diff options
Diffstat (limited to 'src/libsystemd-network/sd-dhcp-client.c')
| -rw-r--r-- | src/libsystemd-network/sd-dhcp-client.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c index 06b2d1c60d..5824e6ee91 100644 --- a/src/libsystemd-network/sd-dhcp-client.c +++ b/src/libsystemd-network/sd-dhcp-client.c @@ -22,6 +22,7 @@ #include <string.h> #include <stdio.h> #include <net/ethernet.h> +#include <net/if_arp.h> #include <sys/param.h> #include <sys/ioctl.h> @@ -936,6 +937,11 @@ static int client_handle_message(sd_dhcp_client *client, DHCPMessage *message, return 0; } + if (be32toh(message->magic) != DHCP_MAGIC_COOKIE) { + log_dhcp_client(client, "not a DHCP message: ignoring"); + return 0; + } + if (message->op != BOOTREPLY) { log_dhcp_client(client, "not a BOOTREPLY message: ignoring"); return 0; @@ -948,6 +954,11 @@ static int client_handle_message(sd_dhcp_client *client, DHCPMessage *message, return 0; } + if (message->htype != ARPHRD_ETHER || message->hlen != ETHER_ADDR_LEN) { + log_dhcp_client(client, "not an ethernet packet"); + return 0; + } + if (memcmp(&message->chaddr[0], &client->client_id.mac_addr, ETH_ALEN)) { log_dhcp_client(client, "received chaddr does not match " |