[systemd-devel] [RFC PATCH] sd-dhcp-client: support non-Ethernet hardware addresses
Dan Williams
dcbw at redhat.com
Wed Aug 13 06:40:06 PDT 2014
On Wed, 2014-08-06 at 11:22 -0500, Dan Williams wrote:
> Like Infiniband. See RFC 4390 section 2.1 for details on DHCP
> and Infiniband; chaddr is zeroed, hlen is set to 0, and htype
> is set to ARPHRD_INFINIBAND because IB hardware addresses
> are 20 bytes in length.
> ---
> NOTE: because of how dhcp_network_bind_raw_socket() does its packet
> filter, it's not easy to change some of the checks it uses without
> having callers pass the actual values into the function, which seems
> redundant. Thus I opted for the current approach, but that does
> add a warning about mixed declarations and code. Can anyone think
> of a better way to do this?
>
> An possible improvement to sd_dhcp_client_set_mac() would be
> keying the MAC address length off 'arp_type' instead of
> specifying it explicitly.
Any comments on this approach Tom? (or anyone else?)
Dan
> src/libsystemd-network/dhcp-internal.h | 10 +++--
> src/libsystemd-network/dhcp-network.c | 39 +++++++++++++++----
> src/libsystemd-network/dhcp-packet.c | 8 ++--
> src/libsystemd-network/sd-dhcp-client.c | 63 +++++++++++++++++++++++--------
> src/libsystemd-network/sd-dhcp-server.c | 6 +--
> src/libsystemd-network/test-dhcp-client.c | 14 +++++--
> src/libsystemd-network/test-dhcp-option.c | 2 +-
> src/network/networkd-link.c | 9 ++++-
> src/systemd/sd-dhcp-client.h | 4 +-
> 9 files changed, 116 insertions(+), 39 deletions(-)
>
> diff --git a/src/libsystemd-network/dhcp-internal.h b/src/libsystemd-network/dhcp-internal.h
> index 1069c8a..d358a49 100644
> --- a/src/libsystemd-network/dhcp-internal.h
> +++ b/src/libsystemd-network/dhcp-internal.h
> @@ -20,22 +20,25 @@
>
> 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 <net/if_arp.h>
> #include <net/ethernet.h>
>
> #include "socket-util.h"
>
> #include "sd-dhcp-client.h"
> #include "dhcp-protocol.h"
>
> -int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link, uint32_t xid, struct ether_addr mac_addr);
> +int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link,
> + uint32_t xid, const uint8_t *mac_addr,
> + size_t mac_addr_len, uint16_t arp_type);
> int dhcp_network_bind_udp_socket(be32_t address, uint16_t port);
> 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 address, uint16_t port,
> const void *packet, size_t len);
>
> int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, uint8_t overload,
> @@ -43,16 +46,17 @@ int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, uint8_
>
> 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);
>
> -int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid, uint8_t type,
> - size_t optlen, size_t *optoffset);
> +int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid,
> + uint8_t type, uint16_t arp_type, size_t optlen,
> + size_t *optoffset);
>
> uint16_t dhcp_packet_checksum(uint8_t *buf, size_t len);
>
> void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr,
> uint16_t source, be32_t destination_addr,
> uint16_t destination, uint16_t len);
>
> diff --git a/src/libsystemd-network/dhcp-network.c b/src/libsystemd-network/dhcp-network.c
> index 1ced5cf..4d82bcf 100644
> --- a/src/libsystemd-network/dhcp-network.c
> +++ b/src/libsystemd-network/dhcp-network.c
