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l---------src/libsystemd-dhcp/Makefile1
-rw-r--r--src/libsystemd-dhcp/dhcp-internal.h44
-rw-r--r--src/libsystemd-dhcp/dhcp-network.c106
-rw-r--r--src/libsystemd-dhcp/dhcp-option.c184
-rw-r--r--src/libsystemd-dhcp/dhcp-protocol.h120
-rw-r--r--src/libsystemd-dhcp/sd-dhcp-client.c1254
-rw-r--r--src/libsystemd-dhcp/test-dhcp-client.c243
-rw-r--r--src/libsystemd-dhcp/test-dhcp-option.c378
8 files changed, 2330 insertions, 0 deletions
diff --git a/src/libsystemd-dhcp/Makefile b/src/libsystemd-dhcp/Makefile
new file mode 120000
index 0000000000..d0b0e8e008
--- /dev/null
+++ b/src/libsystemd-dhcp/Makefile
@@ -0,0 +1 @@
+../Makefile \ No newline at end of file
diff --git a/src/libsystemd-dhcp/dhcp-internal.h b/src/libsystemd-dhcp/dhcp-internal.h
new file mode 100644
index 0000000000..43b5b1d000
--- /dev/null
+++ b/src/libsystemd-dhcp/dhcp-internal.h
@@ -0,0 +1,44 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ 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 <stdint.h>
+#include <linux/if_packet.h>
+
+#include "socket-util.h"
+
+#include "dhcp-protocol.h"
+
+int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link);
+int dhcp_network_bind_udp_socket(int index, be32_t client_address);
+int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
+ const void *packet, size_t len);
+int dhcp_network_send_udp_socket(int s, be32_t server_address,
+ const void *packet, size_t len);
+
+int dhcp_option_append(uint8_t **buf, size_t *buflen, uint8_t code,
+ size_t optlen, const void *optval);
+
+typedef int (*dhcp_option_cb_t)(uint8_t code, uint8_t len,
+ const uint8_t *option, void *user_data);
+int dhcp_option_parse(DHCPMessage *message, size_t len,
+ dhcp_option_cb_t cb, void *user_data);
diff --git a/src/libsystemd-dhcp/dhcp-network.c b/src/libsystemd-dhcp/dhcp-network.c
new file mode 100644
index 0000000000..b2de67e8a7
--- /dev/null
+++ b/src/libsystemd-dhcp/dhcp-network.c
@@ -0,0 +1,106 @@
+/***
+ 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 <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <linux/if_packet.h>
+#include <net/ethernet.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "socket-util.h"
+
+#include "dhcp-internal.h"
+
+int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link)
+{
+ int s;
+
+ assert(index > 0);
+ assert(link);
+
+ s = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
+ htons(ETH_P_IP));
+ if (s < 0)
+ return -errno;
+
+ link->ll.sll_family = AF_PACKET;
+ link->ll.sll_protocol = htons(ETH_P_IP);
+ link->ll.sll_ifindex = index;
+ link->ll.sll_halen = ETH_ALEN;
+ memset(link->ll.sll_addr, 0xff, ETH_ALEN);
+
+ if (bind(s, &link->sa, sizeof(link->ll)) < 0) {
+ close_nointr_nofail(s);
+ return -errno;
+ }
+
+ return s;
+}
+
+int dhcp_network_bind_udp_socket(int index, be32_t client_address)
+{
+ int s;
+ union sockaddr_union src = {
+ .in.sin_family = AF_INET,
+ .in.sin_port = htobe16(DHCP_PORT_CLIENT),
+ .in.sin_addr.s_addr = client_address,
+ };
+
+ s = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0);
+ if (s < 0)
+ return -errno;
+
+ if (bind(s, &src.sa, sizeof(src.in)) < 0) {
+ close_nointr_nofail(s);
+ return -errno;
+ }
+
+ return s;
+}
+
+int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
+ const void *packet, size_t len)
+{
+ assert(link);
+ assert(packet);
+ assert(len);
+
+ if (sendto(s, packet, len, 0, &link->sa, sizeof(link->ll)) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int dhcp_network_send_udp_socket(int s, be32_t server_address,
+ const void *packet, size_t len)
+{
+ union sockaddr_union dest = {
+ .in.sin_family = AF_INET,
+ .in.sin_port = htobe16(DHCP_PORT_SERVER),
+ .in.sin_addr.s_addr = server_address,
+ };
+
+ if (sendto(s, packet, len, 0, &dest.sa, sizeof(dest.in)) < 0)
+ return -errno;
+
+ return 0;
+}
diff --git a/src/libsystemd-dhcp/dhcp-option.c b/src/libsystemd-dhcp/dhcp-option.c
new file mode 100644
index 0000000000..4d45b3b3a4
--- /dev/null
+++ b/src/libsystemd-dhcp/dhcp-option.c
@@ -0,0 +1,184 @@
+/*-*- 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 <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+
+#include "dhcp-internal.h"
+
+int dhcp_option_append(uint8_t **buf, size_t *buflen, uint8_t code,
+ size_t optlen, const void *optval)
+{
+ if (!buf || !buflen)
+ return -EINVAL;
+
+ switch (code) {
+
+ case DHCP_OPTION_PAD:
+ case DHCP_OPTION_END:
+ if (*buflen < 1)
+ return -ENOBUFS;
+
+ (*buf)[0] = code;
+ *buf += 1;
+ *buflen -= 1;
+ break;
+
+ default:
+ if (*buflen < optlen + 2)
+ return -ENOBUFS;
+
+ if (!optval)
+ return -EINVAL;
+
+ (*buf)[0] = code;
+ (*buf)[1] = optlen;
+ memcpy(&(*buf)[2], optval, optlen);
+
+ *buf += optlen + 2;
+ *buflen -= (optlen + 2);
+
+ break;
+ }
+
+ return 0;
+}
+
+static int parse_options(const uint8_t *buf, size_t buflen, uint8_t *overload,
+ uint8_t *message_type, dhcp_option_cb_t cb,
+ void *user_data)
+{
+ const uint8_t *code = buf;
+ const uint8_t *len;
+
+ while (buflen > 0) {
+ switch (*code) {
+ case DHCP_OPTION_PAD:
+ buflen -= 1;
+ code++;
+ break;
+
+ case DHCP_OPTION_END:
+ return 0;
+
+ case DHCP_OPTION_MESSAGE_TYPE:
+ if (buflen < 3)
+ return -ENOBUFS;
+ buflen -= 3;
+
+ len = code + 1;
+ if (*len != 1)
+ return -EINVAL;
+
+ if (message_type)
+ *message_type = *(len + 1);
+
+ code += 3;
+
+ break;
+
+ case DHCP_OPTION_OVERLOAD:
+ if (buflen < 3)
+ return -ENOBUFS;
+ buflen -= 3;
+
+ len = code + 1;
+ if (*len != 1)
+ return -EINVAL;
+
+ if (overload)
+ *overload = *(len + 1);
+
+ code += 3;
+
+ break;
+
+ default:
+ if (buflen < 3)
+ return -ENOBUFS;
+
+ len = code + 1;
+
+ if (buflen < (size_t)*len + 2)
