Blame src/driver/toks_driver_ctx.c

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/*********************************************************/
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/*  toksvc: a framework-native token broker service      */
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/*  Copyright (C) 2020  Z. Gilboa                        */
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/*  Released under GPLv2 and GPLv3; see COPYING.TOKSVC.  */
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/*********************************************************/
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#include <ntapi/ntapi.h>
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#include <ntapi/nt_atomic.h>
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#include <stdint.h>
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#include <toksvc/toksvc.h>
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#include "toksvc_init_impl.h"
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#include "toksvc_nolibc_impl.h"
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#define ARGV_DRIVER
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#include "toksvc_version.h"
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#include "toksvc_daemon_impl.h"
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#include "toksvc_dprintf_impl.h"
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#include "toksvc_driver_impl.h"
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#include "argv/argv.h"
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/* pty integration */
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#include <psxtypes/section/freestd.h>
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__attr_section_decl__(".freestd")
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static const nt_tty_affiliation tty_affiliation
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	__attr_section__(".freestd")
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	= NT_TTY_AFFILIATION_DEFAULT;
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/* ntapi accessor table */
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const ntapi_vtbl * toks_ntapi;
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/* daemon */
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static struct toks_daemon_ctx toks_daemon_ctx;
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static const  nt_guid toks_daemon_default_guid = TOKS_PORT_GUID_DAEMON;
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static const  wchar16_t toks_service_name[6]   = TOKS_PORT_NAME_PREFIX;
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/* package info */
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static const struct toks_source_version toks_src_version = {
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	TOKS_TAG_VER_MAJOR,
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	TOKS_TAG_VER_MINOR,
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	TOKS_TAG_VER_PATCH,
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	TOKSVC_GIT_VERSION
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};
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struct toks_driver_ctx_alloc {
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	struct argv_meta *		meta;
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	struct toks_driver_ctx_impl	ctx;
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	uint64_t			guard;
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};
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struct toks_split_vector {
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	char **		targv;
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	char **		eargv;
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};
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static uint32_t toks_argv_flags(uint32_t flags)
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{
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	uint32_t ret = ARGV_CLONE_VECTOR;
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	if (flags & TOKS_DRIVER_VERBOSITY_NONE)
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		ret |= ARGV_VERBOSITY_NONE;
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	if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
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		ret |= ARGV_VERBOSITY_ERRORS;
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	if (flags & TOKS_DRIVER_VERBOSITY_STATUS)
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		ret |= ARGV_VERBOSITY_STATUS;
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	return ret;
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}
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static int toks_driver_usage(
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	const char *			program,
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	const char *			arg,
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	const struct argv_option **	optv,
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	struct argv_meta *		meta)