> @@ -18,26 +18,45 @@
> ***/
>
> #include <errno.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <string.h>
> #include <linux/if_packet.h>
> +#include <linux/if_infiniband.h>
> #include <net/ethernet.h>
> #include <net/if_arp.h>
> #include <stdio.h>
> #include <unistd.h>
> #include <linux/filter.h>
>
> #include "socket-util.h"
>
> #include "dhcp-internal.h"
>
> +/* Default broadcast address for IPoIB */
> +static const uint8_t ib_bcast_addr[20] = {
> + 0x00, 0xff, 0xff, 0xff, 0xff, 0x12, 0x40, 0x1b,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0xff, 0xff, 0xff, 0xff
> +};
> +
> int dhcp_network_bind_raw_socket(int ifindex, union sockaddr_union *link,
> - uint32_t xid, struct ether_addr mac_addr) {
> + uint32_t xid, const uint8_t *mac_addr,
> + size_t mac_addr_len, uint16_t arp_type) {
> + struct ether_addr eth_mac = { { 0, 0, 0, 0, 0, 0 } };
> + uint8_t dhcp_hlen = 0;
> +
> + assert_return(mac_addr_len > 0, -EINVAL);
> +
> + if (arp_type == ARPHRD_ETHER) {
> + assert_return(mac_addr_len == ETH_ALEN, -EINVAL);
> + memcpy(ð_mac, mac_addr, ETH_ALEN);
> + dhcp_hlen = ETH_ALEN;
> + }
>
> struct sock_filter filter[] = {
> BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0), /* A <- packet length */
> BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(DHCPPacket), 1, 0), /* packet >= DHCPPacket ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> BPF_STMT(BPF_LD + BPF_B + BPF_ABS, offsetof(DHCPPacket, ip.protocol)), /* A <- IP protocol */
> BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, IPPROTO_UDP, 1, 0), /* IP protocol == UDP ? */
> @@ -53,29 +72,29 @@ int dhcp_network_bind_raw_socket(int ifindex, union sockaddr_union *link,
> BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(DHCPPacket, udp.dest)), /* A <- UDP destination port */
> BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, DHCP_PORT_CLIENT, 1, 0), /* UDP destination port == DHCP client port ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> BPF_STMT(BPF_LD + BPF_B + BPF_ABS, offsetof(DHCPPacket, dhcp.op)), /* A <- DHCP op */
> BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, BOOTREPLY, 1, 0), /* op == BOOTREPLY ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> BPF_STMT(BPF_LD + BPF_B + BPF_ABS, offsetof(DHCPPacket, dhcp.htype)), /* A <- DHCP header type */
> - BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ARPHRD_ETHER, 1, 0), /* header type == ARPHRD_ETHER ? */
> + BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, arp_type, 1, 0), /* header type == arp_type ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> BPF_STMT(BPF_LD + BPF_B + BPF_ABS, offsetof(DHCPPacket, dhcp.hlen)), /* A <- mac address length */
> - BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ETHER_ADDR_LEN, 1, 0), /* address length == ETHER_ADDR_LEN ? */
> + BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, dhcp_hlen, 1, 0), /* address length == dhcp_hlen ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(DHCPPacket, dhcp.xid)), /* A <- client identifier */
> BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, xid, 1, 0), /* client identifier == xid ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> - BPF_STMT(BPF_LD + BPF_IMM, htobe32(*((unsigned int *) &mac_addr))), /* A <- 4 bytes of client's MAC */
