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Diffstat (limited to '')
| -rw-r--r-- | src/libsystemd-network/test-dhcp-server.c | 322 |
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; +} |