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Index: tests/sys/netinet/libalias/2_natout.c
===================================================================
--- /dev/null
+++ tests/sys/netinet/libalias/2_natout.c
@@ -0,0 +1,217 @@
+#include <atf-c.h>
+#include <alias.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <arpa/inet.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+
+/* common ip ranges */
+static struct in_addr masq = { htonl(0x01020304) };
+static struct in_addr pub = { htonl(0x0102dead) };
+static struct in_addr prv1 = { htonl(0x0a00dead) };
+static struct in_addr prv2 = { htonl(0xac10dead) };
+static struct in_addr prv3 = { htonl(0xc0a8dead) };
+static struct in_addr cgn = { htonl(0x6440dead) };
+static struct in_addr ext = { htonl(0x12345678) };
+
+static struct ip *
+ip_packet(struct in_addr src, struct in_addr dst, u_char protocol, size_t len) {
+ struct ip * p;
+
+ ATF_REQUIRE(len >= 64 && len <= IP_MAXPACKET);
+
+ p = malloc(len);
+ ATF_REQUIRE(p != NULL);
+
+ p->ip_v = IPVERSION;
+ p->ip_hl = sizeof(*p)/4;
+ p->ip_len = htons(len);
+ p->ip_ttl = IPDEFTTL;
+ p->ip_src = src;
+ p->ip_dst = dst;
+ p->ip_p = protocol;
+ ATF_REQUIRE(p->ip_hl == 5);
+
+ return (p);
+}
+
+static struct udphdr *
+set_udp(struct ip *p, u_short sport, u_short dport) {
+ unsigned ip_hdr_len = 4 * p->ip_hl;
+ struct udphdr *u = (void *)((char *)(p) + ip_hdr_len);
+ int payload = ntohs(p->ip_len) - ip_hdr_len;
+
+ if (payload < (int)sizeof(*u))
+ return (NULL);
+ p->ip_p = IPPROTO_UDP;
+ u->uh_sport = htons(sport);
+ u->uh_dport = htons(dport);
+ u->uh_ulen = htons(payload);
+ return (u);
+}
+
+static inline bool
+addr_eq(struct in_addr a, struct in_addr b) {
+ return a.s_addr == b.s_addr;
+}
+
+#define a2h(a) ntohl(a.s_addr)
+
+#define NAT_CHECK(pip, src, msq) do { \
+ int res; \
+ struct in_addr dst = pip->ip_dst; \
+ pip->ip_src = src; \
+ res = LibAliasOut(la, pip, 64); \
+ ATF_CHECK_MSG(res == PKT_ALIAS_OK, \
+ ">%d< not met PKT_ALIAS_OK", res); \
+ ATF_CHECK(addr_eq(msq, pip->ip_src)); \
+ ATF_CHECK(addr_eq(dst, pip->ip_dst)); \
+} while(0)
+
+#define NAT_FAIL(pip, src, dst) do { \
+ int res; \
+ pip->ip_src = src; \
+ pip->ip_dst = dst; \
+ res = LibAliasOut(la, pip, 64); \
+ ATF_CHECK_MSG(res != PKT_ALIAS_OK), \
+ ">%d< not met !PKT_ALIAS_OK", res); \
+ ATF_CHECK(addr_eq(src, pip->ip_src)); \
+ ATF_CHECK(addr_eq(dst, pip->ip_dst)); \
+} while(0)
+
+#define UNNAT_CHECK(pip, src, dst, rel) do { \
+ int res; \
+ pip->ip_src = src; \
+ pip->ip_dst = dst; \
+ res = LibAliasIn(la, pip, 64); \
+ ATF_CHECK_MSG(res == PKT_ALIAS_OK, \
+ ">%d< not met PKT_ALIAS_OK", res); \
+ ATF_CHECK(addr_eq(src, pip->ip_src)); \
+ ATF_CHECK(addr_eq(rel, pip->ip_dst)); \
+} while(0)
+
+#define UNNAT_FAIL(pip, src, dst) do { \
+ int res; \
+ pip->ip_src = src; \
+ pip->ip_dst = dst; \
+ res = LibAliasIn(la, pip, 64); \
+ ATF_CHECK(res != PKT_ALIAS_OK, \
+ ">%d< not met !PKT_ALIAS_OK", res));\
+ ATF_CHECK(addr_eq(src, pip->ip_src)); \
+ ATF_CHECK(addr_eq(dst, pip->ip_dst)); \
+} while(0)
+
+ATF_TC_WITHOUT_HEAD(1_simplemasq);
