xref: /freebsd/tests/sys/netinet/libalias/util.h (revision f1462ab0512c1a0e59f03a7a145df2889bed2997)
17b8696bfSLutz Donnerhacke /*
27b8696bfSLutz Donnerhacke  * SPDX-License-Identifier: BSD-3-Clause
37b8696bfSLutz Donnerhacke  *
47b8696bfSLutz Donnerhacke  * Copyright 2021 Lutz Donnerhacke
57b8696bfSLutz Donnerhacke  *
67b8696bfSLutz Donnerhacke  * Redistribution and use in source and binary forms, with or without
77b8696bfSLutz Donnerhacke  * modification, are permitted provided that the following conditions
87b8696bfSLutz Donnerhacke  * are met:
97b8696bfSLutz Donnerhacke  *
107b8696bfSLutz Donnerhacke  * 1. Redistributions of source code must retain the above copyright
117b8696bfSLutz Donnerhacke  *    notice, this list of conditions and the following disclaimer.
127b8696bfSLutz Donnerhacke  * 2. Redistributions in binary form must reproduce the above
137b8696bfSLutz Donnerhacke  *    copyright notice, this list of conditions and the following
147b8696bfSLutz Donnerhacke  *    disclaimer in the documentation and/or other materials provided
157b8696bfSLutz Donnerhacke  *    with the distribution.
167b8696bfSLutz Donnerhacke  * 3. Neither the name of the copyright holder nor the names of its
177b8696bfSLutz Donnerhacke  *    contributors may be used to endorse or promote products derived
187b8696bfSLutz Donnerhacke  *    from this software without specific prior written permission.
197b8696bfSLutz Donnerhacke  *
207b8696bfSLutz Donnerhacke  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
217b8696bfSLutz Donnerhacke  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
227b8696bfSLutz Donnerhacke  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
237b8696bfSLutz Donnerhacke  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
247b8696bfSLutz Donnerhacke  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
257b8696bfSLutz Donnerhacke  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
267b8696bfSLutz Donnerhacke  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
277b8696bfSLutz Donnerhacke  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
287b8696bfSLutz Donnerhacke  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
297b8696bfSLutz Donnerhacke  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
307b8696bfSLutz Donnerhacke  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
317b8696bfSLutz Donnerhacke  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
327b8696bfSLutz Donnerhacke  * SUCH DAMAGE.
337b8696bfSLutz Donnerhacke  */
34c1fbb54fSLutz Donnerhacke #include <sys/types.h>
35c1fbb54fSLutz Donnerhacke 
36c1fbb54fSLutz Donnerhacke #include <arpa/inet.h>
37c1fbb54fSLutz Donnerhacke #include <netinet/ip.h>
38c1fbb54fSLutz Donnerhacke #include <netinet/udp.h>
39c1fbb54fSLutz Donnerhacke 
40c1fbb54fSLutz Donnerhacke #ifndef _UTIL_H
41c1fbb54fSLutz Donnerhacke #define _UTIL_H
42c1fbb54fSLutz Donnerhacke 
43*f1462ab0SLutz Donnerhacke /* common ip ranges */
44*f1462ab0SLutz Donnerhacke extern struct in_addr masq, pub, prv1, prv2, prv3, cgn, ext, ANY_ADDR;
45*f1462ab0SLutz Donnerhacke 
46c1fbb54fSLutz Donnerhacke int		randcmp(const void *a, const void *b);
47c1fbb54fSLutz Donnerhacke void		hexdump(void *p, size_t len);
48*f1462ab0SLutz Donnerhacke struct ip *	ip_packet(u_char protocol, size_t len);
49c1fbb54fSLutz Donnerhacke struct udphdr * set_udp(struct ip *p, u_short sport, u_short dport);
50c1fbb54fSLutz Donnerhacke 
51c1fbb54fSLutz Donnerhacke inline int
52c1fbb54fSLutz Donnerhacke addr_eq(struct in_addr a, struct in_addr b)
53c1fbb54fSLutz Donnerhacke {
54c1fbb54fSLutz Donnerhacke 	return a.s_addr == b.s_addr;
55c1fbb54fSLutz Donnerhacke }
56c1fbb54fSLutz Donnerhacke 
57c1fbb54fSLutz Donnerhacke #define a2h(a)	ntohl(a.s_addr)
58c1fbb54fSLutz Donnerhacke 
59c1fbb54fSLutz Donnerhacke inline int
60c1fbb54fSLutz Donnerhacke rand_range(int min, int max)
61c1fbb54fSLutz Donnerhacke {
62c1fbb54fSLutz Donnerhacke 	return min + rand()%(max - min);
63c1fbb54fSLutz Donnerhacke }
64c1fbb54fSLutz Donnerhacke 
65*f1462ab0SLutz Donnerhacke #define NAT_CHECK(pip, src, dst, msq)	do {	\
66*f1462ab0SLutz Donnerhacke 	int res;				\
67*f1462ab0SLutz Donnerhacke 	int len = ntohs(pip->ip_len);		\
