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authorDenys Vlasenko2010-03-26 09:32:09 +0100
committerDenys Vlasenko2010-03-26 09:32:09 +0100
commit7724c766bdfba5f3af5cdf5d869bcf03f45149e3 (patch)
treed1cb0db7b683bdc9c9ecb954cc83dea7d53ae440 /networking/udhcp/common.c
parenta8f6b9998727ad67db4b812270a1bbceea011dde (diff)
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udhcp: pass pointer to whole packet to "add option" functions
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>
Diffstat (limited to 'networking/udhcp/common.c')
-rw-r--r--networking/udhcp/common.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index bc458ac..9316774 100644
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -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