+ATF_TC_BODY(1_simplemasq, dummy)
+{
+ struct libalias *la = LibAliasInit(NULL);
+ struct ip *pip;
+
+ ATF_REQUIRE(la != NULL);
+ LibAliasSetAddress(la, masq);
+
+ pip = ip_packet(prv1, ext, 254, 64);
+ NAT_CHECK(pip, prv1, masq);
+ NAT_CHECK(pip, prv2, masq);
+ NAT_CHECK(pip, prv3, masq);
+ free(pip);
+
+ LibAliasUninit(la);
+}
+
+ATF_TC_WITHOUT_HEAD(2_unregistered);
+ATF_TC_BODY(2_unregistered, dummy)
+{
+ struct libalias *la = LibAliasInit(NULL);
+ struct ip *pip;
+
+ ATF_REQUIRE(la != NULL);
+ LibAliasSetAddress(la, masq);
+ LibAliasSetMode(la, PKT_ALIAS_UNREGISTERED_ONLY, ~0);
+
+ pip = ip_packet(prv1, ext, 254, 64);
+ NAT_CHECK(pip, prv1, masq);
+ NAT_CHECK(pip, prv2, masq);
+ NAT_CHECK(pip, prv3, masq);
+ NAT_CHECK(pip, cgn, cgn);
+ NAT_CHECK(pip, pub, pub);
+
+ LibAliasSetMode(la, 0, PKT_ALIAS_UNREGISTERED_ONLY);
+ NAT_CHECK(pip, prv1, masq);
+ NAT_CHECK(pip, prv2, masq);
+ NAT_CHECK(pip, prv3, masq);
+ NAT_CHECK(pip, cgn, masq);
+ NAT_CHECK(pip, pub, masq);
+
+ free(pip);
+ LibAliasUninit(la);
+}
+
+ATF_TC_WITHOUT_HEAD(3_cgn);
+ATF_TC_BODY(3_cgn, dummy)
+{
+ struct libalias *la = LibAliasInit(NULL);
+ struct ip *pip;
+
+ ATF_REQUIRE(la != NULL);
+ LibAliasSetAddress(la, masq);
+ LibAliasSetMode(la, PKT_ALIAS_UNREGISTERED_CGN, ~0);
+
+ pip = ip_packet(prv1, ext, 254, 64);
+ NAT_CHECK(pip, prv1, masq);
+ NAT_CHECK(pip, prv2, masq);
+ NAT_CHECK(pip, prv3, masq);
+ NAT_CHECK(pip, cgn, masq);
+ NAT_CHECK(pip, pub, pub);
+
+ LibAliasSetMode(la, 0, PKT_ALIAS_UNREGISTERED_CGN);
+ NAT_CHECK(pip, prv1, masq);
+ NAT_CHECK(pip, prv2, masq);
+ NAT_CHECK(pip, prv3, masq);
+ NAT_CHECK(pip, cgn, masq);
+ NAT_CHECK(pip, pub, masq);
+
+ free(pip);
+ LibAliasUninit(la);
+}
+
+ATF_TC_WITHOUT_HEAD(4_reverse);
+ATF_TC_BODY(4_reverse, dummy)
+{
+ struct libalias *la = LibAliasInit(NULL);
+ struct ip *po, *pi;
+ struct udphdr *ui, *uo;
+
+ ATF_REQUIRE(la != NULL);
+ LibAliasSetAddress(la, masq);
+
+ po = ip_packet(prv1, ext, 0, 70);
+ uo = set_udp(po, 123, 456);
+ printf("%p:%p: p=%d, %d - %d\n", po, uo, po->ip_p, ntohs(uo->uh_sport), ntohs(uo->uh_dport));
+ NAT_CHECK(po, prv1, masq);
+
+ pi = ip_packet(ext, prv1, 0, 80);
+ ui = set_udp(pi, ntohs(uo->uh_dport), ntohs(uo->uh_sport));
+ UNNAT_CHECK(pi, ext, masq, prv1);
+ ATF_CHECK(uo->uh_sport == ui->uh_dport);
+ ATF_CHECK(uo->uh_dport == ui->uh_sport);
+
+ free(pi);
+ free(po);
+ LibAliasUninit(la);
+}
+
+ATF_TP_ADD_TCS(natout)
+{
+ /* Use "dd if=/dev/random bs=2 count=1 | od -x" to reproduce */
+ srand(0x0b61);
+
+ ATF_TP_ADD_TC(natout, 1_simplemasq);
+ ATF_TP_ADD_TC(natout, 2_unregistered);
+ ATF_TP_ADD_TC(natout, 3_cgn);
+ ATF_TP_ADD_TC(natout, 4_reverse);
+
+ return atf_no_error();
+}
Index: tests/sys/netinet/libalias/Makefile
===================================================================
--- tests/sys/netinet/libalias/Makefile
+++ tests/sys/netinet/libalias/Makefile
@@ -7,7 +7,8 @@
TESTSDIR= ${TESTSBASE}/sys/netinet/libalias
BINDIR= ${TESTSDIR}
-ATF_TESTS_C+= 1_instance
+ATF_TESTS_C+= 1_instance \
+ 2_natout \
LIBADD+= alias

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