diff options
| -rw-r--r-- | src/libsystemd-dhcp/dhcp-packet.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/libsystemd-dhcp/dhcp-packet.c b/src/libsystemd-dhcp/dhcp-packet.c index 8f9ec43c43..13881ea0dd 100644 --- a/src/libsystemd-dhcp/dhcp-packet.c +++ b/src/libsystemd-dhcp/dhcp-packet.c @@ -164,7 +164,7 @@ int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len) { return -EINVAL; } - if (hdrlen + be16toh(packet->udp.len) > len) { + if (len < hdrlen + be16toh(packet->udp.len)) { log_dhcp_client(client, "ignoring packet: packet (%zu bytes) " "smaller than expected (%zu) by UDP header", len, hdrlen + be16toh(packet->udp.len)); @@ -182,10 +182,10 @@ int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len) { } } - if (be16toh(packet->udp.source) != DHCP_PORT_SERVER || - be16toh(packet->udp.dest) != DHCP_PORT_CLIENT) { - log_dhcp_client(client, "ignoring packet: wrong ports (source: %u, destination: %u)", - be16toh(packet->udp.source), be16toh(packet->udp.dest)); + if (be16toh(packet->udp.dest) != DHCP_PORT_CLIENT) { + log_dhcp_client(client, "ignoring packet: to port %u, which " + "is not the DHCP client port (%u)", + be16toh(packet->udp.dest), DHCP_PORT_CLIENT); return -EINVAL; } |