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-rw-r--r--src/libsystemd-network/test-dhcp-server.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/src/libsystemd-network/test-dhcp-server.c b/src/libsystemd-network/test-dhcp-server.c
new file mode 100644
index 0000000..f8a4c2c
--- /dev/null
+++ b/src/libsystemd-network/test-dhcp-server.c
@@ -0,0 +1,322 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+ Copyright © 2013 Intel Corporation. All rights reserved.
+***/
+
+#include <errno.h>
+#include <net/if_arp.h>
+
+#include "sd-dhcp-server.h"
+#include "sd-event.h"
+
+#include "dhcp-server-internal.h"
+#include "tests.h"
+
+static void test_pool(struct in_addr *address, unsigned size, int ret) {
+ _cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL;
+
+ assert_se(sd_dhcp_server_new(&server, 1) >= 0);
+
+ assert_se(sd_dhcp_server_configure_pool(server, address, 8, 0, size) == ret);
+}
+
+static int test_basic(bool bind_to_interface) {
+ _cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ struct in_addr address_lo = {
+ .s_addr = htobe32(INADDR_LOOPBACK),
+ };
+ struct in_addr address_any = {
+ .s_addr = htobe32(INADDR_ANY),
+ };
+ int r;
+
+ log_debug("/* %s(bind_to_interface=%s) */", __func__, yes_no(bind_to_interface));
+
+ assert_se(sd_event_new(&event) >= 0);
+
+ /* attach to loopback interface */
+ assert_se(sd_dhcp_server_new(&server, 1) >= 0);
+ assert_se(server);
+ server->bind_to_interface = bind_to_interface;
+
+ assert_se(sd_dhcp_server_attach_event(server, event, 0) >= 0);
+ assert_se(sd_dhcp_server_attach_event(server, event, 0) == -EBUSY);
+ assert_se(sd_dhcp_server_get_event(server) == event);
+ assert_se(sd_dhcp_server_detach_event(server) >= 0);
+ assert_se(!sd_dhcp_server_get_event(server));
+ assert_se(sd_dhcp_server_attach_event(server, NULL, 0) >= 0);
+ assert_se(sd_dhcp_server_attach_event(server, NULL, 0) == -EBUSY);
+
+ assert_se(sd_dhcp_server_ref(server) == server);
+ assert_se(!sd_dhcp_server_unref(server));
+
+ assert_se(sd_dhcp_server_start(server) == -EUNATCH);
+
+ assert_se(sd_dhcp_server_configure_pool(server, &address_any, 28, 0, 0) == -EINVAL);
+ assert_se(sd_dhcp_server_configure_pool(server, &address_lo, 38, 0, 0) == -ERANGE);
+ assert_se(sd_dhcp_server_configure_pool(server, &address_lo, 8, 0, 0) >= 0);
+ assert_se(sd_dhcp_server_configure_pool(server, &address_lo, 8, 0, 0) >= 0);
+
+ test_pool(&address_any, 1, -EINVAL);
+ test_pool(&address_lo, 1, 0);
+
+ r = sd_dhcp_server_start(server);
+ if (r == -EPERM)
+ return r;
+ assert_se(r >= 0);
+
+ assert_se(sd_dhcp_server_start(server) >= 0);
+ assert_se(sd_dhcp_server_stop(server) >= 0);
+ assert_se(sd_dhcp_server_stop(server) >= 0);
+ assert_se(sd_dhcp_server_start(server) >= 0);
+
+ return 0;
+}
+
+static void test_message_handler(void) {
+ _cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL;
+ struct {
+ DHCPMessage message;
+ struct {
+ uint8_t code;
+ uint8_t length;
+ uint8_t type;
+ } _packed_ option_type;
+ struct {
+ uint8_t code;
+ uint8_t length;
+ be32_t address;
+ } _packed_ option_requested_ip;
+ struct {
+ uint8_t code;
+ uint8_t length;
+ be32_t address;
+ } _packed_ option_server_id;
+ struct {
+ uint8_t code;
+ uint8_t length;
+ uint8_t id[7];
+ } _packed_ option_client_id;
+ uint8_t end;
+ } _packed_ test = {
+ .message.op = BOOTREQUEST,
+ .message.htype = ARPHRD_ETHER,
+ .message.hlen = ETHER_ADDR_LEN,
+ .message.xid = htobe32(0x12345678),
+ .message.chaddr = { 'A', 'B', 'C', 'D', 'E', 'F' },
+ .option_type.code = SD_DHCP_OPTION_MESSAGE_TYPE,
+ .option_type.length = 1,
+ .option_type.type = DHCP_DISCOVER,
+ .end = SD_DHCP_OPTION_END,
+ };
+ struct in_addr address_lo = {
+ .s_addr = htobe32(INADDR_LOOPBACK),
+ };
+ struct in_addr static_lease_address = {
+ .s_addr = htobe32(INADDR_LOOPBACK + 42),
+ };