+ return -EINVAL;
+ buflen -= *len + 2;
+
+ if (cb)
+ cb(*code, *len, len + 1, user_data);
+
+ code += *len + 2;
+
+ break;
+ }
+ }
+
+ if (buflen)
+ return -EINVAL;
+
+ return 0;
+}
+
+int dhcp_option_parse(DHCPMessage *message, size_t len,
+ dhcp_option_cb_t cb, void *user_data)
+{
+ uint8_t overload = 0;
+ uint8_t message_type = 0;
+ uint8_t *opt = (uint8_t *)(message + 1);
+ int res;
+
+ if (!message)
+ return -EINVAL;
+
+ if (len < sizeof(DHCPMessage) + 4)
+ return -EINVAL;
+
+ len -= sizeof(DHCPMessage) + 4;
+
+ if (opt[0] != 0x63 && opt[1] != 0x82 && opt[2] != 0x53 &&
+ opt[3] != 0x63)
+ return -EINVAL;
+
+ res = parse_options(&opt[4], len, &overload, &message_type,
+ cb, user_data);
+ if (res < 0)
+ return res;
+
+ if (overload & DHCP_OVERLOAD_FILE) {
+ res = parse_options(message->file, sizeof(message->file),
+ NULL, &message_type, cb, user_data);
+ if (res < 0)
+ return res;
+ }
+
+ if (overload & DHCP_OVERLOAD_SNAME) {
+ res = parse_options(message->sname, sizeof(message->sname),
+ NULL, &message_type, cb, user_data);
+ if (res < 0)
+ return res;
+ }
+
+ if (message_type)
+ return message_type;
+
+ return -ENOMSG;
+}
diff --git a/src/libsystemd-dhcp/dhcp-protocol.h b/src/libsystemd-dhcp/dhcp-protocol.h
new file mode 100644
index 0000000000..abdfe8d54b
--- /dev/null
+++ b/src/libsystemd-dhcp/dhcp-protocol.h
@@ -0,0 +1,120 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ 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 <netinet/udp.h>
+#include <netinet/ip.h>
+#include <stdint.h>
+
+#include "macro.h"
+#include "sparse-endian.h"
+
+struct DHCPMessage {
+ uint8_t op;
+ uint8_t htype;
+ uint8_t hlen;
+ uint8_t hops;
+ be32_t xid;
+ be16_t secs;
+ be16_t flags;
+ be32_t ciaddr;
+ be32_t yiaddr;
+ be32_t siaddr;
+ be32_t giaddr;
+ uint8_t chaddr[16];
+ uint8_t sname[64];
+ uint8_t file[128];
+} _packed_;
+
+typedef struct DHCPMessage DHCPMessage;
+
+struct DHCPPacket {
+ struct iphdr ip;
+ struct udphdr udp;
+ DHCPMessage dhcp;
+} _packed_;
+
+typedef struct DHCPPacket DHCPPacket;
+
+#define DHCP_IP_SIZE (int32_t)(sizeof(struct iphdr))
+#define DHCP_IP_UDP_SIZE (int32_t)(sizeof(struct udphdr) + DHCP_IP_SIZE)
+#define DHCP_MESSAGE_SIZE (int32_t)(sizeof(DHCPMessage))
+
+enum {
+ DHCP_PORT_SERVER = 67,
+ DHCP_PORT_CLIENT = 68,
+};
+
+enum DHCPState {
+ DHCP_STATE_INIT = 0,
+ DHCP_STATE_SELECTING = 1,
+ DHCP_STATE_INIT_REBOOT = 2,
+ DHCP_STATE_REBOOTING = 3,
+ DHCP_STATE_REQUESTING = 4,
+ DHCP_STATE_BOUND = 5,
+ DHCP_STATE_RENEWING = 6,
+ DHCP_STATE_REBINDING = 7,
+};
+
+typedef enum DHCPState DHCPState;
+
+enum {
+ BOOTREQUEST = 1,
+ BOOTREPLY = 2,
+};
+
+enum {
+ DHCP_DISCOVER = 1,
+ DHCP_OFFER = 2,
+ DHCP_REQUEST = 3,
+ DHCP_DECLINE = 4,
+ DHCP_ACK = 5,
+ DHCP_NAK = 6,
+ DHCP_RELEASE = 7,
+};
+
+enum {
+ DHCP_OVERLOAD_FILE = 1,
+ DHCP_OVERLOAD_SNAME = 2,
+};
+
+enum {
+ DHCP_OPTION_PAD = 0,
+ DHCP_OPTION_SUBNET_MASK = 1,
+ DHCP_OPTION_ROUTER = 3,
+ DHCP_OPTION_DOMAIN_NAME_SERVER = 6,
+ DHCP_OPTION_HOST_NAME = 12,
+ DHCP_OPTION_DOMAIN_NAME = 15,
+ DHCP_OPTION_INTERFACE_MTU = 26,
+ DHCP_OPTION_NTP_SERVER = 42,
+ DHCP_OPTION_REQUESTED_IP_ADDRESS = 50,
+ DHCP_OPTION_IP_ADDRESS_LEASE_TIME = 51,
+ DHCP_OPTION_OVERLOAD = 52,
+ DHCP_OPTION_MESSAGE_TYPE = 53,
+ DHCP_OPTION_SERVER_IDENTIFIER = 54,
+ DHCP_OPTION_PARAMETER_REQUEST_LIST = 55,
+ DHCP_OPTION_MAXIMUM_MESSAGE_SIZE = 57,
+ DHCP_OPTION_RENEWAL_T1_TIME = 58,
+ DHCP_OPTION_REBINDING_T2_TIME = 59,
+ DHCP_OPTION_CLIENT_IDENTIFIER = 61,
+ DHCP_OPTION_END = 255,
+};
diff --git a/src/libsystemd-dhcp/sd-dhcp-client.c b/src/libsystemd-dhcp/sd-dhcp-client.c
new file mode 100644
index 0000000000..3b7b9f4ccd
--- /dev/null
+++ b/src/libsystemd-dhcp/sd-dhcp-client.c
@@ -0,0 +1,1254 @@
+/***
+ 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 <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <net/ethernet.h>
+#include <sys/param.h>
+
+#include "util.h"
+#include "list.h"
+
+#include "dhcp-protocol.h"
+#include "dhcp-internal.h"
+#include "sd-dhcp-client.h"
+
+#define DHCP_CLIENT_MIN_OPTIONS_SIZE 312
+
+#define client_state_machine_check(s, r) \
+ do { \
+ if (s != DHCP_STATE_BOUND && \
+ s != DHCP_STATE_RENEWING && \
+ s != DHCP_STATE_REBINDING) { \
+ return (r); \
+ } \
+ } while (false)
+
+struct DHCPLease {
+ uint32_t t1;
+ uint32_t t2;
+ uint32_t lifetime;
+ be32_t address;
+ be32_t server_address;
+ be32_t subnet_mask;
+ be32_t router;
+ struct in_addr *dns;
+ size_t dns_size;
+ uint16_t mtu;
+ char *domainname;
+ char *hostname;
+};
+
+typedef struct DHCPLease DHCPLease;
+
+struct sd_dhcp_client {
+ DHCPState state;
+ sd_event *event;
+ int event_priority;
+ sd_event_source *timeout_resend;
+ int index;
+ int fd;
+ union sockaddr_union link;
+ sd_event_source *receive_message;
+ uint8_t *req_opts;
+ size_t req_opts_allocated;
+ size_t req_opts_size;
+ be32_t last_addr;
+ struct ether_addr mac_addr;
+ uint32_t xid;
+ usec_t start_time;
+ unsigned int attempt;
+ usec_t request_sent;
+ sd_event_source *timeout_t1;
+ sd_event_source *timeout_t2;
+ sd_event_source *timeout_expire;
+ sd_dhcp_client_cb_t cb;
+ void *userdata;
+ DHCPLease *lease;
+};
+
+static const uint8_t default_req_opts[] = {
+ DHCP_OPTION_SUBNET_MASK,
+ DHCP_OPTION_ROUTER,
+ DHCP_OPTION_HOST_NAME,
+ DHCP_OPTION_DOMAIN_NAME,
+ DHCP_OPTION_DOMAIN_NAME_SERVER,
+ DHCP_OPTION_NTP_SERVER,
+};
+
+static int client_receive_message(sd_event_source *s, int fd,
+ uint32_t revents, void *userdata);
+
+int sd_dhcp_client_set_callback(sd_dhcp_client *client, sd_dhcp_client_cb_t cb,
+ void *userdata) {
+ assert_return(client, -EINVAL);
+
+ client->cb = cb;
+ client->userdata = userdata;
+
