diff options
Diffstat (limited to 'networking/udhcp/common.h')
| -rw-r--r-- | networking/udhcp/common.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h index 49a0b59..3ef371a 100644 --- a/networking/udhcp/common.h +++ b/networking/udhcp/common.h @@ -20,8 +20,11 @@ extern const uint8_t MAC_BCAST_ADDR[6] ALIGN2; /* six all-ones */ /*** DHCP packet ***/ +#define RFC1048_MAGIC 0x63825363 +/* RFC 1048 still uses BOOTP's small buffer (4 byte cookie + 60 the rest) */ +#define RFC1048_OPTIONS_BUFSIZE 60 + /* DHCP protocol. See RFC 2131 */ -#define DHCP_MAGIC 0x63825363 #define DHCP_OPTIONS_BUFSIZE 308 #define BOOTREQUEST 1 #define BOOTREPLY 2 @@ -57,8 +60,10 @@ struct dhcp_packet { * such as 'unix' or 'gateway'; this means 'boot the named program * configured for my machine'" */ - /* BOOTP fields end here, BOOTP says optional uint8_t vend[64] follows */ - uint32_t cookie; /* DHCP magic bytes: 99,130,83,99 decimal */ + /* BOOTP fields end here, BOOTP says optional uint8_t vend[64] follows. */ + /* RFC 1048 defined this cookie value and options 0-12 and 255. */ + /* DHCP extended it and required option 255 (END) to be always present. */ + uint32_t cookie; /* RFC 1048 magic bytes: 99,130,83,99 decimal */ uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS]; }; #define DHCP_PKT_SNAME_LEN 64 @@ -200,6 +205,9 @@ struct dhcp_scan_state { #define SNAME_FIELD 2 /* DHCP_MESSAGE_TYPE values */ +#if ENABLE_FEATURE_UDHCPD_BOOTP +#define MSGTYPE_BOOTP 0 /* there was no TYPE option in client's packet, assuming BOOTP */ +#endif #define DHCPDISCOVER 1 /* client -> server */ #define DHCPOFFER 2 /* client <- server */ #define DHCPREQUEST 3 /* client -> server */ |