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tests/sys/netgraph/bridge.c

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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright 2021 Lutz Donnerhacke
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <atf-c.h>
#include <errno.h>
#include <stdio.h>
#include <net/ethernet.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include "util.h"
#include <netgraph/ng_bridge.h>
static void get_data0(void *data, size_t len, void *ctx);
static void get_data1(void *data, size_t len, void *ctx);
static void get_data2(void *data, size_t len, void *ctx);
static void get_data3(void *data, size_t len, void *ctx);
static void get_tablesize(char const *source, struct ng_mesg *msg, void *ctx);
struct gettable {
u_int32_t tok;
int cnt;
};
struct frame4 {
struct ether_header eh;
struct ip ip;
char data[64];
};
struct frame6 {
struct ether_header eh;
struct ip6_hdr ip;
char data[64];
};
static struct frame4 msg4 = {
.ip.ip_v = 4,
.ip.ip_hl = 5,
.ip.ip_ttl = 1,
.ip.ip_p = 254,
.ip.ip_src = { htonl(0x0a00dead) },
.ip.ip_dst = { htonl(0x0a00beef) },
.ip.ip_len = 32,
.eh.ether_type = ETHERTYPE_IP,
.eh.ether_shost = { 2,4,6 },
.eh.ether_dhost = { 2,4,6 },
};
ATF_TC(basic);
ATF_TC_HEAD(basic, conf)
{
atf_tc_set_md_var(conf, "require.user", "root");
}
ATF_TC_BODY(basic, dummy)
{
int r[4];
struct gettable rm;
ng_init();
ng_errors(PASS);
ng_shutdown("bridge:");
ng_errors(FAIL);
ng_mkpeer(".", "a", "bridge", "link0");
ng_name("a", "bridge");
ng_connect(".", "b", "bridge:", "link1");
ng_connect(".", "c", "bridge:", "link2");
/* do not bounce back */
ng_register_data("a", get_data0);
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
ng_send_data("a", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0);
/* send to others */
ng_register_data("b", get_data1);
ng_register_data("c", get_data2);
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
ng_send_data("a", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1);
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 2;
ng_send_data("b", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 1);
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 3;
ng_send_data("c", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 1 && r[2] == 0);
/* send to learned unicast */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
msg4.eh.ether_dhost[5] = 3;
ng_send_data("a", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 0 && r[2] == 1);
/* inspect mac table */
ng_register_msg(get_tablesize);
rm.tok = ng_send_msg("bridge:", "gettable");
rm.cnt = 0;
ng_handle_events(50, &rm);
ATF_CHECK(rm.cnt == 3);
/* remove a link */
ng_rmhook(".", "b");
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
msg4.eh.ether_dhost[5] = 0;
ng_send_data("a", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 0 && r[2] == 1);
/* inspect mac table */
ng_register_msg(get_tablesize);
rm.tok = ng_send_msg("bridge:", "gettable");
rm.cnt = 0;
ng_handle_events(50, &rm);
ATF_CHECK(rm.cnt == 2);
ng_shutdown("bridge:");
}
ATF_TC(persistence);
ATF_TC_HEAD(persistence, conf)
{
atf_tc_set_md_var(conf, "require.user", "root");
}
ATF_TC_BODY(persistence, dummy)
{
ng_init();
ng_errors(PASS);
ng_shutdown("bridge:");
ng_errors(FAIL);
ng_mkpeer(".", "a", "bridge", "link0");
ng_name("a", "bridge");
ng_send_msg("bridge:", "setpersistent");
ng_rmhook(".", "a");
ng_shutdown("bridge:");
}
ATF_TC(loop);
ATF_TC_HEAD(loop, conf)
{
atf_tc_set_md_var(conf, "require.user", "root");
}
ATF_TC_BODY(loop, dummy)
{
int r[4], i;
ng_init();
ng_errors(PASS);
ng_shutdown("bridge1:");
ng_shutdown("bridge2:");
ng_errors(FAIL);
ng_mkpeer(".", "a", "bridge", "link0");
ng_name("a", "bridge1");
ng_mkpeer(".", "b", "bridge", "link1");
ng_name("b", "bridge2");
ng_register_data("a", get_data0);
ng_register_data("b", get_data1);
/*
* Open loop
*
* /-- bridge1
* . < |
* \-- bridge2
*/
ng_connect("bridge1:", "link11", "bridge2:", "link11");
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
ng_send_data("a", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1);
/*
* Closed loop, DANGEROUS!