+ return 0;
+}
+
+int sd_dhcp_client_set_request_option(sd_dhcp_client *client, uint8_t option) {
+ size_t i;
+
+ assert_return(client, -EINVAL);
+ assert_return (client->state == DHCP_STATE_INIT, -EBUSY);
+
+ switch(option) {
+ case DHCP_OPTION_PAD:
+ case DHCP_OPTION_OVERLOAD:
+ case DHCP_OPTION_MESSAGE_TYPE:
+ case DHCP_OPTION_PARAMETER_REQUEST_LIST:
+ case DHCP_OPTION_END:
+ return -EINVAL;
+
+ default:
+ break;
+ }
+
+ for (i = 0; i < client->req_opts_size; i++)
+ if (client->req_opts[i] == option)
+ return -EEXIST;
+
+ if (!GREEDY_REALLOC(client->req_opts, client->req_opts_allocated,
+ client->req_opts_size + 1))
+ return -ENOMEM;
+
+ client->req_opts[client->req_opts_size++] = option;
+
+ return 0;
+}
+
+int sd_dhcp_client_set_request_address(sd_dhcp_client *client,
+ const struct in_addr *last_addr) {
+ assert_return(client, -EINVAL);
+ assert_return(client->state == DHCP_STATE_INIT, -EBUSY);
+
+ if (last_addr)
+ client->last_addr = last_addr->s_addr;
+ else
+ client->last_addr = INADDR_ANY;
+
+ return 0;
+}
+
+int sd_dhcp_client_set_index(sd_dhcp_client *client, int interface_index) {
+ assert_return(client, -EINVAL);
+ assert_return(client->state == DHCP_STATE_INIT, -EBUSY);
+ assert_return(interface_index >= -1, -EINVAL);
+
+ client->index = interface_index;
+
+ return 0;
+}
+
+int sd_dhcp_client_set_mac(sd_dhcp_client *client,
+ const struct ether_addr *addr) {
+ assert_return(client, -EINVAL);
+ assert_return(client->state == DHCP_STATE_INIT, -EBUSY);
+
+ memcpy(&client->mac_addr, addr, ETH_ALEN);
+
+ return 0;
+}
+
+int sd_dhcp_client_get_address(sd_dhcp_client *client, struct in_addr *addr) {
+ assert_return(client, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ client_state_machine_check (client->state, -EADDRNOTAVAIL);
+
+ addr->s_addr = client->lease->address;
+
+ return 0;
+}
+
+int sd_dhcp_client_get_mtu(sd_dhcp_client *client, uint16_t *mtu) {
+ assert_return(client, -EINVAL);
+ assert_return(mtu, -EINVAL);
+
+ client_state_machine_check (client->state, -EADDRNOTAVAIL);
+
+ if (client->lease->mtu)
+ *mtu = client->lease->mtu;
+ else
+ return -ENOENT;
+
+ return 0;
+}
+
+int sd_dhcp_client_get_dns(sd_dhcp_client *client, struct in_addr **addr, size_t *addr_size) {
+ assert_return(client, -EINVAL);
+ assert_return(addr, -EINVAL);
+ assert_return(addr_size, -EINVAL);
+
+ client_state_machine_check (client->state, -EADDRNOTAVAIL);
+
+ if (client->lease->dns_size) {
+ *addr_size = client->lease->dns_size;
+ *addr = client->lease->dns;
+ } else
+ return -ENOENT;
+
+ return 0;
+}
+
+int sd_dhcp_client_get_domainname(sd_dhcp_client *client, const char **domainname) {
+ assert_return(client, -EINVAL);
+ assert_return(domainname, -EINVAL);
+
+ client_state_machine_check (client->state, -EADDRNOTAVAIL);
+
+ if (client->lease->domainname)
+ *domainname = client->lease->domainname;
+ else
+ return -ENOENT;
+
+ return 0;
+}
+
+int sd_dhcp_client_get_hostname(sd_dhcp_client *client, const char **hostname) {
+ assert_return(client, -EINVAL);
+ assert_return(hostname, -EINVAL);
+
+ client_state_machine_check (client->state, -EADDRNOTAVAIL);
+
+ if (client->lease->hostname)
+ *hostname = client->lease->hostname;
+ else
+ return -ENOENT;
+
+ return 0;
+}
+
+int sd_dhcp_client_prefixlen(const struct in_addr *addr) {
+ int len = 0;
+ uint32_t mask;
+
+ assert_return(addr, -EADDRNOTAVAIL);
+
+ mask = be32toh(addr->s_addr);
+ while (mask) {
+ len++;
+ mask = mask << 1;
+ }
+
+ return len;
+}
+
+int sd_dhcp_client_get_router(sd_dhcp_client *client, struct in_addr *addr) {
+ assert_return(client, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ client_state_machine_check (client->state, -EADDRNOTAVAIL);
+
+ addr->s_addr = client->lease->router;
+
+ return 0;
+}
+
+int sd_dhcp_client_get_netmask(sd_dhcp_client *client, struct in_addr *addr) {
+ assert_return(client, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ client_state_machine_check (client->state, -EADDRNOTAVAIL);
+
+ addr->s_addr = client->lease->subnet_mask;
+
+ return 0;
+}
+
+static int client_notify(sd_dhcp_client *client, int event) {
+ if (client->cb)
+ client->cb(client, event, client->userdata);
+
+ return 0;
+}
+
+static void lease_free(DHCPLease *lease) {
+ if (!lease)
+ return;
+
+ free(lease->hostname);
+ free(lease->domainname);
+ free(lease->dns);
+ free(lease);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(DHCPLease*, lease_free);
+#define _cleanup_lease_free_ _cleanup_(lease_freep)
+
+static int client_stop(sd_dhcp_client *client, int error) {
+ assert_return(client, -EINVAL);
+
+ client->receive_message =
+ sd_event_source_unref(client->receive_message);
+
+ if (client->fd >= 0)
+ close(client->fd);
+ client->fd = -1;
+
+ client->timeout_resend = sd_event_source_unref(client->timeout_resend);
+
+ client->timeout_t1 = sd_event_source_unref(client->timeout_t1);
+ client->timeout_t2 = sd_event_source_unref(client->timeout_t2);
+ client->timeout_expire = sd_event_source_unref(client->timeout_expire);
+
+ client->attempt = 1;
+
+ client_notify(client, error);
+
+ switch (client->state) {
+
+ case DHCP_STATE_INIT:
+ case DHCP_STATE_SELECTING:
+ case DHCP_STATE_REQUESTING:
+ case DHCP_STATE_BOUND:
+
+ client->start_time = 0;
+ client->state = DHCP_STATE_INIT;
+ break;
+
+ case DHCP_STATE_INIT_REBOOT:
+ case DHCP_STATE_REBOOTING:
+ case DHCP_STATE_RENEWING:
+ case DHCP_STATE_REBINDING:
+
+ break;
+ }
+
+ if (client->lease) {
+ lease_free(client->lease);
+ client->lease = NULL;
+ }
+
+ return 0;
+}
+
+static int client_packet_init(sd_dhcp_client *client, uint8_t type,
+ DHCPMessage *message, uint16_t secs,
+ uint8_t **opt, size_t *optlen) {
