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udhcp: pass pointer to whole packet to "add option" functions

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This is needed for "overflow option" support

function                                             old     new   delta
udhcp_find_option                                      -      34     +34
udhcp_add_binary_option                               94     106     +12
write_leases                                         227     223      -4
udhcp_init_header                                     86      82      -4
send_release                                         104      99      -5
init_packet                                           87      81      -6
add_client_options                                   160     154      -6
add_server_options                                   100      92      -8
udhcpd_main                                         1964    1954     -10
udhcpc_main                                         2859    2837     -22
find_option                                           34       -     -34
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/8 up/down: 46/-99)            Total: -53 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2010-03-26 09:32:09 +01:00
parent a8f6b99987
commit 7724c766bd
8 changed files with 37 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
networking/udhcp/common.c
View File

@ -226,14 +226,16 @@ int FAST_FUNC udhcp_end_option(uint8_t *optionptr)
/* Add an option (supplied in binary form) to the options.
* Option format: [code][len][data1][data2]..[dataLEN]
*/
void FAST_FUNC udhcp_add_binary_option(uint8_t *optionptr, uint8_t *addopt)
void FAST_FUNC udhcp_add_binary_option(struct dhcp_packet *packet, uint8_t *addopt)
{
unsigned len;
uint8_t *optionptr = packet->options;
unsigned end = udhcp_end_option(optionptr);
/* end position + option code/length + addopt length + end option */
len = OPT_DATA + addopt[OPT_LEN];
/* end position + (option code/length + addopt length) + end option */
if (end + len + 1 >= DHCP_OPTIONS_BUFSIZE) {
//TODO: learn how to use overflow option if we exhaust packet->options[]
bb_error_msg("option 0x%02x did not fit into the packet",
addopt[OPT_CODE]);
return;
@ -243,8 +245,8 @@ void FAST_FUNC udhcp_add_binary_option(uint8_t *optionptr, uint8_t *addopt)
optionptr[end + len] = DHCP_END;
}
/* Add a one to four byte option to a packet */
void FAST_FUNC udhcp_add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data)
/* Add an one to four byte option to a packet */
void FAST_FUNC udhcp_add_simple_option(struct dhcp_packet *packet, uint8_t code, uint32_t data)
{
const struct dhcp_option *dh;
@ -259,7 +261,7 @@ void FAST_FUNC udhcp_add_simple_option(uint8_t *optionptr, uint8_t code, uint32_
data <<= 8 * (4 - len);
/* Assignment is unaligned! */
move_to_unaligned32(&option[OPT_DATA], data);
udhcp_add_binary_option(optionptr, option);
udhcp_add_binary_option(packet, option);
return;
}
}
@ -268,7 +270,7 @@ void FAST_FUNC udhcp_add_simple_option(uint8_t *optionptr, uint8_t code, uint32_
}
/* Find option 'code' in opt_list */
struct option_set* FAST_FUNC find_option(struct option_set *opt_list, uint8_t code)
struct option_set* FAST_FUNC udhcp_find_option(struct option_set *opt_list, uint8_t code)
{
while (opt_list && opt_list->data[OPT_CODE] < code)
opt_list = opt_list->next;
@ -307,7 +309,7 @@ static NOINLINE void attach_option(
char *allocated = NULL;
#endif
existing = find_option(*opt_list, option->code);
existing = udhcp_find_option(*opt_list, option->code);
if (!existing) {
log2("Attaching option %02x to list", option->code);
#if ENABLE_FEATURE_UDHCP_RFC3397