busybox/networking/udhcp/dhcpc.h
Denys Vlasenko 827b690fa7 udhcpc[6]: do not pass xid around, keep it in client_data.xid
function                                             old     new   delta
perform_release                                      105     169     +64
perform_d6_release                                   259     262      +3
init_d6_packet                                        84      85      +1
send_d6_discover                                     286     285      -1
send_d6_select                                       128     126      -2
send_d6_renew                                        176     174      -2
send_d6_info_request                                  65      63      -2
udhcpc_main                                         2555    2551      -4
send_select                                          130     122      -8
send_renew                                            99      91      -8
send_discover                                         89      81      -8
udhcpc6_main                                        2636    2602     -34
send_release                                          74       -     -74
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 3/9 up/down: 68/-143)           Total: -75 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-15 01:06:42 +02:00

45 lines
1.4 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#ifndef UDHCP_DHCPC_H
#define UDHCP_DHCPC_H 1
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
struct client_data_t {
uint8_t client_mac[6]; /* Our mac address */
IF_FEATURE_UDHCP_PORT(uint16_t port;)
int ifindex; /* Index number of the interface to use */
uint32_t xid;
uint8_t opt_mask[256 / 8]; /* Bitmask of options to send (-O option) */
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ TODO: DHCPv6 has 16-bit option numbers
const char *interface; /* The name of the interface to use */
char *pidfile; /* Optionally store the process ID */
const char *script; /* User script to run at dhcp events */
struct option_set *options; /* list of DHCP options to send to server */
llist_t *envp; /* list of DHCP options used for env vars */
unsigned first_secs;
unsigned last_secs;
int sockfd;
smallint listen_mode;
smallint state;
} FIX_ALIASING;
/* server_config sits in 1st half of bb_common_bufsiz1 */
#define client_data (*(struct client_data_t*)(&bb_common_bufsiz1[COMMON_BUFSIZE / 2]))
#if ENABLE_FEATURE_UDHCP_PORT
#define CLIENT_PORT (client_data.port)
#define CLIENT_PORT6 (client_data.port)
#else
#define CLIENT_PORT 68
#define CLIENT_PORT6 546
#endif
POP_SAVED_FUNCTION_VISIBILITY
#endif