+ int err;
+ be16_t max_size;
+
+ *opt = (uint8_t *)(message + 1);
+
+ if (*optlen < 4)
+ return -ENOBUFS;
+ *optlen -= 4;
+
+ message->op = BOOTREQUEST;
+ message->htype = 1;
+ message->hlen = ETHER_ADDR_LEN;
+ message->xid = htobe32(client->xid);
+
+ /* Although 'secs' field is a SHOULD in RFC 2131, certain DHCP servers
+ refuse to issue an DHCP lease if 'secs' is set to zero */
+ message->secs = htobe16(secs);
+
+ if (client->state == DHCP_STATE_RENEWING ||
+ client->state == DHCP_STATE_REBINDING)
+ message->ciaddr = client->lease->address;
+
+ memcpy(&message->chaddr, &client->mac_addr, ETH_ALEN);
+ (*opt)[0] = 0x63;
+ (*opt)[1] = 0x82;
+ (*opt)[2] = 0x53;
+ (*opt)[3] = 0x63;
+
+ *opt += 4;
+
+ err = dhcp_option_append(opt, optlen, DHCP_OPTION_MESSAGE_TYPE, 1,
+ &type);
+ if (err < 0)
+ return err;
+
+ /* Some DHCP servers will refuse to issue an DHCP lease if the Cliient
+ Identifier option is not set */
+ err = dhcp_option_append(opt, optlen, DHCP_OPTION_CLIENT_IDENTIFIER,
+ ETH_ALEN, &client->mac_addr);
+ if (err < 0)
+ return err;
+
+ if (type == DHCP_DISCOVER || type == DHCP_REQUEST) {
+ err = dhcp_option_append(opt, optlen,
+ DHCP_OPTION_PARAMETER_REQUEST_LIST,
+ client->req_opts_size,
+ client->req_opts);
+ if (err < 0)
+ return err;
+
+ /* Some DHCP servers will send bigger DHCP packets than the
+ defined default size unless the Maximum Messge Size option
+ is explicitely set */
+ max_size = htobe16(DHCP_IP_UDP_SIZE + DHCP_MESSAGE_SIZE +
+ DHCP_CLIENT_MIN_OPTIONS_SIZE);
+ err = dhcp_option_append(opt, optlen,
+ DHCP_OPTION_MAXIMUM_MESSAGE_SIZE,
+ 2, &max_size);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+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 client_append_ip_headers(DHCPPacket *packet, uint16_t len) {
+ packet->ip.version = IPVERSION;
+ packet->ip.ihl = DHCP_IP_SIZE / 4;
+ packet->ip.tot_len = htobe16(len);
+
+ packet->ip.protocol = IPPROTO_UDP;
+ packet->ip.saddr = INADDR_ANY;
+ packet->ip.daddr = INADDR_BROADCAST;
+
+ packet->udp.source = htobe16(DHCP_PORT_CLIENT);
+ packet->udp.dest = htobe16(DHCP_PORT_SERVER);
+ packet->udp.len = htobe16(len - DHCP_IP_SIZE);
+
+ packet->ip.check = packet->udp.len;
+ packet->udp.check = client_checksum(&packet->ip.ttl, len - 8);
+
+ packet->ip.ttl = IPDEFTTL;
+ packet->ip.check = 0;
+ packet->ip.check = client_checksum(&packet->ip, DHCP_IP_SIZE);
+}
+
+static int client_send_discover(sd_dhcp_client *client, uint16_t secs) {
+ int err = 0;
+ _cleanup_free_ DHCPPacket *discover;
+ size_t optlen, len;
+ uint8_t *opt;
+
+ optlen = DHCP_CLIENT_MIN_OPTIONS_SIZE;
+ len = sizeof(DHCPPacket) + optlen;
+
+ discover = malloc0(len);
+
+ if (!discover)
+ return -ENOMEM;
+
+ err = client_packet_init(client, DHCP_DISCOVER, &discover->dhcp,
+ secs, &opt, &optlen);
+ if (err < 0)
+ return err;
+
+ if (client->last_addr != INADDR_ANY) {
+ err = dhcp_option_append(&opt, &optlen,
+ DHCP_OPTION_REQUESTED_IP_ADDRESS,
+ 4, &client->last_addr);
+ if (err < 0)
+ return err;
+ }
+
+ err = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
+ if (err < 0)
+ return err;
+
+ client_append_ip_headers(discover, len);
+
+ err = dhcp_network_send_raw_socket(client->fd, &client->link,
+ discover, len);
+
+ return err;
+}
+
+static int client_send_request(sd_dhcp_client *client, uint16_t secs) {
+ _cleanup_free_ DHCPPacket *request;
+ size_t optlen, len;
+ int err;
+ uint8_t *opt;
+
+ optlen = DHCP_CLIENT_MIN_OPTIONS_SIZE;
+ len = DHCP_MESSAGE_SIZE + optlen;
+
+ request = malloc0(len);
+ if (!request)
+ return -ENOMEM;
+
+ err = client_packet_init(client, DHCP_REQUEST, &request->dhcp, secs,
+ &opt, &optlen);
+ if (err < 0)
+ return err;
+
+ if (client->state == DHCP_STATE_REQUESTING) {
+ err = dhcp_option_append(&opt, &optlen,
+ DHCP_OPTION_REQUESTED_IP_ADDRESS,
+ 4, &client->lease->address);
+ if (err < 0)
+ return err;
+
+ err = dhcp_option_append(&opt, &optlen,
+ DHCP_OPTION_SERVER_IDENTIFIER,
+ 4, &client->lease->server_address);
+ if (err < 0)
+ return err;
+ }
+
+ err = dhcp_option_append(&opt, &optlen, DHCP_OPTION_END, 0, NULL);
+ if (err < 0)
+ return err;
+
+ if (client->state == DHCP_STATE_RENEWING) {
+ err = dhcp_network_send_udp_socket(client->fd,
+ client->lease->server_address,
+ &request->dhcp,
+ len - DHCP_IP_UDP_SIZE);
+ } else {
+ client_append_ip_headers(request, len);
+
+ err = dhcp_network_send_raw_socket(client->fd, &client->link,
+ request, len);
+ }
+
+ return err;
+}
+
+static int client_timeout_resend(sd_event_source *s, uint64_t usec,
+ void *userdata) {
+ sd_dhcp_client *client = userdata;
+ usec_t next_timeout = 0;
+ uint32_t time_left;
+ uint16_t secs;
+ int r = 0;
+
+ assert(s);
+ assert(client);
+ assert(client->event);
+
+ switch (client->state) {
+ case DHCP_STATE_RENEWING:
+
+ time_left = (client->lease->t2 - client->lease->t1)/2;
+ if (time_left < 60)
+ time_left = 60;
+
+ next_timeout = usec + time_left * USEC_PER_SEC;
+
+ break;
+
+ case DHCP_STATE_REBINDING:
+
+ time_left = (client->lease->lifetime - client->lease->t2)/2;
+ if (time_left < 60)
+ time_left = 60;
+
+ next_timeout = usec + time_left * USEC_PER_SEC;
+ break;
+
+ case DHCP_STATE_INIT:
+ case DHCP_STATE_INIT_REBOOT:
+ case DHCP_STATE_REBOOTING:
+ case DHCP_STATE_SELECTING:
+ case DHCP_STATE_REQUESTING:
+ case DHCP_STATE_BOUND:
+
+ if (client->attempt < 64)
+ client->attempt *= 2;
+
+ next_timeout = usec + (client->attempt - 1) * USEC_PER_SEC;
+
+ break;
+ }
+
+ next_timeout += (random_u32() & 0x1fffff);
+
+ r = sd_event_add_monotonic(client->event, next_timeout,
+ 10 * USEC_PER_MSEC,
+ client_timeout_resend, client,