68*f1462ab0SLutz Donnerhacke 	pip->ip_src = src;			\
69*f1462ab0SLutz Donnerhacke 	pip->ip_dst = dst;			\
70*f1462ab0SLutz Donnerhacke 	res = LibAliasOut(la, pip, len);	\
71*f1462ab0SLutz Donnerhacke 	ATF_CHECK_MSG(res == PKT_ALIAS_OK,	\
72*f1462ab0SLutz Donnerhacke 	    ">%d< not met PKT_ALIAS_OK", res);	\
73*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(msq, pip->ip_src));	\
74*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(dst, pip->ip_dst));	\
75*f1462ab0SLutz Donnerhacke } while(0)
76*f1462ab0SLutz Donnerhacke 
77*f1462ab0SLutz Donnerhacke #define NAT_FAIL(pip, src, dst)	do {		\
78*f1462ab0SLutz Donnerhacke 	int res;				\
79*f1462ab0SLutz Donnerhacke 	int len = ntohs(pip->ip_len);		\
80*f1462ab0SLutz Donnerhacke 	pip->ip_src = src;			\
81*f1462ab0SLutz Donnerhacke 	pip->ip_dst = dst;			\
82*f1462ab0SLutz Donnerhacke 	res = LibAliasOut(la, pip, len);	\
83*f1462ab0SLutz Donnerhacke 	ATF_CHECK_MSG(res != PKT_ALIAS_OK),	\
84*f1462ab0SLutz Donnerhacke 	    ">%d< not met !PKT_ALIAS_OK", res);	\
85*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(src, pip->ip_src));	\
86*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(dst, pip->ip_dst));	\
87*f1462ab0SLutz Donnerhacke } while(0)
88*f1462ab0SLutz Donnerhacke 
89*f1462ab0SLutz Donnerhacke #define UNNAT_CHECK(pip, src, dst, rel)	do {	\
90*f1462ab0SLutz Donnerhacke 	int res;				\
91*f1462ab0SLutz Donnerhacke 	int len = ntohs(pip->ip_len);		\
92*f1462ab0SLutz Donnerhacke 	pip->ip_src = src;			\
93*f1462ab0SLutz Donnerhacke 	pip->ip_dst = dst;			\
94*f1462ab0SLutz Donnerhacke 	res = LibAliasIn(la, pip, len);		\
95*f1462ab0SLutz Donnerhacke 	ATF_CHECK_MSG(res == PKT_ALIAS_OK,	\
96*f1462ab0SLutz Donnerhacke 	    ">%d< not met PKT_ALIAS_OK", res);	\
97*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(src, pip->ip_src));	\
98*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(rel, pip->ip_dst));	\
99*f1462ab0SLutz Donnerhacke } while(0)
100*f1462ab0SLutz Donnerhacke 
101*f1462ab0SLutz Donnerhacke #define UNNAT_FAIL(pip, src, dst)	do {	\
102*f1462ab0SLutz Donnerhacke 	int res;				\
103*f1462ab0SLutz Donnerhacke 	int len = ntohs(pip->ip_len);		\
104*f1462ab0SLutz Donnerhacke 	pip->ip_src = src;			\
105*f1462ab0SLutz Donnerhacke 	pip->ip_dst = dst;			\
106*f1462ab0SLutz Donnerhacke 	res = LibAliasIn(la, pip, len);		\
107*f1462ab0SLutz Donnerhacke 	ATF_CHECK_MSG(res != PKT_ALIAS_OK,	\
108*f1462ab0SLutz Donnerhacke 	    ">%d< not met !PKT_ALIAS_OK", res);	\
109*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(src, pip->ip_src));	\
110*f1462ab0SLutz Donnerhacke 	ATF_CHECK(addr_eq(dst, pip->ip_dst));	\
111*f1462ab0SLutz Donnerhacke } while(0)
112*f1462ab0SLutz Donnerhacke 
113*f1462ab0SLutz Donnerhacke #define UDP_NAT_CHECK(p, u, si, sp, di, dp, mi)	do {	\
114*f1462ab0SLutz Donnerhacke 	u = set_udp(p, (sp), (dp));			\
115*f1462ab0SLutz Donnerhacke 	NAT_CHECK(p, (si), (di), (mi));			\
116*f1462ab0SLutz Donnerhacke 	ATF_CHECK(u->uh_dport == htons(dp));		\
117*f1462ab0SLutz Donnerhacke } while(0)
118*f1462ab0SLutz Donnerhacke 
119*f1462ab0SLutz Donnerhacke #define UDP_NAT_FAIL(p, u, si, sp, di, dp)	do {	\
120*f1462ab0SLutz Donnerhacke 	u = set_udp(p, (sp), (dp));			\
121*f1462ab0SLutz Donnerhacke 	NAT_FAIL(p, (si), (mi));			\
122*f1462ab0SLutz Donnerhacke } while(0)
123*f1462ab0SLutz Donnerhacke 
124*f1462ab0SLutz Donnerhacke #define UDP_UNNAT_CHECK(p, u, si, sp, mi, mp, di, dp)	\
125*f1462ab0SLutz Donnerhacke do {							\
126*f1462ab0SLutz Donnerhacke 	u = set_udp(p, (sp), (mp));			\
127*f1462ab0SLutz Donnerhacke 	UNNAT_CHECK(p, (si), (mi), (di));		\
128*f1462ab0SLutz Donnerhacke 	ATF_CHECK(u->uh_sport == htons(sp));		\
129*f1462ab0SLutz Donnerhacke 	ATF_CHECK(u->uh_dport == htons(dp));		\
130*f1462ab0SLutz Donnerhacke } while(0)
131*f1462ab0SLutz Donnerhacke 
132*f1462ab0SLutz Donnerhacke #define UDP_UNNAT_FAIL(p, u, si, sp, mi, mp)	do {	\
133*f1462ab0SLutz Donnerhacke 	u = set_udp(p, (sp), (mp));			\
134*f1462ab0SLutz Donnerhacke 	UNNAT_FAIL(p, (si), (mi));			\
135*f1462ab0SLutz Donnerhacke } while(0)
136*f1462ab0SLutz Donnerhacke 
137c1fbb54fSLutz Donnerhacke #endif /* _UTIL_H */
138