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https://github.com/systemd/systemd.git
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libsystemd-dhcp: Add a full DHCP address acquisition test case
Upon startup the DHCP library will immediately send a DHCP Discover. Handle the additional DHCP Discover checking and DHCP Offer sending in test_addr_acq_recv_discover(). Write a zero UDP checksum, the received XID and the faked MAC address into place to create a DHCP message the library can accept. Follow exactly the same steps when receiving a DHCP Request in test_addr_acq_recv_request() and send the Ack. Check that the proper addresses have been found by the DHCP library before exiting the main loop and finishing the test.
This commit is contained in:
Patrik Flykt
Tom Gundersen
parent
6c8a0f07f2
commit
234ed3eb09
@ -43,6 +43,7 @@ typedef int (*test_callback_recv_t)(size_t size, DHCPMessage *dhcp);
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static bool verbose = false;
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static int test_fd[2];
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static test_callback_recv_t callback_recv;
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static be32_t xid;
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static void test_request_basic(sd_event *e)
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{
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@ -262,6 +263,223 @@ static void test_discover_message(sd_event *e)
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callback_recv = NULL;
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}
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static uint8_t test_addr_acq_offer[] = {
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0x45, 0x10, 0x01, 0x48, 0x00, 0x00, 0x00, 0x00,
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0x80, 0x11, 0xb3, 0x84, 0xc0, 0xa8, 0x02, 0x01,
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0xc0, 0xa8, 0x02, 0xbf, 0x00, 0x43, 0x00, 0x44,
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0x01, 0x34, 0x00, 0x00, 0x02, 0x01, 0x06, 0x00,
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0x6f, 0x95, 0x2f, 0x30, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0xc0, 0xa8, 0x02, 0xbf,
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0xc0, 0xa8, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x63, 0x82, 0x53, 0x63, 0x35, 0x01, 0x02, 0x36,
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0x04, 0xc0, 0xa8, 0x02, 0x01, 0x33, 0x04, 0x00,
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0x00, 0x02, 0x58, 0x01, 0x04, 0xff, 0xff, 0xff,
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0x00, 0x2a, 0x04, 0xc0, 0xa8, 0x02, 0x01, 0x0f,
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0x09, 0x6c, 0x61, 0x62, 0x2e, 0x69, 0x6e, 0x74,
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0x72, 0x61, 0x03, 0x04, 0xc0, 0xa8, 0x02, 0x01,
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0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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static uint8_t test_addr_acq_ack[] = {
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0x45, 0x10, 0x01, 0x48, 0x00, 0x00, 0x00, 0x00,
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0x80, 0x11, 0xb3, 0x84, 0xc0, 0xa8, 0x02, 0x01,
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0xc0, 0xa8, 0x02, 0xbf, 0x00, 0x43, 0x00, 0x44,
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0x01, 0x34, 0x00, 0x00, 0x02, 0x01, 0x06, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0xc0, 0xa8, 0x02, 0xbf,
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0xc0, 0xa8, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x63, 0x82, 0x53, 0x63, 0x35, 0x01, 0x05, 0x36,
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0x04, 0xc0, 0xa8, 0x02, 0x01, 0x33, 0x04, 0x00,
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0x00, 0x02, 0x58, 0x01, 0x04, 0xff, 0xff, 0xff,
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0x00, 0x2a, 0x04, 0xc0, 0xa8, 0x02, 0x01, 0x0f,
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0x09, 0x6c, 0x61, 0x62, 0x2e, 0x69, 0x6e, 0x74,
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0x72, 0x61, 0x03, 0x04, 0xc0, 0xa8, 0x02, 0x01,
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0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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static void test_addr_acq_acquired(sd_dhcp_client *client, int event,
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void *userdata)
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{
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sd_event *e = userdata;
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sd_dhcp_lease *lease;
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struct in_addr addr;
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assert(client);
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assert(event == DHCP_EVENT_IP_ACQUIRE);
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assert(sd_dhcp_client_get_lease(client, &lease) >= 0);
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assert(lease);
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assert(sd_dhcp_lease_get_address(lease, &addr) >= 0);
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assert(memcmp(&addr.s_addr, &test_addr_acq_ack[44],
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sizeof(addr.s_addr)) == 0);
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assert(sd_dhcp_lease_get_netmask(lease, &addr) >= 0);
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assert(memcmp(&addr.s_addr, &test_addr_acq_ack[285],
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sizeof(addr.s_addr)) == 0);
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assert(sd_dhcp_lease_get_router(lease, &addr) >= 0);
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assert(memcmp(&addr.s_addr, &test_addr_acq_ack[308],
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sizeof(addr.s_addr)) == 0);
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if (verbose)
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printf(" DHCP address acquired\n");
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sd_event_exit(e, 0);
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}