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{
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	char header[512];
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	snprintf(header,sizeof(header),
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		"Usage: %s [options] <file>...\n" "Options:\n",
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		program);
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	argv_usage(STDOUT_FILENO,header,optv,arg);
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	argv_free(meta);
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	return TOKS_USAGE;
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}
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static int32_t toks_query_performance_counters_failover(nt_filetime * ticks)
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{
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	(void)ticks;
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	return 0;
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}
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static int32_t toks_daemon_library_once;
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static int32_t toks_daemon_library_init(void)
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{
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	int32_t		status;
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	int		argc;
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	char **		argv;
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	char **		envp;
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	nt_rtdata *	rtdata;
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	nt_timeout	timeout;
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	switch (at_locked_cas_32(&toks_daemon_library_once,0,1)) {
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		case 0:
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			status = ntapi->tt_get_argv_envp_utf8(
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				&argc,&argv,&envp,
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				0,0,0);
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			if (status) {
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				at_store_32(&toks_daemon_library_once,3);
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				return status;
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			}
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			if ((status = ntapi->tt_get_runtime_data(&rtdata,0))) {
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				at_store_32(&toks_daemon_library_once,3);
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				return status;
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			}
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			ntapi->tt_guid_copy(
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				&rtdata->srv_guid,
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				&toks_daemon_default_guid);
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			at_locked_inc_32(&toks_daemon_library_once);
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			return 0;
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		case 1:
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			timeout.quad = -10;
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			for (; (at_locked_cas_32(&toks_daemon_library_once,0,1) == 1); )
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				ntapi->zw_delay_execution(
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					NT_SYNC_ALERTABLE,
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					&timeout);
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			return (toks_daemon_library_once == 2)
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				? 0 : -1;
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		case 2:
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			return 0;
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		case 3:
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		default:
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			return -1;
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	}
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	return NT_STATUS_INTERNAL_ERROR;
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}
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static struct toks_driver_ctx_impl * toks_driver_ctx_alloc(
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	struct argv_meta *		meta,
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	const struct toks_common_ctx *	cctx)
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{
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	struct toks_driver_ctx_alloc *	ictx;
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	size_t				size;
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	nt_runtime_data *		rtdata;
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	switch (ntapi->tt_get_runtime_data(&rtdata,0)) {
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		case NT_STATUS_SUCCESS:
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			break;
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		case NT_STATUS_MORE_PROCESSING_REQUIRED:
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			toks_daemon_library_init();
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			if (ntapi->tt_get_runtime_data(&rtdata,0))
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				return 0;
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		default:
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			return 0;
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	}
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	size =  sizeof(struct toks_driver_ctx_alloc);
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	if (!(ictx = calloc(1,size)))
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		return 0;
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	if (cctx)
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		memcpy(&ictx->ctx.cctx,cctx,sizeof(*cctx));
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	ictx->ctx.ticks.qpc         = toks_query_performance_counters_failover;
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	ictx->ctx.ticks.pcfreq.quad = 0;
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	ictx->meta = meta;
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	ictx->ctx.rtdata = rtdata;
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	return &ictx->ctx;
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}
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static int toks_get_driver_ctx_fail(struct argv_meta * meta)
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{
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	argv_free(meta);
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	return -1;
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}
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#define TOKS_SARGV_ELEMENTS		1024
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static int toks_split_argv(
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	char **				argv,
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	struct toks_split_vector *	sargv)
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{
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	ptrdiff_t	argc;
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	char **		parg;
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	/* argc */
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	for (parg=argv; *parg; )
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		parg++;
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	if ((argc = parg - argv) >= TOKS_SARGV_ELEMENTS)
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		return -1;
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	/* clone argv into targv */
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	ntapi->tt_aligned_block_memset(
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		(uintptr_t *)sargv->targv,
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		0,TOKS_SARGV_ELEMENTS*sizeof(char *));
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	ntapi->tt_aligned_block_memcpy(
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		(uintptr_t *)sargv->targv,
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		(uintptr_t *)argv,
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		argc*sizeof(char *));
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	/* eargv */
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	for (parg=sargv->targv; *parg; parg++) {
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		if (!(strcmp(*parg,"-e")) || !(strcmp(*parg,"--exec"))) {
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			sargv->eargv = &argv[parg-sargv->targv];
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			sargv->eargv++;
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			*parg = 0;
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			return 0;
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		}
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	}
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	return 0;
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}
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int toks_get_driver_ctx(
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	char **				argv,
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	char **				envp,
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	uint32_t			flags,
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	struct toks_driver_ctx **	pctx)
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{
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	int32_t				status;
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	struct toks_driver_ctx_impl *	ctx;
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	struct toks_common_ctx		cctx;
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	struct toks_split_vector	sargv;
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	const struct argv_option *	optv[TOKS_OPTV_ELEMENTS];
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	struct argv_meta *		meta;
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	struct argv_entry *		entry;
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	struct argv_entry *		uuid;