> + BPF_STMT(BPF_LD + BPF_IMM, htobe32(*((unsigned int *) ð_mac))), /* A <- 4 bytes of client's MAC */
> BPF_STMT(BPF_MISC + BPF_TAX, 0), /* X <- A */
> BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(DHCPPacket, dhcp.chaddr)), /* A <- 4 bytes of MAC from dhcp.chaddr */
> BPF_STMT(BPF_ALU + BPF_XOR + BPF_X, 0), /* A xor X */
> BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0, 1, 0), /* A == 0 ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> - BPF_STMT(BPF_LD + BPF_IMM, htobe16(*((unsigned short *) (((char *) &mac_addr) + 4)))), /* A <- remainder of client's MAC */
> + BPF_STMT(BPF_LD + BPF_IMM, htobe16(*((unsigned short *) (((char *) ð_mac) + 4)))), /* A <- remainder of client's MAC */
> BPF_STMT(BPF_MISC + BPF_TAX, 0), /* X <- A */
> BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(DHCPPacket, dhcp.chaddr) + 4), /* A <- remainder of MAC from dhcp.chaddr */
> BPF_STMT(BPF_ALU + BPF_XOR + BPF_X, 0), /* A xor X */
> BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0, 1, 0), /* A == 0 ? */
> BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
> BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(DHCPPacket, dhcp.magic)), /* A <- DHCP magic cookie */
> BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, DHCP_MAGIC_COOKIE, 1, 0), /* cookie == DHCP magic cookie ? */
> @@ -103,16 +122,22 @@ int dhcp_network_bind_raw_socket(int ifindex, union sockaddr_union *link,
> r = setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog));
> if (r < 0)
> return -errno;
>
> link->ll.sll_family = AF_PACKET;
> link->ll.sll_protocol = htons(ETH_P_IP);
> link->ll.sll_ifindex = ifindex;
> - link->ll.sll_halen = ETH_ALEN;
> - memset(link->ll.sll_addr, 0xff, ETH_ALEN);
> + link->ll.sll_hatype = htons(arp_type);
> + link->ll.sll_halen = mac_addr_len;
> + if (mac_addr_len == ETH_ALEN)
> + memset(link->ll.sll_addr, 0xff, ETH_ALEN);
> + else if (mac_addr_len == INFINIBAND_ALEN)
> + memcpy(link->ll.sll_addr, ib_bcast_addr, sizeof (ib_bcast_addr));
> + else
> + assert_not_reached("unhandled hardware address length");
>
> r = bind(s, &link->sa, sizeof(link->ll));
> if (r < 0)
> return -errno;
>
> r = s;
> s = -1;
> diff --git a/src/libsystemd-network/dhcp-packet.c b/src/libsystemd-network/dhcp-packet.c
> index 9f850fd..7581dae 100644
> --- a/src/libsystemd-network/dhcp-packet.c
> +++ b/src/libsystemd-network/dhcp-packet.c
> @@ -34,23 +34,25 @@
> #include "dhcp-internal.h"
> #include "sd-dhcp-lease.h"
> #include "sd-dhcp-client.h"
>
> #define DHCP_CLIENT_MIN_OPTIONS_SIZE 312
>
> int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid,
> - uint8_t type, size_t optlen, size_t *optoffset) {
> + uint8_t type, uint16_t arp_type, size_t optlen,
> + size_t *optoffset) {
> size_t offset = 0;
> int r;
>
> assert(op == BOOTREQUEST || op == BOOTREPLY);
> + assert(arp_type == ARPHRD_ETHER || arp_type == ARPHRD_INFINIBAND);
>
> message->op = op;
> - message->htype = ARPHRD_ETHER;
> - message->hlen = ETHER_ADDR_LEN;
> + message->htype = arp_type;
> + message->hlen = (arp_type == ARPHRD_ETHER) ? ETHER_ADDR_LEN : 0;
> message->xid = htobe32(xid);
> message->magic = htobe32(DHCP_MAGIC_COOKIE);
>
> r = dhcp_option_append(message, optlen, &offset, 0,
> DHCP_OPTION_MESSAGE_TYPE, 1, &type);
> if (r < 0)
> return r;
> diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
> index f5910d9..b36a18d 100644
> --- a/src/libsystemd-network/sd-dhcp-client.c