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static int test_addr_acq_recv_request(size_t size, DHCPMessage *request)
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{
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uint16_t udp_check = 0;
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int res;
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res = dhcp_option_parse(request, size, check_options, NULL);
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assert(res == DHCP_REQUEST);
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assert(xid == request->xid);
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if (verbose)
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printf(" recv DHCP Request 0x%08x\n", be32toh(xid));
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memcpy(&test_addr_acq_ack[26], &udp_check, sizeof(udp_check));
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memcpy(&test_addr_acq_ack[32], &xid, sizeof(xid));
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memcpy(&test_addr_acq_ack[56], &mac_addr.ether_addr_octet,
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ETHER_ADDR_LEN);
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callback_recv = NULL;
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res = write(test_fd[1], test_addr_acq_ack,
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sizeof(test_addr_acq_ack));
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assert(res == sizeof(test_addr_acq_ack));
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if (verbose)
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printf(" send DHCP Ack\n");
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return 0;
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};
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static int test_addr_acq_recv_discover(size_t size, DHCPMessage *discover)
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{
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uint16_t udp_check = 0;
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int res;
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res = dhcp_option_parse(discover, size, check_options, NULL);
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assert(res == DHCP_DISCOVER);
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xid = discover->xid;
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if (verbose)
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printf(" recv DHCP Discover 0x%08x\n", be32toh(xid));
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memcpy(&test_addr_acq_offer[26], &udp_check, sizeof(udp_check));
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memcpy(&test_addr_acq_offer[32], &xid, sizeof(xid));
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memcpy(&test_addr_acq_offer[56], &mac_addr.ether_addr_octet,
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ETHER_ADDR_LEN);
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callback_recv = test_addr_acq_recv_request;
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res = write(test_fd[1], test_addr_acq_offer,
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sizeof(test_addr_acq_offer));
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assert(res == sizeof(test_addr_acq_offer));
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if (verbose)
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printf(" send DHCP Offer\n");
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return 0;
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}
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static void test_addr_acq(sd_event *e)
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{
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sd_dhcp_client *client;
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int res, r;
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if (verbose)
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printf("* %s\n", __FUNCTION__);
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r = sd_dhcp_client_new(&client);
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assert(r >= 0);
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assert(client);
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r = sd_dhcp_client_attach_event(client, e, 0);
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assert(r >= 0);
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assert(sd_dhcp_client_set_index(client, 42) >= 0);
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assert(sd_dhcp_client_set_mac(client, &mac_addr) >= 0);
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assert(sd_dhcp_client_set_callback(client, test_addr_acq_acquired, e)
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>= 0);
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callback_recv = test_addr_acq_recv_discover;
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res = sd_dhcp_client_start(client);
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assert(res == 0 || res == -EINPROGRESS);
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sd_event_loop(e);
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sd_dhcp_client_set_callback(client, NULL, NULL);
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sd_dhcp_client_stop(client);
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sd_dhcp_client_free(client);
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close(test_fd[0]);
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close(test_fd[1]);
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callback_recv = NULL;
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xid = 0;
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}
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int main(int argc, char *argv[])
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{
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sd_event *e;
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@ -272,6 +490,7 @@ int main(int argc, char *argv[])
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test_checksum();
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test_discover_message(e);
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test_addr_acq(e);
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return 0;
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}
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