM_NAME "systemd-lldp"
+#define TEST_LLDP_TYPE_SYSTEM_DESC "systemd-lldp-desc"
+
+static int test_fd[2] = EBADF_PAIR;
+static int lldp_rx_handler_calls;
+
+int lldp_network_bind_raw_socket(int ifindex) {
+ if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_fd) < 0)
+ return -errno;
+
+ return test_fd[0];
+}
+
+static void lldp_rx_handler(sd_lldp_rx *lldp_rx, sd_lldp_rx_event_t event, sd_lldp_neighbor *n, void *userdata) {
+ lldp_rx_handler_calls++;
+}
+
+static int start_lldp_rx(sd_lldp_rx **lldp_rx, sd_event *e, sd_lldp_rx_callback_t cb, void *cb_data) {
+ int r;
+
+ r = sd_lldp_rx_new(lldp_rx);
+ if (r < 0)
+ return r;
+
+ r = sd_lldp_rx_set_ifindex(*lldp_rx, 42);
+ if (r < 0)
+ return r;
+
+ r = sd_lldp_rx_set_callback(*lldp_rx, cb, cb_data);
+ if (r < 0)
+ return r;
+
+ r = sd_lldp_rx_attach_event(*lldp_rx, e, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_lldp_rx_start(*lldp_rx);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int stop_lldp_rx(sd_lldp_rx *lldp_rx) {
+ int r;
+
+ r = sd_lldp_rx_stop(lldp_rx);
+ if (r < 0)
+ return r;
+
+ r = sd_lldp_rx_detach_event(lldp_rx);
+ if (r < 0)
+ return r;
+
+ sd_lldp_rx_unref(lldp_rx);
+ safe_close(test_fd[1]);
+
+ return 0;
+}
+
+static void test_receive_basic_packet(sd_event *e) {
+
+ static const uint8_t frame[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
+ 0x03, 0x04, 0x05,
+ 0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port: interface name, "1/3" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ /* LLDP optional TLVs */
+ 0x08, 0x04, 0x50, 0x6f, 0x72, 0x74, /* Port Description: "Port" */
+ 0x0a, 0x03, 0x53, 0x59, 0x53, /* System Name: "SYS" */
+ 0x0c, 0x04, 0x66, 0x6f, 0x6f, 0x00, /* System Description: "foo" (NULL-terminated) */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+
+ sd_lldp_rx *lldp_rx;
+ sd_lldp_neighbor **neighbors;
+ uint8_t type;
+ const void *data;
+ uint16_t ttl;
+ size_t length;
+ const char *str;
+
+ lldp_rx_handler_calls = 0;
+ assert_se(start_lldp_rx(&lldp_rx, e, lldp_rx_handler, NULL) == 0);
+
+ assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
+ sd_event_run(e, 0);
+ assert_se(lldp_rx_handler_calls == 1);
+ assert_se(sd_lldp_rx_get_neighbors(lldp_rx, &neighbors) == 1);
+
+ assert_se(sd_lldp_neighbor_get_chassis_id(neighbors[0], &type, &data, &length) == 0);
+ assert_se(type == SD_LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS);
+ assert_se(length == ETH_ALEN);
+ assert_se(!memcmp(data, "\x00\x01\x02\x03\x04\x05", ETH_ALEN));
+
+ assert_se(sd_lldp_neighbor_get_port_id(neighbors[0], &type, &data, &length) == 0);
+ assert_se(type == SD_LLDP_PORT_SUBTYPE_INTERFACE_NAME);
+ assert_se(length == 3);
+ assert_se(!memcmp(data, "1/3", 3));
+
+ assert_se(sd_lldp_neighbor_get_port_description(neighbors[0], &str) == 0);
+ assert_se(streq(str, "Port"));
+
+ assert_se(sd_lldp_neighbor_get_system_name(neighbors[0], &str) == 0);
+ assert_se(streq(str, "SYS"));
+
+ assert_se(sd_lldp_neighbor_get_system_description(neighbors[0], &str) == 0);
+ assert_se(streq(str, "foo"));
+
+ assert_se(sd_lldp_neighbor_get_ttl(neighbors[0], &ttl) == 0);
+ assert_se(ttl == 120);
+
+ sd_lldp_neighbor_unref(neighbors[0]);
+ free(neighbors);
+
+ assert_se(stop_lldp_rx(lldp_rx) == 0);
+}
+
+static void test_receive_incomplete_packet(sd_event *e) {
+ sd_lldp_rx *lldp_rx;
+ sd_lldp_neighbor **neighbors;
+ uint8_t frame[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
+ 0x03, 0x04, 0x05,
+ 0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port: interface name, "1/3" */