+ &client->timeout_resend);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_priority(client->timeout_resend, client->event_priority);
+ if (r < 0)
+ goto error;
+
+ secs = (usec - client->start_time) / USEC_PER_SEC;
+
+ switch (client->state) {
+ case DHCP_STATE_INIT:
+ r = client_send_discover(client, secs);
+ if (r >= 0) {
+ client->state = DHCP_STATE_SELECTING;
+ client->attempt = 1;
+ } else {
+ if (client->attempt >= 64)
+ goto error;
+ }
+
+ break;
+
+ case DHCP_STATE_SELECTING:
+ r = client_send_discover(client, secs);
+ if (r < 0 && client->attempt >= 64)
+ goto error;
+
+ break;
+
+ case DHCP_STATE_REQUESTING:
+ case DHCP_STATE_RENEWING:
+ case DHCP_STATE_REBINDING:
+ r = client_send_request(client, secs);
+ if (r < 0 && client->attempt >= 64)
+ goto error;
+
+ client->request_sent = usec;
+
+ break;
+
+ case DHCP_STATE_INIT_REBOOT:
+ case DHCP_STATE_REBOOTING:
+ case DHCP_STATE_BOUND:
+
+ break;
+ }
+
+ return 0;
+
+error:
+ client_stop(client, r);
+
+ /* Errors were dealt with when stopping the client, don't spill
+ errors into the event loop handler */
+ return 0;
+}
+
+static int client_initialize_events(sd_dhcp_client *client, usec_t usec) {
+ int r;
+
+ assert(client);
+ assert(client->event);
+
+ r = sd_event_add_io(client->event, client->fd, EPOLLIN,
+ client_receive_message, client,
+ &client->receive_message);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_priority(client->receive_message, client->event_priority);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_add_monotonic(client->event, usec, 0,
+ client_timeout_resend, client,
+ &client->timeout_resend);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_priority(client->timeout_resend, client->event_priority);
+
+error:
+ if (r < 0)
+ client_stop(client, r);
+
+ return 0;
+
+}
+
+static int client_timeout_expire(sd_event_source *s, uint64_t usec,
+ void *userdata) {
+ sd_dhcp_client *client = userdata;
+
+ client_stop(client, DHCP_EVENT_EXPIRED);
+
+ return 0;
+}
+
+static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata) {
+ sd_dhcp_client *client = userdata;
+ int r;
+
+ if (client->fd >= 0) {
+ client->receive_message =
+ sd_event_source_unref(client->receive_message);
+ close(client->fd);
+ client->fd = -1;
+ }
+
+ client->state = DHCP_STATE_REBINDING;
+ client->attempt = 1;
+
+ r = dhcp_network_bind_raw_socket(client->index, &client->link);
+ if (r < 0) {
+ client_stop(client, r);
+ return 0;
+ }
+
+ client->fd = r;
+
+ return client_initialize_events(client, usec);
+}
+
+static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata) {
+ sd_dhcp_client *client = userdata;
+ int r;
+
+ client->state = DHCP_STATE_RENEWING;
+ client->attempt = 1;
+
+ r = dhcp_network_bind_udp_socket(client->index,
+ client->lease->address);
+ if (r < 0) {
+ client_stop(client, r);
+ return 0;
+ }
+
+ client->fd = r;
+
+ return client_initialize_events(client, usec);
+}
+
+static int client_parse_offer(uint8_t code, uint8_t len, const uint8_t *option,
+ void *user_data) {
+ DHCPLease *lease = user_data;
+ be32_t val;
+
+ switch(code) {
+
+ case DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
+ if (len == 4) {
+ memcpy(&val, option, 4);
+ lease->lifetime = be32toh(val);
+ }
+
+ break;
+
+ case DHCP_OPTION_SERVER_IDENTIFIER:
+ if (len >= 4)
+ memcpy(&lease->server_address, option, 4);
+
+ break;
+
+ case DHCP_OPTION_SUBNET_MASK:
+ if (len >= 4)
+ memcpy(&lease->subnet_mask, option, 4);
+
+ break;
+
+ case DHCP_OPTION_ROUTER:
+ if (len >= 4)
+ memcpy(&lease->router, option, 4);
+
+ break;
+
+ case DHCP_OPTION_DOMAIN_NAME_SERVER:
+ if (len >= 4) {
+ unsigned i;
+
+ lease->dns_size = len / 4;
+
+ free(lease->dns);
+ lease->dns = new0(struct in_addr, lease->dns_size);
+ if (!lease->dns)
+ return -ENOMEM;
+
+ for (i = 0; i < lease->dns_size; i++) {
+ memcpy(&lease->dns[i].s_addr, option + 4 * i, 4);
+ }
+ }
+
+ break;
+
+ case DHCP_OPTION_INTERFACE_MTU:
+ if (len >= 2) {
+ be16_t mtu;
+
+ memcpy(&mtu, option, 2);
+ lease->mtu = be16toh(mtu);
+
+ if (lease->mtu < 68)
+ lease->mtu = 0;
+ }
+
+ break;
+
+ case DHCP_OPTION_DOMAIN_NAME:
+ if (len >= 1) {
+ free(lease->domainname);
+ lease->domainname = strndup((const char *)option, len);
+ }
+
+ break;
+
+ case DHCP_OPTION_HOST_NAME:
+ if (len >= 1) {
+ free(lease->hostname);
+ lease->hostname = strndup((const char *)option, len);
+ }
+
+ break;
+
+ case DHCP_OPTION_RENEWAL_T1_TIME:
+ if (len == 4) {
+ memcpy(&val, option, 4);
+ lease->t1 = be32toh(val);
+ }
+
+ break;
+
+ case DHCP_OPTION_REBINDING_T2_TIME:
+ if (len == 4) {
+ memcpy(&val, option, 4);
+ lease->t2 = be32toh(val);
+ }
+
+ break;
+ }
+
+ return 0;
+}
+
+static int client_verify_headers(sd_dhcp_client *client, DHCPPacket *message,
+ size_t len) {
+ size_t hdrlen;
+
+ if (len < (DHCP_IP_UDP_SIZE + DHCP_MESSAGE_SIZE))
+ return -EINVAL;
+
+ hdrlen = message->ip.ihl * 4;
+ if (hdrlen < 20 || hdrlen > len || client_checksum(&message->ip,
+ hdrlen))
+ return -EINVAL;
+
+ message->ip.check = message->udp.len;
+ message->ip.ttl = 0;
+
+ if (hdrlen + be16toh(message->udp.len) > len ||
+ client_checksum(&message->ip.ttl, be16toh(message->udp.len) + 12))
+ return -EINVAL;
+
+ if (be16toh(message->udp.source) != DHCP_PORT_SERVER ||
+ be16toh(message->udp.dest) != DHCP_PORT_CLIENT)
+ return -EINVAL;
+
+ if (message->dhcp.op != BOOTREPLY)
+ return -EINVAL;
+
+ if (be32toh(message->dhcp.xid) != client->xid)
+ return -EINVAL;
+
+ if (memcmp(&message->dhcp.chaddr[0], &client->mac_addr.ether_addr_octet,
+ ETHER_ADDR_LEN))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int client_receive_offer(sd_dhcp_client *client, DHCPPacket *offer,
+ size_t len) {
