1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/nf-exp-add.c     Create an expectation
4  *
5  *	This library is free software; you can redistribute it and/or
6  *	modify it under the terms of the GNU Lesser General Public
7  *	License as published by the Free Software Foundation version 2.1
8  *	of the License.
9  *
10  * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
11  * Copyright (c) 2007 Philip Craig <philipc@snapgear.com>
12  * Copyright (c) 2007 Secure Computing Corporation
13  * Copyright (c) 2012 Rich Fought <rich.fought@watchguard.com>
14  *
15  */
16 
17 #include <netlink/cli/utils.h>
18 #include <netlink/cli/exp.h>
19 
20 #include <linux/netlink.h>
21 
22 static int quiet = 0;
23 
print_usage(void)24 static void print_usage(void)
25 {
26 	printf(
27 	"Usage: nf-exp-list [OPTION]... [CONNTRACK ENTRY]\n"
28 	"\n"
29 	"Options\n"
30 	"     --replace             Replace the address if it exists.\n"
31 	" -q, --quiet               Do not print informal notifications.\n"
32 	" -h, --help            Show this help\n"
33 	" -v, --version         Show versioning information\n"
34 	"\n"
35 	"Expectation Selection\n"
36 	" -i, --id=NUM                Identifier\n"
37 	"     --expect-proto=PROTOCOL Expectation protocol\n"
38 	"     --expect-src=ADDR       Expectation source address\n"
39 	"     --expect-sport=PORT     Expectation source port\n"
40 	"     --expect-dst=ADDR       Expectation destination address\n"
41 	"     --expect-dport=PORT     Expectation destination port\n"
42 	"     --master-proto=PROTOCOL Master conntrack protocol\n"
43 	"     --master-src=ADDR       Master conntrack source address\n"
44 	"     --master-sport=PORT     Master conntrack source port\n"
45 	"     --master-dst=ADDR       Master conntrack destination address\n"
46 	"     --master-dport=PORT     Master conntrack destination port\n"
47 	"     --mask-proto=PROTOCOL   Mask protocol\n"
48 	"     --mask-src=ADDR         Mask source address\n"
49 	"     --mask-sport=PORT       Mask source port\n"
50 	"     --mask-dst=ADDR         Mask destination address\n"
51 	"     --mask-dport=PORT       Mask destination port\n"
52 	" -F, --family=FAMILY         Address family\n"
53 	"     --timeout=NUM           Timeout value\n"
54 	"     --helper=STRING         Helper Name\n"
55 	"     --flags                 Flags (Kernel 2.6.37)\n"
56 	);
57 	exit(0);
58 }
59 
main(int argc,char * argv[])60 int main(int argc, char *argv[])
61 {
62 	struct nl_sock *sock;
63 	struct nfnl_exp *exp;
64 	struct nl_dump_params params = {
65 		.dp_type = NL_DUMP_LINE,
66 		.dp_fd = stdout,
67 	};
68 	int err, nlflags = NLM_F_CREATE;
69 
70 	exp = nl_cli_exp_alloc();
71 
72 	for (;;) {
73 		int c, optidx = 0;
74 		enum {
75 			ARG_MARK = 270,
76 			ARG_TCP_STATE = 271,
77 			ARG_EXPECT_PROTO,
78 			ARG_EXPECT_SRC,
79 			ARG_EXPECT_SPORT,
80 			ARG_EXPECT_DST,
81 			ARG_EXPECT_DPORT,
82 			ARG_MASTER_PROTO,
83 			ARG_MASTER_SRC,
84 			ARG_MASTER_SPORT,
85 			ARG_MASTER_DST,
86 			ARG_MASTER_DPORT,
87 			ARG_MASK_PROTO,
88 			ARG_MASK_SRC,
89 			ARG_MASK_SPORT,
90 			ARG_MASK_DST,
91 			ARG_MASK_DPORT,
92 			ARG_NAT_PROTO,
93 			ARG_NAT_SRC,
94 			ARG_NAT_SPORT,
95 			ARG_NAT_DST,
96 			ARG_NAT_DPORT,
97 			ARG_NAT_DIR,
98 			ARG_TIMEOUT,
99 			ARG_HELPER_NAME,
100 			ARG_REPLACE,
101 			ARG_FLAGS,
102 		};
103 		static struct option long_opts[] = {
104 			{ "replace", 1, 0, ARG_REPLACE },
105 			{ "quiet", 0, 0, 'q' },
106 			{ "help", 0, 0, 'h' },
107 			{ "version", 0, 0, 'v' },
108 			{ "id", 1, 0, 'i' },
109 			{ "expect-proto", 1, 0, ARG_EXPECT_PROTO },
110 			{ "expect-src", 1, 0, ARG_EXPECT_SRC },
111 			{ "expect-sport", 1, 0, ARG_EXPECT_SPORT },
112 			{ "expect-dst", 1, 0, ARG_EXPECT_DST },
113 			{ "expect-dport", 1, 0, ARG_EXPECT_DPORT },
114 			{ "master-proto", 1, 0, ARG_MASTER_PROTO },
115 			{ "master-src", 1, 0, ARG_MASTER_SRC },
116 			{ "master-sport", 1, 0, ARG_MASTER_SPORT },