+ /* Missing TTL */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+
+ lldp_rx_handler_calls = 0;
+ assert_se(start_lldp_rx(&lldp_rx, e, lldp_rx_handler, NULL) == 0);
+
+ assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
+ sd_event_run(e, 0);
+ assert_se(lldp_rx_handler_calls == 0);
+ assert_se(sd_lldp_rx_get_neighbors(lldp_rx, &neighbors) == 0);
+
+ assert_se(stop_lldp_rx(lldp_rx) == 0);
+}
+
+static void test_receive_oui_packet(sd_event *e) {
+ sd_lldp_rx *lldp_rx;
+ sd_lldp_neighbor **neighbors;
+ uint8_t frame[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x07, 0x04, 0x00, 0x01, 0x02, /* Chassis: MAC, 00:01:02:03:04:05 */
+ 0x03, 0x04, 0x05,
+ 0x04, 0x04, 0x05, 0x31, 0x2f, 0x33, /* Port TLV: interface name, "1/3" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ /* LLDP optional TLVs */
+ 0xfe, 0x06, 0x00, 0x80, 0xc2, 0x01, /* Port VLAN ID: 0x1234 */
+ 0x12, 0x34,
+ 0xfe, 0x07, 0x00, 0x80, 0xc2, 0x02, /* Port and protocol: flag 1, PPVID 0x7788 */
+ 0x01, 0x77, 0x88,
+ 0xfe, 0x0d, 0x00, 0x80, 0xc2, 0x03, /* VLAN Name: ID 0x1234, name "Vlan51" */
+ 0x12, 0x34, 0x06, 0x56, 0x6c, 0x61,
+ 0x6e, 0x35, 0x31,
+ 0xfe, 0x06, 0x00, 0x80, 0xc2, 0x06, /* Management VID: 0x0102 */
+ 0x01, 0x02,
+ 0xfe, 0x09, 0x00, 0x80, 0xc2, 0x07, /* Link aggregation: status 1, ID 0x00140012 */
+ 0x01, 0x00, 0x14, 0x00, 0x12,
+ 0xfe, 0x07, 0x00, 0x12, 0x0f, 0x02, /* 802.3 Power via MDI: PSE, MDI enabled */
+ 0x07, 0x01, 0x00,
+ 0x00, 0x00 /* End of LLDPDU */
+ };
+
+ lldp_rx_handler_calls = 0;
+ assert_se(start_lldp_rx(&lldp_rx, e, lldp_rx_handler, NULL) == 0);
+
+ assert_se(write(test_fd[1], frame, sizeof(frame)) == sizeof(frame));
+ sd_event_run(e, 0);
+ assert_se(lldp_rx_handler_calls == 1);
+ assert_se(sd_lldp_rx_get_neighbors(lldp_rx, &neighbors) == 1);
+
+ assert_se(sd_lldp_neighbor_tlv_rewind(neighbors[0]) >= 0);
+ assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_CHASSIS_ID) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_PORT_ID) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_TTL) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_PORT_VLAN_ID) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_PORT_PROTOCOL_VLAN_ID) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_VLAN_NAME) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_MANAGEMENT_VID) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_1, SD_LLDP_OUI_802_1_SUBTYPE_LINK_AGGREGATION) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_oui(neighbors[0], SD_LLDP_OUI_802_3, SD_LLDP_OUI_802_3_SUBTYPE_POWER_VIA_MDI) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) > 0);
+ assert_se(sd_lldp_neighbor_tlv_is_type(neighbors[0], SD_LLDP_TYPE_END) > 0);
+ assert_se(sd_lldp_neighbor_tlv_next(neighbors[0]) == 0);
+
+ sd_lldp_neighbor_unref(neighbors[0]);
+ free(neighbors);
+
+ assert_se(stop_lldp_rx(lldp_rx) == 0);
+}
+
+static void test_multiple_neighbors_sorted(sd_event *e) {
+
+ static const uint8_t frame1[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
+ 0x04, 0x04, 0x02, '2', '/', '3', /* Port component: "2/3" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+ static const uint8_t frame2[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x04, 0x01, '2', '/', '1', /* Chassis component: "2/1" */
+ 0x04, 0x04, 0x02, '1', '/', '3', /* Port component: "1/3" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+ static const uint8_t frame3[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x05, 0x01, '2', '/', '1', '0', /* Chassis component: "2/10" */