+ static uint8_t static_lease_client_id[7] = {0x01, 'A', 'B', 'C', 'D', 'E', 'G' };
+
+ log_debug("/* %s */", __func__);
+
+ assert_se(sd_dhcp_server_new(&server, 1) >= 0);
+ assert_se(sd_dhcp_server_configure_pool(server, &address_lo, 8, 0, 0) >= 0);
+ assert_se(sd_dhcp_server_set_static_lease(server, &static_lease_address, static_lease_client_id,
+ ELEMENTSOF(static_lease_client_id)) >= 0);
+ assert_se(sd_dhcp_server_attach_event(server, NULL, 0) >= 0);
+ assert_se(sd_dhcp_server_start(server) >= 0);
+
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+
+ test.end = 0;
+ /* TODO, shouldn't this fail? */
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+ test.end = SD_DHCP_OPTION_END;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+
+ test.option_type.code = 0;
+ test.option_type.length = 0;
+ test.option_type.type = 0;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == -ENOMSG);
+ test.option_type.code = SD_DHCP_OPTION_MESSAGE_TYPE;
+ test.option_type.length = 1;
+ test.option_type.type = DHCP_DISCOVER;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+
+ test.message.op = 0;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == 0);
+ test.message.op = BOOTREQUEST;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+
+ test.message.htype = 0;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+ test.message.htype = ARPHRD_ETHER;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+
+ test.message.hlen = 0;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == -EBADMSG);
+ test.message.hlen = ETHER_ADDR_LEN;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_OFFER);
+
+ test.option_type.type = DHCP_REQUEST;
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == 0);
+ test.option_requested_ip.code = SD_DHCP_OPTION_REQUESTED_IP_ADDRESS;
+ test.option_requested_ip.length = 4;
+ test.option_requested_ip.address = htobe32(0x12345678);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_NAK);
+ test.option_server_id.code = SD_DHCP_OPTION_SERVER_IDENTIFIER;
+ test.option_server_id.length = 4;
+ test.option_server_id.address = htobe32(INADDR_LOOPBACK);
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 3);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_ACK);
+
+ test.option_server_id.address = htobe32(0x12345678);
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 3);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == 0);
+ test.option_server_id.address = htobe32(INADDR_LOOPBACK);
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 4);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == 0);
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 3);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_ACK);
+
+ test.option_client_id.code = SD_DHCP_OPTION_CLIENT_IDENTIFIER;
+ test.option_client_id.length = 7;
+ test.option_client_id.id[0] = 0x01;
+ test.option_client_id.id[1] = 'A';
+ test.option_client_id.id[2] = 'B';
+ test.option_client_id.id[3] = 'C';
+ test.option_client_id.id[4] = 'D';
+ test.option_client_id.id[5] = 'E';
+ test.option_client_id.id[6] = 'F';
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_ACK);
+
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 30);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == 0);
+
+ /* request address reserved for static lease (unmatching client ID) */
+ test.option_client_id.id[6] = 'H';
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 42);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == 0);
+
+ /* request unmatching address */
+ test.option_client_id.id[6] = 'G';
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 41);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == 0);
+
+ /* request matching address */
+ test.option_client_id.id[6] = 'G';
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 42);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_ACK);
