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udhcp: add inline docs; small code shrink

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function                                             old     new   delta
send_packet                                          103      87     -16
udhcpc_main                                         2359    2323     -36
This commit is contained in:
Denis Vlasenko
2008-09-26 23:45:20 +00:00
parent 7d9399e8dc
commit 739e30fbc3
6 changed files with 64 additions and 41 deletions
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32
networking/udhcp/common.h
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@ -27,21 +27,23 @@ extern const uint8_t MAC_BCAST_ADDR[6]; /* six all-ones */
#define DHCP_OPTIONS_BUFSIZE 308
struct dhcpMessage {
uint8_t op;
uint8_t htype;
uint8_t hlen;
uint8_t hops;
uint32_t xid;
uint16_t secs;
uint16_t flags;
uint32_t ciaddr;
uint32_t yiaddr;
uint32_t siaddr;
uint32_t giaddr;
uint8_t chaddr[16];
uint8_t sname[64];
uint8_t file[128];
uint32_t cookie;
uint8_t op; /* 1 = BOOTREQUEST, 2 = BOOTREPLY */
uint8_t htype; /* hardware address type. 1 = 10mb ethernet */
uint8_t hlen; /* hardware address length */
uint8_t hops; /* used by relay agents only */
uint32_t xid; /* unique id */
uint16_t secs; /* elapsed since client began acquisition/renewal */
uint16_t flags; /* only one flag so far: */
#define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
uint32_t ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
uint32_t yiaddr; /* 'your' (client) IP address */
uint32_t siaddr; /* IP address of next server to use in bootstrap,
* returned in DHCPOFFER, DHCPACK by server */
uint32_t giaddr; /* relay agent IP address */
uint8_t chaddr[16];/* link-layer client hardware address (MAC) */
uint8_t sname[64]; /* server host name (ASCIZ) */
uint8_t file[128]; /* boot file name (ASCIZ) */
uint32_t cookie; /* fixed first four option bytes (99,130,83,99 dec) */
uint8_t options[DHCP_OPTIONS_BUFSIZE + CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
} PACKED;