[systemd-devel] [PATCH] sd-dhcp-client: support non-Ethernet hardware addresses
Tom Gundersen
teg at jklm.no
Thu Oct 2 11:05:12 PDT 2014
On Thu, Oct 2, 2014 at 6:07 PM, Dan Williams <dcbw at redhat.com> wrote:
> On Thu, 2014-10-02 at 16:39 +0200, Tom Gundersen wrote:
>> On Fri, Sep 26, 2014 at 10:15 PM, Dan Williams <dcbw at redhat.com> 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.
>>
>> Sorry for taking time with this. Overall looks good, just minor comments inline.
>>
>> > ---
>> > src/libsystemd-network/dhcp-internal.h | 10 +++--
>> > src/libsystemd-network/dhcp-network.c | 54 ++++++++++++++++++++-----
>> > src/libsystemd-network/dhcp-packet.c | 8 ++--
>> > src/libsystemd-network/sd-dhcp-client.c | 66 +++++++++++++++++++++++--------
>> > src/libsystemd-network/sd-dhcp-server.c | 8 ++--
>> > src/libsystemd-network/test-dhcp-client.c | 14 +++++--
>> > src/libsystemd-network/test-dhcp-option.c | 2 +-
>> > src/network/networkd-dhcp4.c | 4 +-
>> > src/network/networkd-link.c | 4 +-
>> > src/systemd/sd-dhcp-client.h | 4 +-
>> > 10 files changed, 130 insertions(+), 44 deletions(-)
>> >
>> > *** Testing appreciated....
>> >
>> > 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..29e9993 100644
>> > --- a/src/libsystemd-network/dhcp-network.c
>> > +++ b/src/libsystemd-network/dhcp-network.c
>> > @@ -18,27 +18,31 @@
>> > ***/
>> >
>> > #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"
>> >
>> > -int dhcp_network_bind_raw_socket(int ifindex, union sockaddr_union *link,
>> > - uint32_t xid, struct ether_addr mac_addr) {
>> > -
>> > +static int _bind_raw_socket(int ifindex, union sockaddr_union *link,
>> > + uint32_t xid, const uint8_t *mac_addr,
>> > + size_t mac_addr_len,
>> > + const uint8_t *bcast_addr,
>> > + const struct ether_addr *eth_mac,
>> > + uint16_t arp_type, uint8_t dhcp_hlen) {
>> > 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 ? */
>> > BPF_STMT(BPF_RET + BPF_K, 0), /* ignore */
>> > @@ -53,29 +57,29 @@ 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 */
>>
>> Won't the following be all wrong in case hlen != ETHER_ADDR_LEN? I
>> mean we are here hard-coding it to compare 6 bytes... Or am I missing
>> something?
>
> The DHCPv4 header is the same format no matter what the LL address size,
> but for non-ethernet the hlen is 0 and the chaddr is zeroed. The BPF is
> seeded with an hlen of 0 and a valid ETH_ALEN sized buffer of all zeros.
> So both the hlen and chaddr comparisons comparison should succeed.
>
> Does that make sense? I might have missed something too though...
So that sounds fine, but my concern was: are we guaranteed that all
implementations properly zero out the remaining bytes past the hlen
first ones? Sounds weird to reject a package if it has hlen == 0 and
garbage in chaddr, or is the zeroing something we can rely on? (In
that case I guess we should extend the check to check all 16 bytes,
and not only the 6 first ones to make it truly agnostic).
Patrik, any thoughts?
>> If there is no way to do this nicely using BPF we can just move the
>> mac addr check to userspace (as we are already doing for received UDP
>> packets).
