summaryrefslogtreecommitdiffstats
path: root/src/main.c
blob: ab2ceab9fe33c72db35061fba2772ba8982457f1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
/*
 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Development of this code funded by Astaro AG (http://www.astaro.com/)
 */

#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <fcntl.h>
#include <sys/types.h>

#include <nftables.h>
#include <utils.h>
#include <parser.h>
#include <rule.h>
#include <netlink.h>
#include <erec.h>

unsigned int numeric_output;
#ifdef DEBUG
unsigned int debug_level;
#endif

const char *include_paths[INCLUDE_PATHS_MAX] = { DEFAULT_INCLUDE_PATH };
static unsigned int num_include_paths = 1;

enum opt_vals {
	OPT_HELP		= 'h',
	OPT_VERSION		= 'v',
	OPT_FILE		= 'f',
	OPT_INTERACTIVE		= 'i',
	OPT_INCLUDEPATH		= 'I',
	OPT_NUMERIC		= 'n',
	OPT_DEBUG		= 'd',
	OPT_INVALID		= '?',
};

#define OPTSTRING	"hvf:iI:vn"

static const struct option options[] = {
	{
		.name		= "help",
		.val		= OPT_HELP,
	},
	{
		.name		= "version",
		.val		= OPT_VERSION,
	},
	{
		.name		= "file",
		.val		= OPT_FILE,
		.has_arg	= 1,
	},
	{
		.name		= "interactive",
		.val		= OPT_INTERACTIVE,
	},
	{
		.name		= "numeric",
		.val		= OPT_NUMERIC,
	},
	{
		.name		= "includepath",
		.val		= OPT_INCLUDEPATH,
		.has_arg	= 1,
	},
#ifdef DEBUG
	{
		.name		= "debug",
		.val		= OPT_DEBUG,
		.has_arg	= 1,
	},
#endif
	{
		.name		= NULL
	}
};

static void show_help(const char *name)
{
	printf(
"Usage: %s [ options ] [ cmds... ]\n"
"\n"
"Options:\n"
"  -h/--help			Show this help\n"
"  -v/--version			Show version information\n"
"\n"
"  -f/--file <filename>		Read input from <filename>\n"
"  -i/--interactive		Read input from interactive CLI\n"
"\n"
"  -n/--numeric			When specified once, show network addresses numerically.\n"
"  				When specified twice, also show Internet protocols,\n"
"				Internet services, user IDs and group IDs numerically.\n"
"  -I/--includepath <directory>	Add <directory> to the paths searched for include files.\n"
#ifdef DEBUG
"  --debug <level [,level...]>	Specify debugging level (scanner, parser, eval, netlink, all)\n"
#endif
"\n",
	name);
}

#ifdef DEBUG
static const struct {
	const char		*name;
	enum debug_level	level;
} debug_param[] = {
	{
		.name		= "scanner",
		.level		= DEBUG_SCANNER,
	},
	{
		.name		= "parser",
		.level		= DEBUG_PARSER,
	},
	{
		.name		= "eval",
		.level		= DEBUG_EVALUATION,
	},
	{
		.name		= "netlink",
		.level		= DEBUG_NETLINK,
	},
	{
		.name		= "all",
		.level		= ~0,
	},
};
#endif

static const struct input_descriptor indesc_cmdline = {
	.type	= INDESC_BUFFER,
	.name	= "<cmdline>",
};

int main(int argc, char * const *argv)
{
	struct parser_state state;
	struct eval_ctx ctx;
	void *scanner;
	LIST_HEAD(msgs);
	char *buf = NULL, *filename = NULL;
	unsigned int len;
	bool interactive = false;
	int i, val;
	int ret;

	while (1) {
		val = getopt_long(argc, argv, OPTSTRING, options, NULL);
		if (val == -1)
			break;

		switch (val) {
		case OPT_HELP:
			show_help(argv[0]);
			exit(NFT_EXIT_SUCCESS);
		case OPT_VERSION:
			printf("%s v%s (%s)\n",
			       PACKAGE_NAME, PACKAGE_VERSION, RELEASE_NAME);
			exit(NFT_EXIT_SUCCESS);
		case OPT_FILE:
			filename = optarg;
			break;
		case OPT_INTERACTIVE:
			interactive = true;
			break;
		case OPT_INCLUDEPATH:
			if (num_include_paths >= INCLUDE_PATHS_MAX) {
				fprintf(stderr, "Too many include paths "
						"specified, max. %u\n",
					INCLUDE_PATHS_MAX - 1);
				exit(NFT_EXIT_FAILURE);
			}
			include_paths[num_include_paths++] = optarg;
			break;
		case OPT_NUMERIC:
			numeric_output++;
			break;
#ifdef DEBUG
		case OPT_DEBUG:
			for (;;) {
				unsigned int i;
				char *end;

				end = strchr(optarg, ',');
				if (end)
					*end = '\0';

				for (i = 0; i < array_size(debug_param); i++) {
					if (strcmp(debug_param[i].name, optarg))
						continue;
					debug_level |= debug_param[i].level;
					break;
				}

				if (i == array_size(debug_param)) {
					fprintf(stderr, "invalid debug parameter `%s'\n",
						optarg);
					exit(NFT_EXIT_FAILURE);
				}

				if (end == NULL)
					break;
				optarg = end + 1;
			}
			break;
#endif
		case OPT_INVALID:
			exit(NFT_EXIT_FAILURE);
		}
	}

	parser_init(&state, &msgs);
	scanner = scanner_init(&state);

	if (optind != argc) {
		for (len = 0, i = optind; i < argc; i++)
			len += strlen(argv[i]) + strlen(" ");

		buf = xzalloc(len + 1);
		for (i = optind; i < argc; i++) {
			strcat(buf, argv[i]);
			if (i + 1 < argc)
				strcat(buf, " ");
		}

		scanner_push_buffer(scanner, &indesc_cmdline, buf);
	} else if (filename != NULL) {
		if (scanner_read_file(scanner, filename, &internal_location) < 0)
			goto out;
	} else if (interactive) {
		cli_init(scanner, &state);
	} else {
		fprintf(stderr, "%s: no command specified\n", argv[0]);
		exit(NFT_EXIT_FAILURE);
	}

	ret = nft_parse(scanner, &state);
	if (ret != 0)
		goto out;

	memset(&ctx, 0, sizeof(ctx));
	ctx.msgs = &msgs;
	if (evaluate(&ctx, &state.cmds) < 0)
		goto out;

	{
		struct netlink_ctx ctx;
		struct cmd *cmd, *next;

		list_for_each_entry_safe(cmd, next, &state.cmds, list) {
			memset(&ctx, 0, sizeof(ctx));
			ctx.msgs = &msgs;
			init_list_head(&ctx.list);
			if (do_command(&ctx, cmd) < 0)
				goto out;
			list_del(&cmd->list);
			cmd_free(cmd);
		}
	}
out:
	scanner_destroy(scanner);
	scope_release(&state.top_scope);
	erec_print_list(stdout, &msgs);

	xfree(buf);
	return 0;
}