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path: root/src/libsystemd-network/sd-dhcp-client.c
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Diffstat (limited to 'src/libsystemd-network/sd-dhcp-client.c')
-rw-r--r--src/libsystemd-network/sd-dhcp-client.c74
1 files changed, 57 insertions, 17 deletions
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 2f94c16078..0eba4c379d 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -23,6 +23,7 @@
#include <stdio.h>
#include <net/ethernet.h>
#include <net/if_arp.h>
+#include <linux/if_infiniband.h>
#include <netinet/ether.h>
#include <sys/param.h>
#include <sys/ioctl.h>
@@ -37,6 +38,8 @@
#include "dhcp-lease-internal.h"
#include "sd-dhcp-client.h"
+#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN
+
struct sd_dhcp_client {
RefCount n_ref;
@@ -57,6 +60,9 @@ struct sd_dhcp_client {
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;
@@ -163,15 +169,25 @@ int sd_dhcp_client_set_index(sd_dhcp_client *client, int 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 (arp_type == ARPHRD_ETHER)
+ assert_return(addr_len == ETH_ALEN, -EINVAL);
+ else if (arp_type == ARPHRD_INFINIBAND)
+ assert_return(addr_len == INFINIBAND_ALEN, -EINVAL);
+ else
+ return -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)) {
@@ -181,6 +197,10 @@ int sd_dhcp_client_set_mac(sd_dhcp_client *client,
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;
@@ -318,7 +338,7 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
return -ENOMEM;
r = dhcp_message_init(&packet->dhcp, BOOTREQUEST, client->xid, type,
- optlen, &optoffset);
+ client->arp_type, optlen, &optoffset);
if (r < 0)
return r;
@@ -337,14 +357,17 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
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->arp_type == ARPHRD_ETHER)
+ 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 */
@@ -843,7 +866,9 @@ static int client_start(sd_dhcp_client *client) {
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;
@@ -887,7 +912,9 @@ static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata)
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;
@@ -1331,6 +1358,9 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
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);
@@ -1367,13 +1397,26 @@ static int client_receive_message_udp(sd_event_source *s, int fd,
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 (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], &client->client_id.mac_addr,
- ETH_ALEN)) {
+ if (memcmp(&message->chaddr[0], expected_chaddr, ETH_ALEN)) {
log_dhcp_client(client, "received chaddr does not match "
"expected: ignoring");
return 0;
@@ -1455,7 +1498,6 @@ static int client_receive_message_raw(sd_event_source *s, int fd,
}
int sd_dhcp_client_start(sd_dhcp_client *client) {
- char buffer[ETHER_ADDR_TO_STRING_MAX];
int r;
assert_return(client, -EINVAL);
@@ -1469,9 +1511,7 @@ int sd_dhcp_client_start(sd_dhcp_client *client) {
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;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-13 11:19:24 +0000