networking/udhcp/dhcpc.h

/* 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 clientid[2+2 + 6];      /* Our mac address (prefixed by padding used for client-id) */
#define client_data_client_mac (client_data.clientid + 2+2)
	IF_FEATURE_UDHCP_PORT(uint16_t port;)
	int ifindex;                    /* Index number of the interface to use */
	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 */
	uint8_t *fqdn;                  /* Optional fully qualified domain name to use */
	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