+ _cleanup_lease_free_ DHCPLease *lease = NULL;
+ int r;
+
+ r = client_verify_headers(client, offer, len);
+ if (r < 0)
+ return r;
+
+ lease = new0(DHCPLease, 1);
+ if (!lease)
+ return -ENOMEM;
+
+ len = len - DHCP_IP_UDP_SIZE;
+ r = dhcp_option_parse(&offer->dhcp, len, client_parse_offer,
+ lease);
+ if (r != DHCP_OFFER)
+ return -ENOMSG;
+
+ lease->address = offer->dhcp.yiaddr;
+
+ if (lease->address == INADDR_ANY ||
+ lease->server_address == INADDR_ANY ||
+ lease->subnet_mask == INADDR_ANY ||
+ lease->lifetime == 0)
+ return -ENOMSG;
+
+ client->lease = lease;
+ lease = NULL;
+
+ return 0;
+}
+
+static int client_receive_ack(sd_dhcp_client *client, const uint8_t *buf,
+ size_t len) {
+ DHCPPacket *ack;
+ DHCPMessage *dhcp;
+ _cleanup_lease_free_ DHCPLease *lease = NULL;
+ int r;
+
+ if (client->state == DHCP_STATE_RENEWING) {
+ dhcp = (DHCPMessage *)buf;
+ } else {
+ ack = (DHCPPacket *)buf;
+
+ r = client_verify_headers(client, ack, len);
+ if (r < 0)
+ return r;
+
+ dhcp = &ack->dhcp;
+ len -= DHCP_IP_UDP_SIZE;
+ }
+
+ lease = new0(DHCPLease, 1);
+ if (!lease)
+ return -ENOMEM;
+
+ r = dhcp_option_parse(dhcp, len, client_parse_offer, lease);
+ if (r == DHCP_NAK)
+ return DHCP_EVENT_NO_LEASE;
+
+ if (r != DHCP_ACK)
+ return -ENOMSG;
+
+ lease->address = dhcp->yiaddr;
+
+ if (lease->address == INADDR_ANY ||
+ lease->server_address == INADDR_ANY ||
+ lease->subnet_mask == INADDR_ANY || lease->lifetime == 0)
+ return -ENOMSG;
+
+ r = DHCP_EVENT_IP_ACQUIRE;
+ if (client->lease) {
+ if (client->lease->address != lease->address ||
+ client->lease->subnet_mask != lease->subnet_mask ||
+ client->lease->router != lease->router) {
+ r = DHCP_EVENT_IP_CHANGE;
+ }
+
+ lease_free(client->lease);
+ }
+
+ client->lease = lease;
+ lease = NULL;
+
+ return r;
+}
+
+static uint64_t client_compute_timeout(uint64_t request_sent,
+ uint32_t lifetime) {
+ return request_sent + (lifetime - 3) * USEC_PER_SEC +
+ + (random_u32() & 0x1fffff);
+}
+
+static int client_set_lease_timeouts(sd_dhcp_client *client, uint64_t usec) {
+ uint64_t next_timeout;
+ int r;
+
+ assert(client);
+ assert(client->event);
+
+ if (client->lease->lifetime < 10)
+ return -EINVAL;
+
+ client->timeout_t1 = sd_event_source_unref(client->timeout_t1);
+ client->timeout_t2 = sd_event_source_unref(client->timeout_t2);
+ client->timeout_expire = sd_event_source_unref(client->timeout_expire);
+
+ if (!client->lease->t1)
+ client->lease->t1 = client->lease->lifetime / 2;
+
+ next_timeout = client_compute_timeout(client->request_sent,
+ client->lease->t1);
+ if (next_timeout < usec)
+ return -EINVAL;
+
+ r = sd_event_add_monotonic(client->event, next_timeout,
+ 10 * USEC_PER_MSEC,
+ client_timeout_t1, client,
+ &client->timeout_t1);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(client->timeout_t1, client->event_priority);
+ if (r < 0)
+ return r;
+
+ if (!client->lease->t2)
+ client->lease->t2 = client->lease->lifetime * 7 / 8;
+
+ if (client->lease->t2 < client->lease->t1)
+ return -EINVAL;
+
+ if (client->lease->lifetime < client->lease->t2)
+ return -EINVAL;
+
+ next_timeout = client_compute_timeout(client->request_sent,
+ client->lease->t2);
+ if (next_timeout < usec)
+ return -EINVAL;
+
+ r = sd_event_add_monotonic(client->event, next_timeout,
+ 10 * USEC_PER_MSEC,
+ client_timeout_t2, client,
+ &client->timeout_t2);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(client->timeout_t2, client->event_priority);
+ if (r < 0)
+ return r;
+
+ next_timeout = client_compute_timeout(client->request_sent,
+ client->lease->lifetime);
+ if (next_timeout < usec)
+ return -EINVAL;
+
+ r = sd_event_add_monotonic(client->event, next_timeout,
+ 10 * USEC_PER_MSEC,
+ client_timeout_expire, client,
+ &client->timeout_expire);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(client->timeout_expire, client->event_priority);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int client_receive_message(sd_event_source *s, int fd,
+ uint32_t revents, void *userdata) {
+ sd_dhcp_client *client = userdata;
+ uint8_t buf[sizeof(DHCPPacket) + DHCP_CLIENT_MIN_OPTIONS_SIZE];
+ int buflen = sizeof(buf);
+ int len, r = 0, notify_event = 0;
+ DHCPPacket *message;
+ usec_t time_now;
+
+ assert(s);
+ assert(client);
+ assert(client->event);
+
+ len = read(fd, &buf, buflen);
+ if (len < 0)
+ return 0;
+
+ r = sd_event_get_now_monotonic(client->event, &time_now);
+ if (r < 0)
+ goto error;
+
+ switch (client->state) {
+ case DHCP_STATE_SELECTING:
+
+ message = (DHCPPacket *)&buf;
+
+ if (client_receive_offer(client, message, len) >= 0) {
+
+ client->timeout_resend =
+ sd_event_source_unref(client->timeout_resend);
+
+ client->state = DHCP_STATE_REQUESTING;
+ client->attempt = 1;
+
+ r = sd_event_add_monotonic(client->event, time_now, 0,
+ client_timeout_resend,
+ client,
+ &client->timeout_resend);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_priority(client->timeout_resend, client->event_priority);
+ if (r < 0)
+ goto error;
+ }
+
+ break;
+
+ case DHCP_STATE_REQUESTING:
+ case DHCP_STATE_RENEWING:
+ case DHCP_STATE_REBINDING:
+
+ r = client_receive_ack(client, buf, len);
+
+ if (r == DHCP_EVENT_NO_LEASE)
+ goto error;
+
+ if (r >= 0) {
+ client->timeout_resend =
+ sd_event_source_unref(client->timeout_resend);
+
+ if (client->state == DHCP_STATE_REQUESTING)
+ notify_event = DHCP_EVENT_IP_ACQUIRE;
+ else if (r != DHCP_EVENT_IP_ACQUIRE)
+ notify_event = r;
+
+ client->state = DHCP_STATE_BOUND;
+ client->attempt = 1;
+
+ client->last_addr = client->lease->address;
+
+ r = client_set_lease_timeouts(client, time_now);
+ if (r < 0)
+ goto error;
+
+ if (notify_event)