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	struct argv_entry *		pid;
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	struct argv_entry *		msecs;
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	struct toks_token_string	key;
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	size_t				keylen;
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	nt_guid				svcguid;
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	const char *			program;
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	const char *			refstr;
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	const char *			ch;
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	int				ntokens;
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	int32_t				tokpid;
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	int64_t				timeout;
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	void *				hkernel32;
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	char *				targv[TOKS_SARGV_ELEMENTS];
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	(void)envp;
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	if (toks_init())
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		return -1;
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	argv_optv_init(toks_default_options,optv);
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	sargv.targv = targv;
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	sargv.eargv = 0;
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	if (toks_split_argv(argv,&sargv))
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		return -1;
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	if (!(meta = argv_get(
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			sargv.targv,optv,
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			toks_argv_flags(flags),
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			STDERR_FILENO)))
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		return -1;
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	if (!(flags & TOKS_DRIVER_MODE_CLIENT))
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		flags |= TOKS_DRIVER_MODE_SERVER;
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	uuid    = 0;
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	tokpid  = 0;
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	keylen  = 0;
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	ntokens = 0;
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	timeout = (-1);
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	program = argv_program_name(argv[0]);
618937
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	memset(&cctx,0,sizeof(cctx));
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	cctx.drvflags = flags;
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	cctx.eargv = sargv.eargv;
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	if (!argv[1] && (flags & TOKS_DRIVER_VERBOSITY_USAGE))
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		return toks_driver_usage(program,0,optv,meta);
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	for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
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		if (entry->fopt) {
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			switch (entry->tag) {
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				case TAG_HELP:
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					if (flags & TOKS_DRIVER_VERBOSITY_USAGE)
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						return toks_driver_usage(program,entry->arg,optv,meta);
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				case TAG_VERSION:
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					cctx.drvflags |= TOKS_DRIVER_VERSION;
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					break;
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				case TAG_DAEMON:
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					if (!strcmp("always",entry->arg))
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						cctx.drvflags |= TOKS_DRIVER_DAEMON_ALWAYS;
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					else if (!strcmp("never",entry->arg))
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						cctx.drvflags |= TOKS_DRIVER_DAEMON_NEVER;
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					break;
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				case TAG_SYSROOT:
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					cctx.sysroot = entry->arg;
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					break;
618937
618937
				case TAG_UUID:
618937
					uuid = entry;
618937
					break;
486fcd
79252f
				case TAG_REFSTR:
79252f
					refstr = entry->arg;
79252f
					break;
79252f
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				case TAG_PID:
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					pid = entry;
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					for (tokpid=0, ch=entry->arg; *ch && (tokpid>=0); ch++)
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						if ((*ch < '0') || (*ch >'9'))
e3e583
							tokpid = -1;
e3e583
						else
e3e583
