From 324f818781a250b60f2fcfa74ff1c9101d2d1315 Mon Sep 17 00:00:00 2001 From: Tom Gundersen Date: Fri, 1 Aug 2014 16:10:13 +0200 Subject: sd-dhcp-client: allow the max dhcp message size to be set to the MTU of the link --- src/libsystemd-network/dhcp-protocol.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/libsystemd-network/dhcp-protocol.h') diff --git a/src/libsystemd-network/dhcp-protocol.h b/src/libsystemd-network/dhcp-protocol.h index f5119a7a5..abca9422c 100644 --- a/src/libsystemd-network/dhcp-protocol.h +++ b/src/libsystemd-network/dhcp-protocol.h @@ -60,7 +60,8 @@ typedef struct DHCPPacket DHCPPacket; #define DHCP_IP_SIZE (int32_t)(sizeof(struct iphdr)) #define DHCP_IP_UDP_SIZE (int32_t)(sizeof(struct udphdr) + DHCP_IP_SIZE) #define DHCP_MESSAGE_SIZE (int32_t)(sizeof(DHCPMessage)) -#define DHCP_MIN_OPTIONS_SIZE 308 /* spec says 312, but that includes the magic cookie */ +#define DHCP_DEFAULT_MIN_SIZE 576 /* the minimum internet hosts must be able to receive */ +#define DHCP_MIN_OPTIONS_SIZE DHCP_DEFAULT_MIN_SIZE - DHCP_IP_UDP_SIZE - DHCP_MESSAGE_SIZE #define DHCP_MAGIC_COOKIE (uint32_t)(0x63825363) enum { -- cgit v1.2.3