+ client_notify(client, notify_event);
+
+ client->receive_message =
+ sd_event_source_unref(client->receive_message);
+ close(client->fd);
+ client->fd = -1;
+ }
+
+ r = 0;
+
+ break;
+
+ case DHCP_STATE_INIT:
+ case DHCP_STATE_INIT_REBOOT:
+ case DHCP_STATE_REBOOTING:
+ case DHCP_STATE_BOUND:
+
+ break;
+ }
+
+error:
+ if (r < 0 || r == DHCP_EVENT_NO_LEASE)
+ return client_stop(client, r);
+
+ return 0;
+}
+
+int sd_dhcp_client_start(sd_dhcp_client *client) {
+ int r;
+
+ assert_return(client, -EINVAL);
+ assert_return(client->event, -EINVAL);
+ assert_return(client->index > 0, -EINVAL);
+ assert_return(client->state == DHCP_STATE_INIT ||
+ client->state == DHCP_STATE_INIT_REBOOT, -EBUSY);
+
+ client->xid = random_u32();
+
+ r = dhcp_network_bind_raw_socket(client->index, &client->link);
+
+ if (r < 0) {
+ client_stop(client, r);
+ return r;
+ }
+
+ client->fd = r;
+ client->start_time = now(CLOCK_MONOTONIC);
+
+ return client_initialize_events(client, client->start_time);
+}
+
+int sd_dhcp_client_stop(sd_dhcp_client *client) {
+ return client_stop(client, DHCP_EVENT_STOP);
+}
+
+int sd_dhcp_client_attach_event(sd_dhcp_client *client, sd_event *event, int priority) {
+ int r;
+
+ assert_return(client, -EINVAL);
+ assert_return(!client->event, -EBUSY);
+
+ if (event)
+ client->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&client->event);
+ if (r < 0)
+ return 0;
+ }
+
+ client->event_priority = priority;
+
+ return 0;
+}
+
+int sd_dhcp_client_detach_event(sd_dhcp_client *client) {
+ assert_return(client, -EINVAL);
+
+ client->event = sd_event_unref(client->event);
+
+ return 0;
+}
+
+sd_event *sd_dhcp_client_get_event(sd_dhcp_client *client) {
+ if (!client)
+ return NULL;
+
+ return client->event;
+}
+
+void sd_dhcp_client_free(sd_dhcp_client *client) {
+ if (!client)
+ return;
+
+ sd_dhcp_client_stop(client);
+ sd_dhcp_client_detach_event(client);
+
+ free(client->req_opts);
+ free(client);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_dhcp_client*, sd_dhcp_client_free);
+#define _cleanup_dhcp_client_free_ _cleanup_(sd_dhcp_client_freep)
+
+int sd_dhcp_client_new(sd_dhcp_client **ret) {
+ _cleanup_dhcp_client_free_ sd_dhcp_client *client = NULL;
+
+ assert_return(ret, -EINVAL);
+
+ client = new0(sd_dhcp_client, 1);
+ if (!client)
+ return -ENOMEM;
+
+ client->state = DHCP_STATE_INIT;
+ client->index = -1;
+ client->fd = -1;
+ client->attempt = 1;
+
+ client->req_opts_size = ELEMENTSOF(default_req_opts);
+
+ client->req_opts = memdup(default_req_opts, client->req_opts_size);
+ if (!client->req_opts)
+ return -ENOMEM;
+
+ *ret = client;
+ client = NULL;
+
+ return 0;
+}
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;
+}
diff --git a/src/libsystemd-dhcp/test-dhcp-option.c b/src/libsystemd-dhcp/test-dhcp-option.c
new file mode 100644
index 0000000000..ac0b0a435a
--- /dev/null
+++ b/src/libsystemd-dhcp/test-dhcp-option.c
@@ -0,0 +1,378 @@
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+
+#include "util.h"
+#include "macro.h"
+
+#include "dhcp-protocol.h"
+#include "dhcp-internal.h"
+
+struct option_desc {
+ uint8_t sname[64];
+ int snamelen;
+ uint8_t file[128];
+ int filelen;
+ uint8_t options[128];
+ int len;
+ bool success;
+ int filepos;
+ int snamepos;
+ int pos;
+};
+
+static bool verbose = false;
+
+static struct option_desc option_tests[] = {
+ { {}, 0, {}, 0, { 42, 5, 65, 66, 67, 68, 69 }, 7, false, },
+ { {}, 0, {}, 0, { 42, 5, 65, 66, 67, 68, 69, 0, 0,
+ DHCP_OPTION_MESSAGE_TYPE, 1, DHCP_ACK }, 12, true, },
+ { {}, 0, {}, 0, { 8, 255, 70, 71, 72 }, 5, false, },
+ { {}, 0, {}, 0, { 0x35, 0x01, 0x05, 0x36, 0x04, 0x01, 0x00, 0xa8,
+ 0xc0, 0x33, 0x04, 0x00, 0x01, 0x51, 0x80, 0x01,
+ 0x04, 0xff, 0xff, 0xff, 0x00, 0x03, 0x04, 0xc0,
+ 0xa8, 0x00, 0x01, 0x06, 0x04, 0xc0, 0xa8, 0x00,
+ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, },
+ 40, true, },
+ { {}, 0, {}, 0, { DHCP_OPTION_MESSAGE_TYPE, 1, DHCP_OFFER,
+ 42, 3, 0, 0, 0 }, 8, true, },
+ { {}, 0, {}, 0, { 42, 2, 1, 2, 44 }, 5, false, },
+
+ { {}, 0,
+ { 222, 3, 1, 2, 3, DHCP_OPTION_MESSAGE_TYPE, 1, DHCP_NAK }, 8,
+ { DHCP_OPTION_OVERLOAD, 1, DHCP_OVERLOAD_FILE }, 3, true, },
+
+ { { 1, 4, 1, 2, 3, 4, DHCP_OPTION_MESSAGE_TYPE, 1, DHCP_ACK }, 9,
+ { 222, 3, 1, 2, 3 }, 5,
+ { DHCP_OPTION_OVERLOAD, 1,
+ DHCP_OVERLOAD_FILE|DHCP_OVERLOAD_SNAME }, 3, true, },
+};
+
+static const char *dhcp_type(int type)
+{
+ switch(type) {
+ case DHCP_DISCOVER:
+ return "DHCPDISCOVER";
+ case DHCP_OFFER:
+ return "DHCPOFFER";
+ case DHCP_REQUEST:
+ return "DHCPREQUEST";
+ case DHCP_DECLINE:
+ return "DHCPDECLINE";
+ case DHCP_ACK:
+ return "DHCPACK";
+ case DHCP_NAK:
+ return "DHCPNAK";
+ case DHCP_RELEASE:
+ return "DHCPRELEASE";
+ default:
+ return "unknown";
+ }
+}
+
+static void test_invalid_buffer_length(void)
+{
+ DHCPMessage message;
+
+ assert(dhcp_option_parse(&message, 0, NULL, NULL) == -EINVAL);
+ assert(dhcp_option_parse(&message, sizeof(DHCPMessage), NULL, NULL)
+ == -EINVAL);
+}
+
+static void test_cookie(void)
+{
+ _cleanup_free_ DHCPMessage *message;
+ size_t len = sizeof(DHCPMessage) + 4;
+ uint8_t *opt;
+
+ message = malloc0(len);
+
+ opt = (uint8_t *)(message + 1);
+ opt[0] = 0xff;
+
+ assert(dhcp_option_parse(message, len, NULL, NULL) == -EINVAL);
+
+ opt[0] = 99;
+ opt[1] = 130;
+ opt[2] = 83;
+ opt[3] = 99;
+
+ assert(dhcp_option_parse(message, len, NULL, NULL) == -ENOMSG);
+}
+
+static DHCPMessage *create_message(uint8_t *options, uint16_t optlen,
+ uint8_t *file, uint8_t filelen,
+ uint8_t *sname, uint8_t snamelen)
+{
+ DHCPMessage *message;
+ size_t len = sizeof(DHCPMessage) + 4 + optlen;
+ uint8_t *opt;
+
+ message = malloc0(len);