> +++ b/src/libsystemd-network/sd-dhcp-client.c
> @@ -33,14 +33,16 @@
> #include "async.h"
>
> #include "dhcp-protocol.h"
> #include "dhcp-internal.h"
> #include "dhcp-lease-internal.h"
> #include "sd-dhcp-client.h"
>
> +#define MAX_MAC_ADDR_LEN 20 /* INFINIBAND_ALEN */
> +
> struct sd_dhcp_client {
> RefCount n_ref;
>
> DHCPState state;
> sd_event *event;
> int event_priority;
> sd_event_source *timeout_resend;
> @@ -53,14 +55,17 @@ struct sd_dhcp_client {
> size_t req_opts_allocated;
> size_t req_opts_size;
> be32_t last_addr;
> struct {
> uint8_t type;
> struct ether_addr mac_addr;
> } _packed_ client_id;
> + uint8_t mac_addr[MAX_MAC_ADDR_LEN];
> + size_t mac_addr_len;
> + uint16_t arp_type;
> char *hostname;
> char *vendor_class_identifier;
> uint32_t mtu;
> uint32_t xid;
> usec_t start_time;
> uint16_t secs;
> unsigned int attempt;
> @@ -159,32 +164,39 @@ int sd_dhcp_client_set_index(sd_dhcp_client *client, int interface_index) {
> assert_return(interface_index > 0, -EINVAL);
>
> client->index = interface_index;
>
> return 0;
> }
>
> -int sd_dhcp_client_set_mac(sd_dhcp_client *client,
> - const struct ether_addr *addr) {
> +int sd_dhcp_client_set_mac(sd_dhcp_client *client, const uint8_t *addr,
> + size_t addr_len, uint16_t arp_type) {
> DHCP_CLIENT_DONT_DESTROY(client);
> bool need_restart = false;
>
> assert_return(client, -EINVAL);
> assert_return(addr, -EINVAL);
> + assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL);
> + assert_return(arp_type > 0, -EINVAL);
>
> - if (memcmp(&client->client_id.mac_addr, addr, ETH_ALEN) == 0)
> + if (client->mac_addr_len == addr_len &&
> + memcmp(&client->mac_addr, addr, addr_len) == 0)
> return 0;
>
> if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
> log_dhcp_client(client, "Changing MAC address on running DHCP "
> "client, restarting");
> need_restart = true;
> client_stop(client, DHCP_EVENT_STOP);
> }
>
> + memcpy(&client->mac_addr, addr, addr_len);
> + client->mac_addr_len = addr_len;
> + client->arp_type = arp_type;
> +
> memcpy(&client->client_id.mac_addr, addr, ETH_ALEN);
> client->client_id.type = 0x01;
>
> if (need_restart && client->state != DHCP_STATE_STOPPED)
> sd_dhcp_client_start(client);
>
> return 0;
> @@ -314,15 +326,15 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
> size = sizeof(DHCPPacket) + optlen;
>
> packet = malloc0(size);
> if (!packet)
> return -ENOMEM;
>
> r = dhcp_message_init(&packet->dhcp, BOOTREQUEST, client->xid, type,
> - optlen, &optoffset);
> + client->arp_type, optlen, &optoffset);
> if (r < 0)
> return r;
>
> /* Although 'secs' field is a SHOULD in RFC 2131, certain DHCP servers
> refuse to issue an DHCP lease if 'secs' is set to zero */
> packet->dhcp.secs = htobe16(client->secs);
>
> @@ -338,17 +350,20 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
> needs this to be disabled as broadcasts are filteretd, so this
> needs to be configurable */
> if (client->request_broadcast)
> packet->dhcp.flags = htobe16(0x8000);
>
> /* RFC2132 section 4.1.1:
> The client MUST include its hardware address in the ’chaddr’ field, if
> - necessary for delivery of DHCP reply messages.
> + necessary for delivery of DHCP reply messages. Non-Ethernet
> + interfaces will leave 'chaddr' empty and use the client identifier
> + instead (eg, RFC 4390 section 2.1).