+ 0x04, 0x04, 0x02, '1', '/', '0', /* Port component: "1/0" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+ static const uint8_t frame4[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x05, 0x01, '2', '/', '1', '9', /* Chassis component: "2/19" */
+ 0x04, 0x04, 0x02, '1', '/', '0', /* Port component: "1/0" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+ static const uint8_t frame5[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
+ 0x04, 0x05, 0x02, '2', '/', '1', '0', /* Port component: "2/10" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+ static const uint8_t frame6[] = {
+ /* Ethernet header */
+ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03, /* Destination MAC */
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* Source MAC */
+ 0x88, 0xcc, /* Ethertype */
+ /* LLDP mandatory TLVs */
+ 0x02, 0x04, 0x01, '1', '/', '2', /* Chassis component: "1/2" */
+ 0x04, 0x05, 0x02, '2', '/', '3', '9', /* Port component: "2/10" */
+ 0x06, 0x02, 0x00, 0x78, /* TTL: 120 seconds */
+ 0x00, 0x00 /* End Of LLDPDU */
+ };
+ static const char* expected[] = {
+ /* ordered pairs of Chassis+Port */
+ "1/2", "2/10",
+ "1/2", "2/3",
+ "1/2", "2/39",
+ "2/1", "1/3",
+ "2/10", "1/0",
+ "2/19", "1/0",
+ };
+
+ sd_lldp_rx *lldp_rx;
+ sd_lldp_neighbor **neighbors;
+ int i;
+ uint8_t type;
+ const void *data;
+ size_t length, expected_length;
+ uint16_t ttl;
+
+ lldp_rx_handler_calls = 0;
+ assert_se(start_lldp_rx(&lldp_rx, e, lldp_rx_handler, NULL) == 0);
+
+ assert_se(write(test_fd[1], frame1, sizeof(frame1)) == sizeof(frame1));
+ sd_event_run(e, 0);
+ assert_se(write(test_fd[1], frame2, sizeof(frame2)) == sizeof(frame2));
+ sd_event_run(e, 0);
+ assert_se(write(test_fd[1], frame3, sizeof(frame3)) == sizeof(frame3));
+ sd_event_run(e, 0);
+ assert_se(write(test_fd[1], frame4, sizeof(frame4)) == sizeof(frame4));
+ sd_event_run(e, 0);
+ assert_se(write(test_fd[1], frame5, sizeof(frame5)) == sizeof(frame5));
+ sd_event_run(e, 0);
+ assert_se(write(test_fd[1], frame6, sizeof(frame6)) == sizeof(frame6));
+ sd_event_run(e, 0);
+ assert_se(lldp_rx_handler_calls == 6);
+
+ assert_se(sd_lldp_rx_get_neighbors(lldp_rx, &neighbors) == 6);
+
+ for (i = 0; i < 6; i++) {
+ assert_se(sd_lldp_neighbor_get_chassis_id(neighbors[i], &type, &data, &length) == 0);
+ assert_se(type == SD_LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT);
+ expected_length = strlen(expected[2 * i]);
+ assert_se(length == expected_length);
+ assert_se(memcmp(data, expected[2 * i], expected_length) == 0);
+
+ assert_se(sd_lldp_neighbor_get_port_id(neighbors[i], &type, &data, &length) == 0);
+ assert_se(type == SD_LLDP_PORT_SUBTYPE_PORT_COMPONENT);
+ expected_length = strlen(expected[2 * i + 1]);
+ assert_se(length == expected_length);
+ assert_se(memcmp(data, expected[2 * i + 1], expected_length) == 0);
+
+ assert_se(sd_lldp_neighbor_get_ttl(neighbors[i], &ttl) == 0);
+ assert_se(ttl == 120);
+ }
+
+ for (i = 0; i < 6; i++)
+ sd_lldp_neighbor_unref(neighbors[i]);
+ free(neighbors);
+
+ assert_se(stop_lldp_rx(lldp_rx) == 0);
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_(sd_event_unrefp) sd_event *e = NULL;
+
+ test_setup_logging(LOG_DEBUG);
+
+ /* LLDP reception tests */
+ assert_se(sd_event_new(&e) == 0);
+ test_receive_basic_packet(e);
+ test_receive_incomplete_packet(e);
+ test_receive_oui_packet(e);
+ test_multiple_neighbors_sorted(e);
+
+ return 0;
+}
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