>>
>> Cheers,
>>
>> Tom
>>
>> > - 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 *) eth_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 *) eth_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 ? */
>> > @@ -103,27 +107,59 @@ 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;
>> > + memcpy(link->ll.sll_addr, bcast_addr, mac_addr_len);
>> >
>> > r = bind(s, &link->sa, sizeof(link->ll));
>> > if (r < 0)
>> > return -errno;
>> >
>> > r = s;
>> > s = -1;
>> >
>> > return r;
>> > }
>> >
>> > +int dhcp_network_bind_raw_socket(int ifindex, union sockaddr_union *link,
>> > + uint32_t xid, const uint8_t *mac_addr,
>> > + size_t mac_addr_len, uint16_t arp_type) {
>> > + static const uint8_t eth_bcast[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
>> > + /* Default broadcast address for IPoIB */
>> > + static const uint8_t ib_bcast[] = {
>> > + 0x00, 0xff, 0xff, 0xff, 0xff, 0x12, 0x40, 0x1b,
>> > + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> > + 0xff, 0xff, 0xff, 0xff
>> > + };
>> > + struct ether_addr eth_mac = { { 0, 0, 0, 0, 0, 0 } };
>> > + const uint8_t *bcast_addr = NULL;
>> > + 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);
>> > + bcast_addr = eth_bcast;
>> > + dhcp_hlen = ETH_ALEN;
>> > + } else if (arp_type == ARPHRD_INFINIBAND) {
>> > + assert_return(mac_addr_len == INFINIBAND_ALEN, -EINVAL);
>> > + bcast_addr = ib_bcast;
>> > + } else
>> > + return -EINVAL;
>> > +
>> > + return _bind_raw_socket(ifindex, link, xid, mac_addr, mac_addr_len,
>> > + bcast_addr, ð_mac, arp_type, dhcp_hlen);
>> > +}
>> > +
>> > int dhcp_network_bind_udp_socket(be32_t address, uint16_t port) {
>> > union sockaddr_union src = {
>> > .in.sin_family = AF_INET,
>> > .in.sin_port = htobe16(port),
>> > .in.sin_addr.s_addr = address,
>> > };
>> > _cleanup_close_ int 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 2f94c16..ad04f98 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);
>> >
>> > @@ -333,22 +345,25 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
>> > DHCPREQUEST messages that client sends. The BROADCAST bit will
>> > provide a hint to the DHCP server and BOOTP relay agent to broadcast
>> > any messages to the client on the client's subnet.
>> >
>> > Note: some interfaces needs this to be enabled, but some networks
>> > needs this to be disabled as broadcasts are filteretd, so this
>> > needs to be configurable */
>> > - if (client->request_broadcast)
>> > + if (client->request_broadcast || client->arp_type != ARPHRD_ETHER)
>> > 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)
>> > @@ -839,15 +854,17 @@ 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) {
>> > @@ -883,15 +900,17 @@ 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);
>> > @@ -1327,14 +1346,17 @@ 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;
>> > @@ -1363,21 +1385,34 @@ 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) {
>> > @@ -1451,31 +1486,28 @@ static int client_receive_message_raw(sd_event_source *s, int fd,
>> >
>> > len -= DHCP_IP_UDP_SIZE;
>> >
>> > return client_handle_message(client, &packet->dhcp, len);
>> > }
>> >
>> > int sd_dhcp_client_start(sd_dhcp_client *client) {
>> > - char buffer[ETHER_ADDR_TO_STRING_MAX];
>> > int r;
>> >
>> > assert_return(client, -EINVAL);
>> >
>> > r = client_initialize(client);
>> > if (r < 0)
>> > 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_addr_to_string(&client->client_id.mac_addr, buffer));
>> > + 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 a6d6178..24fedd2 100644
>> > --- a/src/libsystemd-network/sd-dhcp-server.c
>> > +++ b/src/libsystemd-network/sd-dhcp-server.c
>> > @@ -388,16 +388,16 @@ 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);
>> > + be32toh(req->message->xid), 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);
>> >
>> > @@ -509,16 +509,16 @@ static int server_send_forcerenew(sd_dhcp_server *server, be32_t address,
>> > 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 63cdc7a..eac3844 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-dhcp4.c b/src/network/networkd-dhcp4.c
>> > index e451af8..63bfa86 100644
>> > --- a/src/network/networkd-dhcp4.c
>> > +++ b/src/network/networkd-dhcp4.c
>> > @@ -595,15 +595,17 @@ int dhcp4_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;
>> >
>> > diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
>> > index 427f695..0cc7231 100644
>> > --- a/src/network/networkd-link.c
>> > +++ b/src/network/networkd-link.c
>> > @@ -1647,15 +1647,17 @@ int link_update(Link *link, sd_rtnl_message *m) {
>> > strerror(-r));
>> > return r;
>> > }
>> > }
>> >
>> > if (link->dhcp_client) {
>> > r = sd_dhcp_client_set_mac(link->dhcp_client,
>> > - &link->mac);
>> > + (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);
>> > --
>> > 1.9.3
>> >
>> >
>> > _______________________________________________
>> > systemd-devel mailing list
>> > systemd-devel at lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/systemd-devel
>
>
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