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udhcpc: support for -O <option>.

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Two important notes:
* nissrv and nisdomain are not requested by default anymore!
* inconsistency between "XXXsvr" and "XXsrv" in option names resolved,
  all are "XXXsrv" now.

function                                             old     new   delta
udhcpc_main                                         2494    2600    +106
packed_usage                                       23023   23067     +44
add_requests                                          91     119     +28
static.udhcpc_longopts                               209     226     +17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 195/0)             Total: 195 bytes
This commit is contained in:
Denis Vlasenko
2007-12-10 07:03:38 +00:00
parent 75aa615bef
commit 191836845e
5 changed files with 97 additions and 78 deletions
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11
networking/udhcp/clientpacket.c
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@@ -57,13 +57,18 @@ static void init_packet(struct dhcpMessage *packet, char type)
* goes towards the head of the packet. */
static void add_requests(struct dhcpMessage *packet)
{
uint8_t c;
int end = end_option(packet->options);
int i, len = 0;
packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
for (i = 0; dhcp_options[i].code; i++)
if (dhcp_options[i].flags & OPTION_REQ)
packet->options[end + OPT_DATA + len++] = dhcp_options[i].code;
for (i = 0; (c = dhcp_options[i].code) != 0; i++) {
if (dhcp_options[i].flags & OPTION_REQ
|| (client_config.opt_mask[c >> 3] & (1 << (c & 7)))
) {
packet->options[end + OPT_DATA + len++] = c;
}
}
packet->options[end + OPT_LEN] = len;
packet->options[end + OPT_DATA + len] = DHCP_END;