ndhc/state.h

// Copyright 2011-2020 Nicholas J. Kain <njkain at gmail dot com>
// SPDX-License-Identifier: MIT
#ifndef NDHC_STATE_H_
#define NDHC_STATE_H_

#include "ndhc.h"
#include "dhcp.h"

#define COR_SUCCESS 0
#define COR_ERROR -1

int dhcp_handle(struct client_state_t *cs, long long nowts,
                bool sev_dhcp, struct dhcpmsg *dhcp_packet,
                uint8_t dhcp_msgtype, uint32_t dhcp_srcaddr, bool sev_arp,
                bool force_fingerprint, bool dhcp_timeout, bool arp_timeout);

#endif
Relicense as MIT. It's a lot more common than BSD 2-clause it is both compatible and nearly identical in effect. 2022-02-07 06:35:29 +05:30			`// Copyright 2011-2020 Nicholas J. Kain <njkain at gmail dot com>`
			`// SPDX-License-Identifier: MIT`
Centralize DHCP timeout, packet reciept, and user-demanded action handling into state.[ch]. Remove timeout.c. 2011-06-30 09:17:31 +05:30			`#ifndef NDHC_STATE_H_`
			`#define NDHC_STATE_H_`

Merge config.h into ndhc.h. 2014-03-13 02:35:43 +05:30			`#include "ndhc.h"`
Rename packet.[ch] to dhcp.[ch]. 2011-07-02 13:21:44 +05:30			`#include "dhcp.h"`
Centralize DHCP timeout, packet reciept, and user-demanded action handling into state.[ch]. Remove timeout.c. 2011-06-30 09:17:31 +05:30
Use a coroutine instead of several callback state machines. This change makes it much easier to reason about ndhc's behavior and properly handle errors. It is a very large changeset, but there is no way to make this sort of change incrementally. Lease acquisition is tested to work. It is highly likely that some bugs were both introduced and squashed here. Some obvious code cleanups will quickly follow. 2015-02-18 16:01:13 +05:30			`#define COR_SUCCESS 0`
			`#define COR_ERROR -1`
Centralize DHCP timeout, packet reciept, and user-demanded action handling into state.[ch]. Remove timeout.c. 2011-06-30 09:17:31 +05:30
Replace mostly obsolete -[static 1] with reliable old *-. This notation originally had the sole advantage of implying that the pointer was non-NULL, but it has seen little use and now clang presents warnings about it in certain contexts. 2022-01-12 09:05:19 +05:30			`int dhcp_handle(struct client_state_t *cs, long long nowts,`
			`bool sev_dhcp, struct dhcpmsg *dhcp_packet,`
Fix the return values of dhcp_packet_get and arp_packet_get. This corrects a bug where stale dhcp packets would get reprocessed, causing very bad behavior; an issue that was introduced in the coroutine conversion. 2015-02-18 21:32:13 +05:30			`uint8_t dhcp_msgtype, uint32_t dhcp_srcaddr, bool sev_arp,`
Stop using signalfd and audit signal handling code. There's really no advantage to using signalfd in ndhc, particularly since the normal POSIX signal API is now used for handling SIGCHLD in ndhc-master. So just use the tried and true volatile sig_atomic_t set and check approach. The only intended behavior change is in the dhcp RELEASE state -- before there would be a spurious attempt at renewing a nonexistent lease when the RENEW signal was received. 2020-10-20 13:53:55 +05:30			`bool force_fingerprint, bool dhcp_timeout, bool arp_timeout);`
Move dhcp state handling code out of netlink.c and into state.c. netlink.c now just calls hooks exposed by state.c, just like the dhcp packet, poll timeout, and signal code. Make ifchange_deconfig() idempotent. 2011-07-05 07:40:14 +05:30
Centralize DHCP timeout, packet reciept, and user-demanded action handling into state.[ch]. Remove timeout.c. 2011-06-30 09:17:31 +05:30			`#endif`