> */
> - memcpy(&packet->dhcp.chaddr, &client->client_id.mac_addr, ETH_ALEN);
> + if (client->mac_addr_len == ETH_ALEN)
> + memcpy(&packet->dhcp.chaddr, &client->mac_addr, ETH_ALEN);
>
> /* Some DHCP servers will refuse to issue an DHCP lease if the Client
> Identifier option is not set */
> r = dhcp_option_append(&packet->dhcp, optlen, &optoffset, 0,
> DHCP_OPTION_CLIENT_IDENTIFIER,
> sizeof(client->client_id), &client->client_id);
> if (r < 0)
> @@ -824,15 +839,17 @@ static int client_start(sd_dhcp_client *client) {
> assert_return(client->fd < 0, -EBUSY);
> assert_return(client->xid == 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, client->xid, client->client_id.mac_addr);
> + r = dhcp_network_bind_raw_socket(client->index, &client->link,
> + client->xid, client->mac_addr,
> + client->mac_addr_len, client->arp_type);
> if (r < 0) {
> client_stop(client, r);
> return r;
> }
> client->fd = r;
>
> if (client->state == DHCP_STATE_INIT) {
> @@ -868,15 +885,17 @@ static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata)
>
> client->receive_message = sd_event_source_unref(client->receive_message);
> client->fd = asynchronous_close(client->fd);
>
> client->state = DHCP_STATE_REBINDING;
> client->attempt = 1;
>
> - r = dhcp_network_bind_raw_socket(client->index, &client->link, client->xid, client->client_id.mac_addr);
> + r = dhcp_network_bind_raw_socket(client->index, &client->link,
> + client->xid, client->mac_addr,
> + client->mac_addr_len, client->arp_type);
> if (r < 0) {
> client_stop(client, r);
> return 0;
> }
> client->fd = r;
>
> return client_initialize_events(client, client_receive_message_raw);
> @@ -1292,14 +1311,17 @@ error:
> }
>
> static int client_receive_message_udp(sd_event_source *s, int fd,
> uint32_t revents, void *userdata) {
> sd_dhcp_client *client = userdata;
> _cleanup_free_ DHCPMessage *message = NULL;
> int buflen = 0, len, r;
> + const struct ether_addr zero_mac = { { 0, 0, 0, 0, 0, 0 } };
> + const struct ether_addr *expected_chaddr = NULL;
> + uint8_t expected_hlen = 0;
>
> assert(s);
> assert(client);
>
> r = ioctl(fd, FIONREAD, &buflen);
> if (r < 0)
> return r;
> @@ -1328,21 +1350,34 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
> }
>
> if (message->op != BOOTREPLY) {
> log_dhcp_client(client, "not a BOOTREPLY message: ignoring");
> return 0;
> }
>
> - if (message->htype != ARPHRD_ETHER || message->hlen != ETHER_ADDR_LEN) {
> - log_dhcp_client(client, "not an ethernet packet");
> + if (message->htype != client->arp_type) {
> + log_dhcp_client(client, "packet type does not match client type");
> return 0;
> }
>
> - if (memcmp(&message->chaddr[0], &client->client_id.mac_addr,
> - ETH_ALEN)) {
> + if (client->arp_type == ARPHRD_ETHER) {
> + expected_hlen = ETH_ALEN;
> + expected_chaddr = (const struct ether_addr *) &client->mac_addr;
> + } else {
> + /* Non-ethernet links expect zero chaddr */
> + expected_hlen = 0;
> + expected_chaddr = &zero_mac;
> + }
> +
> + if (message->hlen != expected_hlen) {
> + log_dhcp_client(client, "unexpected packet hlen %d", message->hlen);
> + return 0;
> + }
> +
> + if (memcmp(&message->chaddr[0], expected_chaddr, ETH_ALEN)) {
> log_dhcp_client(client, "received chaddr does not match "
> "expected: ignoring");
> return 0;
> }
>
> if (client->state != DHCP_STATE_BOUND &&
> be32toh(message->xid) != client->xid) {
> @@ -1429,17 +1464,15 @@ int sd_dhcp_client_start(sd_dhcp_client *client) {
> return r;
>
> if (client->last_addr)