+
+ /* try again */
+ test.option_client_id.id[6] = 'G';
+ test.option_requested_ip.address = htobe32(INADDR_LOOPBACK + 42);
+ assert_se(dhcp_server_handle_message(server, (DHCPMessage*)&test, sizeof(test)) == DHCP_ACK);
+}
+
+static uint64_t client_id_hash_helper(DHCPClientId *id, uint8_t key[HASH_KEY_SIZE]) {
+ struct siphash state;
+
+ siphash24_init(&state, key);
+ client_id_hash_func(id, &state);
+
+ return htole64(siphash24_finalize(&state));
+}
+
+static void test_client_id_hash(void) {
+ DHCPClientId a = {
+ .length = 4,
+ }, b = {
+ .length = 4,
+ };
+ uint8_t hash_key[HASH_KEY_SIZE] = {
+ '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
+ };
+
+ log_debug("/* %s */", __func__);
+
+ a.data = (uint8_t*)strdup("abcd");
+ b.data = (uint8_t*)strdup("abcd");
+
+ assert_se(client_id_compare_func(&a, &b) == 0);
+ assert_se(client_id_hash_helper(&a, hash_key) == client_id_hash_helper(&b, hash_key));
+ a.length = 3;
+ assert_se(client_id_compare_func(&a, &b) != 0);
+ a.length = 4;
+ assert_se(client_id_compare_func(&a, &b) == 0);
+ assert_se(client_id_hash_helper(&a, hash_key) == client_id_hash_helper(&b, hash_key));
+
+ b.length = 3;
+ assert_se(client_id_compare_func(&a, &b) != 0);
+ b.length = 4;
+ assert_se(client_id_compare_func(&a, &b) == 0);
+ assert_se(client_id_hash_helper(&a, hash_key) == client_id_hash_helper(&b, hash_key));
+
+ free(b.data);
+ b.data = (uint8_t*)strdup("abce");
+ assert_se(client_id_compare_func(&a, &b) != 0);
+
+ free(a.data);
+ free(b.data);
+}
+
+static void test_static_lease(void) {
+ _cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL;
+
+ log_debug("/* %s */", __func__);
+
+ assert_se(sd_dhcp_server_new(&server, 1) >= 0);
+
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x01020304 },
+ (uint8_t*) &(uint32_t) { 0x01020304 }, sizeof(uint32_t)) >= 0);
+ /* Duplicated entry. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x01020304 },
+ (uint8_t*) &(uint32_t) { 0x01020304 }, sizeof(uint32_t)) == -EEXIST);
+ /* Address is conflicted. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x01020304 },
+ (uint8_t*) &(uint32_t) { 0x01020305 }, sizeof(uint32_t)) == -EEXIST);
+ /* Client ID is conflicted. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x01020305 },
+ (uint8_t*) &(uint32_t) { 0x01020304 }, sizeof(uint32_t)) == -EEXIST);
+
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x01020305 },
+ (uint8_t*) &(uint32_t) { 0x01020305 }, sizeof(uint32_t)) >= 0);
+ /* Remove the previous entry. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x00000000 },
+ (uint8_t*) &(uint32_t) { 0x01020305 }, sizeof(uint32_t)) >= 0);
+ /* Then, set a different address. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x01020306 },
+ (uint8_t*) &(uint32_t) { 0x01020305 }, sizeof(uint32_t)) >= 0);
+ /* Remove again. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x00000000 },
+ (uint8_t*) &(uint32_t) { 0x01020305 }, sizeof(uint32_t)) >= 0);
+ /* Try to remove non-existent entry. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x00000000 },
+ (uint8_t*) &(uint32_t) { 0x01020305 }, sizeof(uint32_t)) >= 0);
+ /* Try to remove non-existent entry. */
+ assert_se(sd_dhcp_server_set_static_lease(server, &(struct in_addr) { .s_addr = 0x00000000 },
+ (uint8_t*) &(uint32_t) { 0x01020306 }, sizeof(uint32_t)) >= 0);
+}
+
+int main(int argc, char *argv[]) {
+ int r;
+
+ test_setup_logging(LOG_DEBUG);
+
+ test_client_id_hash();
+ test_static_lease();
+
+ r = test_basic(true);
+ if (r < 0)
+ return log_tests_skipped_errno(r, "cannot start dhcp server(bound to interface)");
+
+ r = test_basic(false);
+ if (r < 0)
+ return log_tests_skipped_errno(r, "cannot start dhcp server(non-bound to interface)");
+
+ test_message_handler();
+
+ return 0;
+}