117 			{ "master-dst", 1, 0, ARG_MASTER_DST },
118 			{ "master-dport", 1, 0, ARG_MASTER_DPORT },
119 			{ "mask-proto", 1, 0, ARG_MASK_PROTO },
120 			{ "mask-src", 1, 0, ARG_MASK_SRC },
121 			{ "mask-sport", 1, 0, ARG_MASK_SPORT },
122 			{ "mask-dst", 1, 0, ARG_MASK_DST },
123 			{ "mask-dport", 1, 0, ARG_MASK_DPORT },
124 			{ "nat-proto", 1, 0, ARG_NAT_PROTO },
125 			{ "nat-src", 1, 0, ARG_NAT_SRC },
126 			{ "nat-sport", 1, 0, ARG_NAT_SPORT },
127 			{ "nat-dst", 1, 0, ARG_NAT_DST },
128 			{ "nat-dport", 1, 0, ARG_NAT_DPORT },
129 			{ "nat-dir", 1, 0, ARG_NAT_DIR },
130 			{ "family", 1, 0, 'F' },
131 			{ "timeout", 1, 0, ARG_TIMEOUT },
132 			{ "helper", 1, 0, ARG_HELPER_NAME },
133 			{ "flags", 1, 0, ARG_FLAGS},
134 			{ 0, 0, 0, 0 }
135 		};
136 
137 		c = getopt_long(argc, argv, "46f:hvi:p:F:", long_opts, &optidx);
138 		if (c == -1)
139 			break;
140 
141 		switch (c) {
142 		case '?': exit(NLE_INVAL);
143 		case ARG_REPLACE: nlflags |= NLM_F_REPLACE; break;
144 		case 'q': quiet = 1; break;
145 		case '4': nfnl_exp_set_family(exp, AF_INET); break;
146 		case '6': nfnl_exp_set_family(exp, AF_INET6); break;
147 		case 'h': print_usage(); break;
148 		case 'v': nl_cli_print_version(); break;
149 		case 'i': nl_cli_exp_parse_id(exp, optarg); break;
150 		case ARG_EXPECT_PROTO: nl_cli_exp_parse_l4protonum(exp, NFNL_EXP_TUPLE_EXPECT, optarg); break;
151 		case ARG_EXPECT_SRC: nl_cli_exp_parse_src(exp, NFNL_EXP_TUPLE_EXPECT, optarg); break;
152 		case ARG_EXPECT_SPORT: nl_cli_exp_parse_src_port(exp, NFNL_EXP_TUPLE_EXPECT, optarg); break;
153 		case ARG_EXPECT_DST: nl_cli_exp_parse_dst(exp, NFNL_EXP_TUPLE_EXPECT, optarg); break;
154 		case ARG_EXPECT_DPORT: nl_cli_exp_parse_dst_port(exp, NFNL_EXP_TUPLE_EXPECT, optarg); break;
155 		case ARG_MASTER_PROTO: nl_cli_exp_parse_l4protonum(exp, NFNL_EXP_TUPLE_MASTER, optarg); break;
156 		case ARG_MASTER_SRC: nl_cli_exp_parse_src(exp, NFNL_EXP_TUPLE_MASTER, optarg); break;
157 		case ARG_MASTER_SPORT: nl_cli_exp_parse_src_port(exp, NFNL_EXP_TUPLE_MASTER, optarg); break;
158 		case ARG_MASTER_DST: nl_cli_exp_parse_dst(exp, NFNL_EXP_TUPLE_MASTER, optarg); break;
159 		case ARG_MASTER_DPORT: nl_cli_exp_parse_dst_port(exp, NFNL_EXP_TUPLE_MASTER, optarg); break;
160 		case ARG_MASK_PROTO: nl_cli_exp_parse_l4protonum(exp, NFNL_EXP_TUPLE_MASK, optarg); break;
161 		case ARG_MASK_SRC: nl_cli_exp_parse_src(exp, NFNL_EXP_TUPLE_MASK, optarg); break;
162 		case ARG_MASK_SPORT: nl_cli_exp_parse_src_port(exp, NFNL_EXP_TUPLE_MASK, optarg); break;
163 		case ARG_MASK_DST: nl_cli_exp_parse_dst(exp, NFNL_EXP_TUPLE_MASK, optarg); break;
164 		case ARG_MASK_DPORT: nl_cli_exp_parse_dst_port(exp, NFNL_EXP_TUPLE_MASK, optarg); break;
165 		case ARG_NAT_PROTO: nl_cli_exp_parse_l4protonum(exp, NFNL_EXP_TUPLE_NAT, optarg); break;
166 		case ARG_NAT_SRC: nl_cli_exp_parse_src(exp, NFNL_EXP_TUPLE_NAT, optarg); break;
167 		case ARG_NAT_SPORT: nl_cli_exp_parse_src_port(exp, NFNL_EXP_TUPLE_NAT, optarg); break;
168 		case ARG_NAT_DST: nl_cli_exp_parse_dst(exp, NFNL_EXP_TUPLE_NAT, optarg); break;
169 		case ARG_NAT_DPORT: nl_cli_exp_parse_dst_port(exp, NFNL_EXP_TUPLE_NAT, optarg); break;
170 		case ARG_NAT_DIR: nl_cli_exp_parse_nat_dir(exp, optarg); break;
171 		case 'F': nl_cli_exp_parse_family(exp, optarg); break;
172 		case ARG_TIMEOUT: nl_cli_exp_parse_timeout(exp, optarg); break;
173 		case ARG_HELPER_NAME: nl_cli_exp_parse_helper_name(exp, optarg); break;
174 		case ARG_FLAGS: nl_cli_exp_parse_flags(exp, optarg); break;
175 		}
176 	}
177 
178 	sock = nl_cli_alloc_socket();
179 	nl_cli_connect(sock, NETLINK_NETFILTER);
180 
181 	if ((err = nfnl_exp_add(sock, exp, nlflags)) < 0)
182 		nl_cli_fatal(err, "Unable to add expectation: %s", nl_geterror(err));
183 
184 	if (!quiet) {
185 		printf("Added ");
186 		nl_object_dump(OBJ_CAST(exp), &params);
187 	}
188 
189 	return 0;
190 }
191