							tokpid = tokpid * 10 + (*ch - '0');
e3e583
					break;
e3e583
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				case TAG_TIMEOUT:
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					msecs = entry;
b27e56
b27e56
					for (timeout=0, ch=entry->arg; *ch && (timeout>=0); ch++)
b27e56
						if ((*ch < '0') || (*ch >'9'))
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							timeout = -2;
b27e56
						else if ((ch - entry->arg) > 15)
b27e56
							timeout = -2;
b27e56
						else
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							timeout = timeout * 10 + (*ch - '0');
b27e56
b27e56
					break;
b27e56
c847e3
				case TAG_TOKENS:
c847e3
					for (ntokens=0, ch=entry->arg; *ch && (ntokens>=0); ch++)
c847e3
						if ((*ch < '0') || (*ch >'9'))
c847e3
							ntokens = -1;
c847e3
						else if (ntokens >= 1000)
c847e3
							ntokens = -1;
c847e3
						else
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							ntokens = ntokens * 10 + (*ch - '0');
c847e3
					break;
c847e3
486fcd
				case TAG_CONNECT:
486fcd
					cctx.drvflags &= ~(uint64_t)TOKS_DRIVER_MODE_SERVER;
486fcd
					cctx.drvflags |= TOKS_DRIVER_MODE_CLIENT;
486fcd
					break;
02451d
520f51
				case TAG_ABORT:
520f51
					cctx.drvflags &= ~(uint64_t)TOKS_DRIVER_MODE_SERVER;
520f51
					cctx.drvflags |= TOKS_DRIVER_MODE_CLIENT;
520f51
					cctx.drvflags |= TOKS_DRIVER_ACTION_ABORT;
520f51
					break;
520f51
02451d
				case TAG_ACQUIRE:
02451d
					cctx.drvflags &= ~(uint64_t)TOKS_DRIVER_MODE_SERVER;
02451d
					cctx.drvflags |= TOKS_DRIVER_MODE_CLIENT;
02451d
					cctx.drvflags |= TOKS_DRIVER_ACTION_ACQUIRE;
02451d
					break;
867b30
867b30
				case TAG_RELEASE:
867b30
					cctx.drvflags &= ~(uint64_t)TOKS_DRIVER_MODE_SERVER;
867b30
					cctx.drvflags |= TOKS_DRIVER_MODE_CLIENT;
867b30
					cctx.drvflags |= TOKS_DRIVER_ACTION_RELEASE;
867b30
867b30
					keylen = toks_strlen(entry->arg);
867b30
867b30
					ntapi->tt_generic_memset(
867b30
						&key,0,sizeof(key));
867b30
867b30
					if (keylen < sizeof(key.token))
867b30
						ntapi->tt_generic_memcpy(
867b30
							&key.token,entry->arg,
867b30
							keylen);
867b30
					break;
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			}
2420c2
		} else
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			/* strict */
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			return toks_driver_usage(program,0,optv,meta);
2420c2
	}
2420c2
e3e583
	if ((cctx.drvflags & TOKS_DRIVER_MODE_CLIENT) && (tokpid < 0)) {
e3e583
		if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
e3e583
			toks_dprintf(STDERR_FILENO,
e3e583
				"%s: error: %s is not a valid process id.",
e3e583
				program,pid->arg);
e3e583
		return toks_get_driver_ctx_fail(meta);
e3e583
	}
e3e583
b27e56
	if ((cctx.drvflags & TOKS_DRIVER_MODE_CLIENT) && (timeout < (-1))) {
b27e56
		if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
b27e56
			toks_dprintf(STDERR_FILENO,
b27e56
				"%s: error: %s is not a valid timeout in milliseconds.",
b27e56
				program,msecs->arg);
b27e56
		return toks_get_driver_ctx_fail(meta);
b27e56
	}
b27e56
c847e3
	if ((cctx.drvflags & TOKS_DRIVER_MODE_SERVER) && (ntokens <= 0)) {
c847e3
		if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
c847e3
			toks_dprintf(STDERR_FILENO,
c847e3
				"%s: error: number of tokens not set or is invalid.",
c847e3
				program);
c847e3
		return toks_get_driver_ctx_fail(meta);
c847e3
	}
c847e3
618937
	if (uuid && ntapi->tt_string_to_guid_utf8(uuid->arg,&svcguid)) {
618937
		if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
618937
			toks_dprintf(STDERR_FILENO,
618937
				"%s: error: '%s' is not a valid service guid (did you forget the braces?)",
618937
				program,uuid->arg);
618937
		return toks_get_driver_ctx_fail(meta);
618937
618937
	}
618937
2420c2
	if (cctx.sysroot && toks_open_dir(&cctx.hroot,0,cctx.sysroot,false)) {
2420c2
		if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
2420c2
			toks_dprintf(STDERR_FILENO,
2420c2
				"%s: error: could not open sysroot directory '%s'",
2420c2
				program,cctx.sysroot);
2420c2
		return toks_get_driver_ctx_fail(meta);
2420c2
	}
2420c2
2420c2
	if (!(ctx = toks_driver_ctx_alloc(meta,&cctx)))
2420c2
		return toks_get_driver_ctx_fail(meta);
2420c2
867b30
	if ((cctx.drvflags & TOKS_DRIVER_ACTION_RELEASE)) {
867b30
		if (toks_client_str_to_token(&ctx->ctx,&key)) {
867b30
			if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
867b30
				toks_dprintf(STDERR_FILENO,
867b30
					"%s: error: [%s] is not a valid token.",
867b30
					program,key.token);
867b30
			return toks_get_driver_ctx_fail(meta);
867b30
		}
867b30
	}
867b30
618937
	ntapi->tt_guid_copy(
618937
		&ctx->uuid,
618937
		uuid ? &svcguid : &ctx->rtdata->srv_guid);
618937
2f270e
	if ((toks_ntapi->tt_create_private_event(
2f270e
			&ctx->hevent,
2f270e
			NT_NOTIFICATION_EVENT,
2f270e
			NT_EVENT_NOT_SIGNALED)))
2f270e
		return toks_get_driver_ctx_fail(meta);
2f270e
00069c
	if ((ntapi->tt_open_dev_object_directory(
00069c
			&ctx->hsvcdir,
2c26a1
			NT_SEC_READ_CONTROL
2c26a1
				| NT_DIRECTORY_QUERY
2c26a1
				| NT_DIRECTORY_TRAVERSE
2c26a1
				| NT_DIRECTORY_CREATE_OBJECT
2c26a1
				| NT_DIRECTORY_CREATE_SUBDIRECTORY,
00069c
			toks_service_name,
00069c