> client->state = DHCP_STATE_INIT_REBOOT;
>
> r = client_start(client);
> if (r >= 0)
> - log_dhcp_client(client, "STARTED on ifindex %u with address %s",
> - client->index,
> - ether_ntoa(&client->client_id.mac_addr));
> + log_dhcp_client(client, "STARTED on ifindex %u", client->index);
>
> return r;
> }
>
> int sd_dhcp_client_stop(sd_dhcp_client *client) {
> DHCP_CLIENT_DONT_DESTROY(client);
>
> diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c
> index c224aa1..79b104c 100644
> --- a/src/libsystemd-network/sd-dhcp-server.c
> +++ b/src/libsystemd-network/sd-dhcp-server.c
> @@ -375,15 +375,15 @@ static int server_message_init(sd_dhcp_server *server, DHCPPacket **ret,
> assert(IN_SET(type, DHCP_OFFER, DHCP_ACK, DHCP_NAK));
>
> packet = malloc0(sizeof(DHCPPacket) + req->max_optlen);
> if (!packet)
> return -ENOMEM;
>
> r = dhcp_message_init(&packet->dhcp, BOOTREPLY, be32toh(req->message->xid),
> - type, req->max_optlen, &optoffset);
> + type, ARPHRD_ETHER, req->max_optlen, &optoffset);
> if (r < 0)
> return r;
>
> packet->dhcp.flags = req->message->flags;
> packet->dhcp.giaddr = req->message->giaddr;
> memcpy(&packet->dhcp.chaddr, &req->message->chaddr, ETH_ALEN);
>
> @@ -491,16 +491,16 @@ static int server_send_forcerenew(sd_dhcp_server *server, be32_t address, be32_t
> assert(chaddr);
>
> packet = malloc0(sizeof(DHCPPacket) + DHCP_MIN_OPTIONS_SIZE);
> if (!packet)
> return -ENOMEM;
>
> r = dhcp_message_init(&packet->dhcp, BOOTREPLY, 0,
> - DHCP_FORCERENEW, DHCP_MIN_OPTIONS_SIZE,
> - &optoffset);
> + DHCP_FORCERENEW, ARPHRD_ETHER,
> + DHCP_MIN_OPTIONS_SIZE, &optoffset);
> if (r < 0)
> return r;
>
> r = dhcp_option_append(&packet->dhcp, DHCP_MIN_OPTIONS_SIZE,
> &optoffset, 0, DHCP_OPTION_END, 0, NULL);
> if (r < 0)
> return r;
> diff --git a/src/libsystemd-network/test-dhcp-client.c b/src/libsystemd-network/test-dhcp-client.c
> index c48aa04..7dab97d 100644
> --- a/src/libsystemd-network/test-dhcp-client.c
> +++ b/src/libsystemd-network/test-dhcp-client.c
> @@ -192,15 +192,17 @@ int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
>
> assert_se(callback_recv);
> callback_recv(size, &discover->dhcp);
>
> return 575;
> }
>
> -int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link, uint32_t id, struct ether_addr mac)
> +int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link,
> + uint32_t id, const uint8_t *addr,
> + size_t addr_len, uint16_t arp_type)
> {
> if (socketpair(AF_UNIX, SOCK_STREAM, 0, test_fd) < 0)
> return -errno;
>
> return test_fd[0];
> }
>
> @@ -240,15 +242,18 @@ static void test_discover_message(sd_event *e)
> assert_se(r >= 0);
> assert_se(client);
>
> r = sd_dhcp_client_attach_event(client, e, 0);
> assert_se(r >= 0);
>
> assert_se(sd_dhcp_client_set_index(client, 42) >= 0);
> - assert_se(sd_dhcp_client_set_mac(client, &mac_addr) >= 0);
> + assert_se(sd_dhcp_client_set_mac(client,
> + (const uint8_t *) &mac_addr,
> + sizeof (mac_addr),
> + ARPHRD_ETHER) >= 0);
>
> assert_se(sd_dhcp_client_set_request_option(client, 248) >= 0);
>
> callback_recv = test_discover_message_verify;
>
> res = sd_dhcp_client_start(client);
>
> @@ -458,15 +463,18 @@ static void test_addr_acq(sd_event *e) {
> assert_se(r >= 0);
> assert_se(client);
>
> r = sd_dhcp_client_attach_event(client, e, 0);
> assert_se(r >= 0);
>
> assert_se(sd_dhcp_client_set_index(client, 42) >= 0);
> - assert_se(sd_dhcp_client_set_mac(client, &mac_addr) >= 0);
> + assert_se(sd_dhcp_client_set_mac(client,