+ opt = (uint8_t *)(message + 1);
+
+ opt[0] = 99;
+ opt[1] = 130;
+ opt[2] = 83;
+ opt[3] = 99;
+
+ if (options && optlen)
+ memcpy(&opt[4], options, optlen);
+
+ if (file && filelen <= 128)
+ memcpy(&message->file, file, filelen);
+
+ if (sname && snamelen <= 64)
+ memcpy(&message->sname, sname, snamelen);
+
+ return message;
+}
+
+static void test_ignore_opts(uint8_t *descoption, int *descpos, int *desclen)
+{
+ while (*descpos < *desclen) {
+ switch(descoption[*descpos]) {
+ case DHCP_OPTION_PAD:
+ *descpos += 1;
+ break;
+
+ case DHCP_OPTION_MESSAGE_TYPE:
+ case DHCP_OPTION_OVERLOAD:
+ *descpos += 3;
+ break;
+
+ default:
+ return;
+ }
+ }
+}
+
+static int test_options_cb(uint8_t code, uint8_t len, const uint8_t *option,
+ void *user_data)
+{
+ struct option_desc *desc = user_data;
+ uint8_t *descoption = NULL;
+ int *desclen = NULL, *descpos = NULL;
+ uint8_t optcode = 0;
+ uint8_t optlen = 0;
+ uint8_t i;
+
+ assert((!desc && !code && !len) || desc);
+
+ if (!desc)
+ return -EINVAL;
+
+ assert(code != DHCP_OPTION_PAD);
+ assert(code != DHCP_OPTION_END);
+ assert(code != DHCP_OPTION_MESSAGE_TYPE);
+ assert(code != DHCP_OPTION_OVERLOAD);
+
+ while (desc->pos >= 0 || desc->filepos >= 0 || desc->snamepos >= 0) {
+
+ if (desc->pos >= 0) {
+ descoption = &desc->options[0];
+ desclen = &desc->len;
+ descpos = &desc->pos;
+ } else if (desc->filepos >= 0) {
+ descoption = &desc->file[0];
+ desclen = &desc->filelen;
+ descpos = &desc->filepos;
+ } else if (desc->snamepos >= 0) {
+ descoption = &desc->sname[0];
+ desclen = &desc->snamelen;
+ descpos = &desc->snamepos;
+ }
+
+ assert(descoption && desclen && descpos);
+
+ if (*desclen)
+ test_ignore_opts(descoption, descpos, desclen);
+
+ if (*descpos < *desclen)
+ break;
+
+ if (*descpos == *desclen)
+ *descpos = -1;
+ }
+
+ assert(descpos);
+ assert(*descpos != -1);
+
+ optcode = descoption[*descpos];
+ optlen = descoption[*descpos + 1];
+
+ if (verbose)
+ printf("DHCP code %2d(%2d) len %2d(%2d) ", code, optcode,
+ len, optlen);
+
+ assert(code == optcode);
+ assert(len == optlen);
+
+ for (i = 0; i < len; i++) {
+
+ if (verbose)
+ printf("0x%02x(0x%02x) ", option[i],
+ descoption[*descpos + 2 + i]);
+
+ assert(option[i] == descoption[*descpos + 2 + i]);
+ }
+
+ if (verbose)
+ printf("\n");
+
+ *descpos += optlen + 2;
+
+ test_ignore_opts(descoption, descpos, desclen);
+
+ if (desc->pos != -1 && desc->pos == desc->len)
+ desc->pos = -1;
+
+ if (desc->filepos != -1 && desc->filepos == desc->filelen)
+ desc->filepos = -1;
+
+ if (desc->snamepos != -1 && desc->snamepos == desc->snamelen)
+ desc->snamepos = -1;
+
+ return 0;
+}
+
+static void test_options(struct option_desc *desc)
+{
+ uint8_t *options = NULL;
+ uint8_t *file = NULL;
+ uint8_t *sname = NULL;
+ int optlen = 0;
+ int filelen = 0;
+ int snamelen = 0;
+ int buflen = 0;
+ _cleanup_free_ DHCPMessage *message;
+ int res;
+
+ if (desc) {
+ file = &desc->file[0];
+ filelen = desc->filelen;
+ if (!filelen)
+ desc->filepos = -1;
+
+ sname = &desc->sname[0];
+ snamelen = desc->snamelen;
+ if (!snamelen)
+ desc->snamepos = -1;
+
+ options = &desc->options[0];
+ optlen = desc->len;
+ desc->pos = 0;
+ }
+ message = create_message(options, optlen, file, filelen,
+ sname, snamelen);
+
+ buflen = sizeof(DHCPMessage) + 4 + optlen;
+
+ if (!desc) {
+ assert((res = dhcp_option_parse(message, buflen,
+ test_options_cb,
+ NULL)) == -ENOMSG);
+ } else if (desc->success) {
+ assert((res = dhcp_option_parse(message, buflen,
+ test_options_cb,
+ desc)) >= 0);
+ assert(desc->pos == -1 && desc->filepos == -1 &&
+ desc->snamepos == -1);
+ } else
+ assert((res = dhcp_option_parse(message, buflen,
+ test_options_cb,
+ desc)) < 0);
+
+ if (verbose)
+ printf("DHCP type %s\n", dhcp_type(res));
+}
+
+static uint8_t result[64] = {
+ 'A', 'B', 'C', 'D',
+};
+
+static uint8_t options[64] = {
+ 'A', 'B', 'C', 'D',
+ 160, 2, 0x11, 0x12,
+ 0,
+ 31, 8, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
+ 0,
+ 55, 3, 0x51, 0x52, 0x53,
+ 17, 7, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+ 255
+};
+
+static void test_option_set(void)
+{
+ size_t len, oldlen;
+ int pos, i;
+ uint8_t *opt;
+
+ assert(dhcp_option_append(NULL, NULL, 0, 0, NULL) == -EINVAL);
+
+ len = 0;
+ opt = &result[0];
+ assert(dhcp_option_append(&opt, NULL, 0, 0, NULL) == -EINVAL);
+ assert(opt == &result[0] && len == 0);
+
+ assert(dhcp_option_append(&opt, &len, DHCP_OPTION_PAD,
+ 0, NULL) == -ENOBUFS);
+ assert(opt == &result[0] && len == 0);
+
+ opt = &result[4];
+ len = 1;
+ assert(dhcp_option_append(&opt, &len, DHCP_OPTION_PAD,
+ 0, NULL) >= 0);
+ assert(opt == &result[5] && len == 0);
+
+ pos = 4;
+ len = 60;
+ while (pos < 64 && options[pos] != DHCP_OPTION_END) {
+ opt = &result[pos];
+ oldlen = len;
+
+ assert(dhcp_option_append(&opt, &len, options[pos],
+ options[pos + 1],
+ &options[pos + 2]) >= 0);
+
+ if (options[pos] == DHCP_OPTION_PAD) {
+ assert(opt == &result[pos + 1]);
+ assert(len == oldlen - 1);
+ pos++;
+ } else {
+ assert(opt == &result[pos + 2 + options[pos + 1]]);
+ assert(len == oldlen - 2 - options[pos + 1]);
+ pos += 2 + options[pos + 1];
+ }
+ }
+
+ for (i = 0; i < pos; i++) {
+ if (verbose)
+ printf("%2d: 0x%02x(0x%02x)\n", i, result[i],
+ options[i]);
+ assert(result[i] == options[i]);
+ }
+
+ if (verbose)
+ printf ("\n");
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i;
+
+ test_invalid_buffer_length();
+ test_cookie();
+
+ test_options(NULL);
+
+ for (i = 0; i < ELEMENTSOF(option_tests); i++)
+ test_options(&option_tests[i]);
+
+ test_option_set();
+
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-08 04:18:34 +0000