			&toks_daemon_default_guid)))
00069c
		return toks_get_driver_ctx_fail(meta);
00069c
2f270e
	if ((hkernel32 = pe_get_kernel32_module_handle()))
2f270e
		if ((ctx->ticks.qpc = pe_get_procedure_address(
2f270e
				hkernel32,"QueryPerformanceCounter")))
2f270e
			ntapi->zw_query_performance_counter(
2f270e
				&(nt_filetime){{0,0}},
2f270e
				&ctx->ticks.pcfreq);
2f270e
e3e583
	ctx->tokpid             = tokpid;
c847e3
	ctx->ntokens            = ntokens;
b27e56
	ctx->timeout            = timeout;
2420c2
	ctx->ctx.program	= program;
2420c2
	ctx->ctx.cctx		= &ctx->cctx;
618937
	ctx->cctx.uuid          = &ctx->uuid;
2420c2
79252f
	toks_set_driver_refstr(&ctx->ctx,refstr);
79252f
c847e3
	if (cctx.drvflags & TOKS_DRIVER_MODE_SERVER) {
681a45
		if (!(ctx->waiters = toks_calloc(
681a45
				TOKS_MAX_WAITERS,
681a45
				sizeof(struct toks_waiter))))
d73408
			return toks_get_driver_ctx_fail(meta);
d73408
681a45
		toks_daemon_ctx.driver_ctx   = &ctx->ctx;
681a45
		toks_daemon_ctx.waiter_base  = ctx->waiters;
681a45
		toks_daemon_ctx.waiter_first = ctx->waiters;
681a45
		toks_daemon_ctx.waiter_next  = ctx->waiters;
681a45
		toks_daemon_ctx.waiter_cap   = &ctx->waiters[TOKS_MAX_WAITERS];
681a45
681a45
c847e3
		if (!(ctx->tokens = toks_calloc(ntokens,sizeof(*ctx->tokens))))
c847e3
			return toks_get_driver_ctx_fail(meta);
c847e3
f2a689
		if (toks_daemon_init(&toks_daemon_ctx,&ctx->uuid))
f2a689
			return toks_get_driver_ctx_fail(meta);
c847e3
	}
f2a689
2c9219
	if (cctx.drvflags & TOKS_DRIVER_MODE_CLIENT) {
3e9813
		if (cctx.drvflags & TOKS_DRIVER_DAEMON_ALWAYS) {
3e9813
			toks_daemon_ctx.driver_ctx = &ctx->ctx;
3e9813
3e9813
			switch ((status = toks_daemon_init(&toks_daemon_ctx,0))) {
3e9813
				case NT_STATUS_SUCCESS:
3e9813
					break;
3e9813
3e9813
				default:
3e9813
					if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
3e9813
						toks_dprintf(STDERR_FILENO,
3e9813
							"%s: error: failed to initialize signal handling "
3e9813
							"(check the system's documentation) [0x%x].",
3e9813
							program,status);
3e9813
3e9813
					return toks_get_driver_ctx_fail(meta);
3e9813
			}
3e9813
		}
3e9813
2c9219
		switch ((status = toks_client_connect(&ctx->ctx))) {
2c9219
			case NT_STATUS_SUCCESS:
2c9219
				break;
2c9219
2c9219
			case NT_STATUS_OBJECT_NAME_NOT_FOUND:
2c9219
				if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
2c9219
					toks_dprintf(STDERR_FILENO,
2c9219
						"%s: error: could not connect "
2c9219
						"(server not running) [0x%x].",
2c9219
						program,status);
2c9219
2c9219
				return toks_get_driver_ctx_fail(meta);
2c9219
2c9219
			case NT_STATUS_CONNECTION_REFUSED:
2c9219
			case NT_STATUS_PORT_CONNECTION_REFUSED:
2c9219
				if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
2c9219
					toks_dprintf(STDERR_FILENO,
2c9219
						"%s: error: could not connect "
2c9219
						"(connection refused) [0x%x].",
2c9219
						program,status);
2c9219
2c9219
				return toks_get_driver_ctx_fail(meta);
2c9219
2c9219
			case NT_STATUS_ACCESS_DENIED:
2c9219
				if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
2c9219
					toks_dprintf(STDERR_FILENO,
2c9219
						"%s: error: could not connect "
2c9219
						"(access denied) [0x%x].",
2c9219
						program,status);
2c9219
2c9219
				return toks_get_driver_ctx_fail(meta);
2c9219
2c9219
			default:
2c9219
				if (flags & TOKS_DRIVER_VERBOSITY_ERRORS)
2c9219
					toks_dprintf(STDERR_FILENO,
2c9219
						"%s: error: could not connect "
2c9219
						"(check the system's documentation) [0x%x].",
2c9219
						program,status);
2c9219
2c9219
				return toks_get_driver_ctx_fail(meta);
2c9219
		}
2c9219
	}
486fcd
2420c2
	*pctx = &ctx->ctx;
2420c2
	return TOKS_OK;
2420c2
}
2420c2
2420c2
static void toks_free_driver_ctx_impl(struct toks_driver_ctx_alloc * ictx)
2420c2
{
2f270e
	if (ictx->ctx.hevent)
2f270e
		ntapi->zw_close(ictx->ctx.hevent);
2f270e
00069c
	if (ictx->ctx.hsvcdir)
00069c
		ntapi->zw_close(ictx->ctx.hsvcdir);
00069c
00069c
	if (ictx->ctx.hsvclink)
00069c
		ntapi->zw_close(ictx->ctx.hsvclink);
00069c
aba5a2
	if (ictx->ctx.hservice)
aba5a2
		ntapi->zw_close(ictx->ctx.hservice);
aba5a2
c847e3
	if (ictx->ctx.tokens)
c847e3
		toks_free(ictx->ctx.tokens);
c847e3
d73408
	if (ictx->ctx.waiters)
d73408
		toks_free(ictx->ctx.waiters);
d73408
2420c2
	argv_free(ictx->meta);
2420c2
	free(ictx);
2420c2
}
2420c2
2420c2
void toks_free_driver_ctx(struct toks_driver_ctx * ctx)
2420c2
{
2420c2
	struct toks_driver_ctx_alloc *	ictx;
2420c2
	uintptr_t			addr;
2420c2
2420c2
	if (ctx) {
2420c2
		addr = (uintptr_t)ctx - offsetof(struct toks_driver_ctx_impl,ctx);
2420c2
		addr = addr - offsetof(struct toks_driver_ctx_alloc,ctx);
2420c2
		ictx = (struct toks_driver_ctx_alloc *)addr;
2420c2
		toks_free_driver_ctx_impl(ictx);
2420c2
	}
2420c2
}
2420c2
b27e56
void toks_driver_set_timeout(struct toks_driver_ctx * dctx, int64_t millisecs)
b27e56
{
b27e56
	toks_set_driver_timeout(dctx,millisecs);
b27e56
}
b27e56
b27e56
void toks_driver_unset_timeout(struct toks_driver_ctx * dctx)
b27e56
{
b27e56
	toks_set_driver_timeout(dctx,(-1));
b27e56
}
b27e56
2420c2
const struct toks_source_version * toks_source_version(void)
2420c2
{
2420c2
	return &toks_src_version;
2420c2
}