> + (const uint8_t *) &mac_addr,
> + sizeof (mac_addr),
> + ARPHRD_ETHER) >= 0);
>
> assert_se(sd_dhcp_client_set_callback(client, test_addr_acq_acquired, e)
> >= 0);
>
> callback_recv = test_addr_acq_recv_discover;
>
> assert_se(sd_event_add_time(e, &test_hangcheck,
> diff --git a/src/libsystemd-network/test-dhcp-option.c b/src/libsystemd-network/test-dhcp-option.c
> index 92c58e0..ed81fe7 100644
> --- a/src/libsystemd-network/test-dhcp-option.c
> +++ b/src/libsystemd-network/test-dhcp-option.c
> @@ -88,15 +88,15 @@ static void test_message_init(void)
> size_t optlen = 4, optoffset;
> size_t len = sizeof(DHCPMessage) + optlen;
> uint8_t *magic;
>
> message = malloc0(len);
>
> assert_se(dhcp_message_init(message, BOOTREQUEST, 0x12345678,
> - DHCP_DISCOVER, optlen, &optoffset) >= 0);
> + DHCP_DISCOVER, ARPHRD_ETHER, optlen, &optoffset) >= 0);
>
> assert_se(message->xid == htobe32(0x12345678));
> assert_se(message->op == BOOTREQUEST);
>
> magic = (uint8_t*)&message->magic;
>
> assert_se(magic[0] == 99);
> diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
> index eff14ca..6516f38 100644
> --- a/src/network/networkd-link.c
> +++ b/src/network/networkd-link.c
> @@ -1815,15 +1815,17 @@ static int link_configure(Link *link) {
> if (r < 0)
> return r;
>
> r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
> if (r < 0)
> return r;
>
> - r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
> + r = sd_dhcp_client_set_mac(link->dhcp_client,
> + (const uint8_t *) &link->mac,
> + sizeof (link->mac), ARPHRD_ETHER);
> if (r < 0)
> return r;
>
> r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
> if (r < 0)
> return r;
>
> @@ -2246,15 +2248,18 @@ int link_update(Link *link, sd_rtnl_message *m) {
> "address in IPv4LL client: %s",
> strerror(-r));
> return r;
> }
> }
>
> if (link->dhcp_client) {
> - r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
> + r = sd_dhcp_client_set_mac(link->dhcp_client,
> + (const uint8_t *) &link->mac,
> + sizeof (link->mac),
> + ARPHRD_ETHER);
> if (r < 0) {
> log_warning_link(link, "Could not update MAC "
> "address in DHCP client: %s",
> strerror(-r));
> return r;
> }
> }
> diff --git a/src/systemd/sd-dhcp-client.h b/src/systemd/sd-dhcp-client.h
> index 98c6782..7416f82 100644
> --- a/src/systemd/sd-dhcp-client.h
> +++ b/src/systemd/sd-dhcp-client.h
> @@ -45,16 +45,16 @@ int sd_dhcp_client_set_callback(sd_dhcp_client *client, sd_dhcp_client_cb_t cb,
>
>
> int sd_dhcp_client_set_request_option(sd_dhcp_client *client, uint8_t option);
> int sd_dhcp_client_set_request_address(sd_dhcp_client *client,
> const struct in_addr *last_address);
> int sd_dhcp_client_set_request_broadcast(sd_dhcp_client *client, int broadcast);
> int sd_dhcp_client_set_index(sd_dhcp_client *client, int interface_index);
> -int sd_dhcp_client_set_mac(sd_dhcp_client *client,
> - const struct ether_addr *addr);
> +int sd_dhcp_client_set_mac(sd_dhcp_client *client, const uint8_t *addr,
> + size_t addr_len, uint16_t arp_type);
> int sd_dhcp_client_set_mtu(sd_dhcp_client *client, uint32_t mtu);
> int sd_dhcp_client_set_hostname(sd_dhcp_client *client, const char *hostname);
> int sd_dhcp_client_set_vendor_class_identifier(sd_dhcp_client *client, const char *vci);
> int sd_dhcp_client_get_lease(sd_dhcp_client *client, sd_dhcp_lease **ret);
>
> int sd_dhcp_client_stop(sd_dhcp_client *client);
> int sd_dhcp_client_start(sd_dhcp_client *client);
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