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dhcp: heed TODO item - divorced options from their string descriptions

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code shrink while at it.

function                                             old     new   delta
dhcp_option_strings                                    -     258    +258
udhcp_run_script                                    1135    1174     +39
dhcp_option_lengths                                    -      11     +11
udhcp_add_simple_option                               93      92      -1
packet_num                                             4       -      -4
read_opt                                             746     739      -7
udhcp_option_lengths                                  11       -     -11
udhcpc_main                                         2590    2494     -96
dhcp_options                                         490      70    -420
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 1/4 up/down: 308/-539)         Total: -231 bytes
   text    data     bss     dec     hex filename
 775309     929    9100  785338   bfbba busybox_old
 775098     929    9084  785111   bfad7 busybox_unstripped
This commit is contained in:
Denis Vlasenko
2007-11-29 08:17:45 +00:00
parent 64309f8669
commit b539c8452f
8 changed files with 135 additions and 88 deletions
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22
networking/udhcp/script.c
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@@ -33,7 +33,7 @@ static const uint8_t max_option_length[] = {
static inline int upper_length(int length, int opt_index)
{
return max_option_length[opt_index] *
(length / option_lengths[opt_index]);
(length / dhcp_option_lengths[opt_index]);
}
@@ -57,7 +57,7 @@ static int mton(uint32_t mask)
/* Allocate and fill with the text of option 'option'. */
static char *alloc_fill_opts(uint8_t *option, const struct dhcp_option *type_p)
static char *alloc_fill_opts(uint8_t *option, const struct dhcp_option *type_p, const char *opt_name)
{
int len, type, optlen;
uint16_t val_u16;
@@ -68,10 +68,10 @@ static char *alloc_fill_opts(uint8_t *option, const struct dhcp_option *type_p)
len = option[OPT_LEN - 2];
type = type_p->flags & TYPE_MASK;
optlen = option_lengths[type];
optlen = dhcp_option_lengths[type];
dest = ret = xmalloc(upper_length(len, type) + strlen(type_p->opt_name) + 2);
dest += sprintf(ret, "%s=", type_p->opt_name);
dest = ret = xmalloc(upper_length(len, type) + strlen(opt_name) + 2);
dest += sprintf(ret, "%s=", opt_name);
for (;;) {
switch (type) {
@@ -133,6 +133,7 @@ static char **fill_envp(struct dhcpMessage *packet)
int i, j;
char **envp;
char *var;
const char *opt_name;
uint8_t *temp;
char over = 0;
@@ -171,11 +172,13 @@ static char **fill_envp(struct dhcpMessage *packet)
envp[j] = xmalloc(sizeof("ip=255.255.255.255"));
sprintip(envp[j++], "ip=", (uint8_t *) &packet->yiaddr);
for (i = 0; dhcp_options[i].code; i++) {
opt_name = dhcp_option_strings;
i = 0;
while (*opt_name) {
temp = get_option(packet, dhcp_options[i].code);
if (!temp)
continue;
envp[j++] = alloc_fill_opts(temp, &dhcp_options[i]);
goto next;
envp[j++] = alloc_fill_opts(temp, &dhcp_options[i], opt_name);
/* Fill in a subnet bits option for things like /24 */
if (dhcp_options[i].code == DHCP_SUBNET) {
@@ -183,6 +186,9 @@ static char **fill_envp(struct dhcpMessage *packet)
memcpy(&subnet, temp, 4);
envp[j++] = xasprintf("mask=%d", mton(subnet));
}
next:
opt_name += strlen(opt_name) + 1;
i++;
}
if (packet->siaddr) {
envp[j] = xmalloc(sizeof("siaddr=255.255.255.255"));