libsystemd-dhcp: revert merge into libsystemd

Unlike the other merged libs, the rest of libsystemd will never depend on
sd-dhcp-client, so there is no reason not to keep it separate.

1 files changed, 243 insertions, 0 deletions

diff --git a/src/libsystemd-dhcp/test-dhcp-client.c b/src/libsystemd-dhcp/test-dhcp-client.c
new file mode 100644
index 0000000000..56a10b3dfc
--- /dev/null
+++ b/src/libsystemd-dhcp/test-dhcp-client.c
@@ -0,0 +1,243 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2013 Intel Corporation. All rights reserved.
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdlib.h>
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include "util.h"
+#include "socket-util.h"
+
+#include "dhcp-protocol.h"
+#include "dhcp-internal.h"
+#include "sd-dhcp-client.h"
+
+static struct ether_addr mac_addr = {
+        .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
+};
+
+static int test_fd[2];
+
+static void test_request_basic(sd_event *e)
+{
+        int r;
+
+        sd_dhcp_client *client;
+
+        r = sd_dhcp_client_new(&client);
+
+        assert(r >= 0);
+        assert(client);
+
+        r = sd_dhcp_client_attach_event(client, e, 0);
+        assert(r >= 0);
+
+        assert(sd_dhcp_client_set_request_option(NULL, 0) == -EINVAL);
+        assert(sd_dhcp_client_set_request_address(NULL, NULL) == -EINVAL);
+        assert(sd_dhcp_client_set_index(NULL, 0) == -EINVAL);
+
+        assert(sd_dhcp_client_set_index(client, 15) == 0);
+        assert(sd_dhcp_client_set_index(client, -42) == -EINVAL);
+        assert(sd_dhcp_client_set_index(client, -1) == 0);
+
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_SUBNET_MASK) == -EEXIST);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_ROUTER) == -EEXIST);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_HOST_NAME) == -EEXIST);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_DOMAIN_NAME) == -EEXIST);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_DOMAIN_NAME_SERVER)
+                        == -EEXIST);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_NTP_SERVER) == -EEXIST);
+
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_PAD) == -EINVAL);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_END) == -EINVAL);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_MESSAGE_TYPE) == -EINVAL);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_OVERLOAD) == -EINVAL);
+        assert(sd_dhcp_client_set_request_option(client,
+                                        DHCP_OPTION_PARAMETER_REQUEST_LIST)
+                        == -EINVAL);
+
+        assert(sd_dhcp_client_set_request_option(client, 33) == 0);
+        assert(sd_dhcp_client_set_request_option(client, 33) == -EEXIST);
+        assert(sd_dhcp_client_set_request_option(client, 44) == 0);
+        assert(sd_dhcp_client_set_request_option(client, 33) == -EEXIST);
+}
+
+static uint16_t client_checksum(void *buf, int len)
+{
+        uint32_t sum;
+        uint16_t *check;
+        int i;
+        uint8_t *odd;
+
+        sum = 0;
+        check = buf;
+
+        for (i = 0; i < len / 2 ; i++)
+                sum += check[i];
+
+        if (len & 0x01) {
+                odd = buf;
+                sum += odd[len - 1];
+        }
+
+        while (sum >> 16)
+                sum = (sum & 0xffff) + (sum >> 16);
+
+        return ~sum;
+}
+
+static void test_checksum(void)
+{
+        uint8_t buf[20] = {
+                0x45, 0x00, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
+                0x40, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                0xff, 0xff, 0xff, 0xff
+        };
+
+        assert(client_checksum(&buf, 20) == be16toh(0x78ae));
+}
+
+static int check_options(uint8_t code, uint8_t len, const uint8_t *option,
+                void *user_data)
+{
+        return 0;
+}
+
+int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
+                                 const void *packet, size_t len)
+{
+        size_t size;
+        _cleanup_free_ DHCPPacket *discover;
+        uint16_t ip_check, udp_check;
+        int res;
+
+        assert(s >= 0);
+        assert(packet);
+
+        size = sizeof(DHCPPacket) + 4;
+        assert(len > size);
+
+        discover = memdup(packet, len);
+
+        assert(memcmp(discover->dhcp.chaddr,
+                      &mac_addr.ether_addr_octet, 6) == 0);
+        assert(discover->ip.ttl == IPDEFTTL);
+        assert(discover->ip.protocol == IPPROTO_UDP);
+        assert(discover->ip.saddr == INADDR_ANY);
+        assert(discover->ip.daddr == INADDR_BROADCAST);
+        assert(discover->udp.source == be16toh(DHCP_PORT_CLIENT));
+        assert(discover->udp.dest == be16toh(DHCP_PORT_SERVER));
+
+        ip_check = discover->ip.check;
+
+        discover->ip.ttl = 0;
+        discover->ip.check = discover->udp.len;
+
+        udp_check = ~client_checksum(&discover->ip.ttl, len - 8);
+        assert(udp_check == 0xffff);
+
+        discover->ip.ttl = IPDEFTTL;
+        discover->ip.check = ip_check;
+
+        ip_check = ~client_checksum(&discover->ip, sizeof(discover->ip));
+        assert(ip_check == 0xffff);
+
+        size = len - sizeof(struct iphdr) - sizeof(struct udphdr);
+
+        res = dhcp_option_parse(&discover->dhcp, size, check_options, NULL);
+        if (res < 0)
+                return res;
+
+        return 575;
+}
+
+int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link)
+{
+        if (socketpair(AF_UNIX, SOCK_STREAM, 0, test_fd) < 0)
+                return -errno;
+
+        return test_fd[0];
+}
+
+int dhcp_network_bind_udp_socket(int index, be32_t client_address)
+{
+        return 0;
+}
+
+int dhcp_network_send_udp_socket(int s, be32_t server_address,
+                                 const void *packet, size_t len)
+{
+        return 0;
+}
+
+static void test_discover_message(sd_event *e)
+{
+        sd_dhcp_client *client;
+        int res, r;
+
+        r = sd_dhcp_client_new(&client);
+        assert(r >= 0);
+        assert(client);
+
+        r = sd_dhcp_client_attach_event(client, e, 0);
+        assert(r >= 0);
+
+        assert(sd_dhcp_client_set_index(client, 42) >= 0);
+        assert(sd_dhcp_client_set_mac(client, &mac_addr) >= 0);
+
+        assert(sd_dhcp_client_set_request_option(client, 248) >= 0);
+
+        res = sd_dhcp_client_start(client);
+
+        assert(res == 0 || res == -EINPROGRESS);
+
+        close(test_fd[0]);
+        close(test_fd[1]);
+}
+
+int main(int argc, char *argv[])
+{
+        sd_event *e;
+
+        assert(sd_event_new(&e) >= 0);
+
+        test_request_basic(e);
+        test_checksum();
+
+        test_discover_message(e);
+        sd_event_run(e, (uint64_t) -1);
+
+        return 0;
+}