*
* /-- bridge1 -\
* . < | |
* \-- bridge2 -/
*/
ng_connect("bridge1:", "link12", "bridge2:", "link12");
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
ng_errors(PASS);
ng_send_data("a", &msg4, sizeof(msg4));
ATF_CHECK_ERRNO(ELOOP, errno != 0); /* loop might be detected */
ng_errors(FAIL);
for(i = 0; i < 10; i++) /* don't run forever */
if (!ng_handle_event(50, &r))
break;
ATF_CHECK(r[0] == 0 && r[1] == 1);
ng_shutdown("bridge1:");
ng_shutdown("bridge2:");
}
ATF_TC(many_unicasts);
ATF_TC_HEAD(many_unicasts, conf)
{
atf_tc_set_md_var(conf, "require.user", "root");
}
ATF_TC_BODY(many_unicasts, dummy)
{
int r[4], i;
const int HOOKS = 1000;
struct gettable rm;
ng_init();
ng_errors(PASS);
ng_shutdown("bridge:");
ng_errors(FAIL);
ng_mkpeer(".", "a", "bridge", "link0");
ng_name("a", "bridge");
ng_register_data("a", get_data0);
/* learn MAC */
bzero(r, sizeof(r));
msg4.eh.ether_shost[3] = 0xff;
ng_send_data("a", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0);
/* use learned MAC as destination */
msg4.eh.ether_shost[3] = 0;
msg4.eh.ether_dhost[3] = 0xff;
/* now send */
bzero(r, sizeof(r));
for (i = 1; i <= HOOKS; i++) {
char hook[20];
snprintf(hook, sizeof(hook), "link%d", i);
ng_connect(".", hook, "bridge:", hook);
ng_register_data(hook, get_data2);
msg4.eh.ether_shost[4] = i >> 8;
msg4.eh.ether_shost[5] = i & 0xff;
ng_errors(PASS);
ng_send_data(hook, &msg4, sizeof(msg4));
ng_errors(FAIL);
if (errno != 0)
break;
ng_handle_events(50, &r);
}
ATF_CHECK(r[0] == HOOKS && r[2] == 0);
/* inspect mac table */
ng_register_msg(get_tablesize);
rm.cnt = 0;
ng_errors(PASS);
rm.tok = ng_send_msg("bridge:", "gettable");
ng_errors(FAIL);
if (rm.tok == (u_int32_t)-1) {
ATF_CHECK_ERRNO(ENOBUFS, 1);
atf_tc_expect_fail("response too large");
}
ng_handle_events(50, &rm);
ATF_CHECK(rm.cnt == HOOKS+1);
atf_tc_expect_pass();
ng_shutdown("bridge:");
}
ATF_TC(many_broadcasts);
ATF_TC_HEAD(many_broadcasts, conf)
{
atf_tc_set_md_var(conf, "require.user", "root");
}
ATF_TC_BODY(many_broadcasts, dummy)
{
int r[4], i;
const int HOOKS = 1000;
ng_init();
ng_errors(PASS);
ng_shutdown("bridge:");
ng_errors(FAIL);
ng_mkpeer(".", "a", "bridge", "link0");
ng_name("a", "bridge");
ng_register_data("a", get_data0);
/* learn MAC */
bzero(r, sizeof(r));
msg4.eh.ether_shost[3] = 0xff;
ng_send_data("a", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0);
/* use broadcast MAC */
msg4.eh.ether_shost[3] = 0;
memset(msg4.eh.ether_dhost, 0xff, sizeof(msg4.eh.ether_dhost));
/* now send */
bzero(r, sizeof(r));
for (i = 1; i <= HOOKS; i++) {
char hook[20];
snprintf(hook, sizeof(hook), "link%d", i);
ng_connect(".", hook, "bridge:", hook);
ng_register_data(hook, get_data3);
msg4.eh.ether_shost[4] = i >> 8;
msg4.eh.ether_shost[5] = i & 0xff;
ng_errors(PASS);
ng_send_data(hook, &msg4, sizeof(msg4));
ng_errors(FAIL);
if (errno != 0)
break;
ng_handle_events(50, &r);
}
ATF_CHECK(r[0] > 100 && r[3] > 100);
if (i < HOOKS)
atf_tc_expect_fail("netgraph queue full (%d)", i);
ATF_CHECK(r[0] == HOOKS);
atf_tc_expect_pass();
ng_shutdown("bridge:");
}
ATF_TC(uplink_private);
ATF_TC_HEAD(uplink_private, conf)
{
atf_tc_set_md_var(conf, "require.user", "root");
}
ATF_TC_BODY(uplink_private, dummy)
{
int r[4];
struct gettable rm;
ng_init();
ng_errors(PASS);
ng_shutdown("bridge:");
ng_mkpeer(".", "u1", "bridge", "uplink1");
if(errno > 0)
atf_tc_skip("uplinks are not supported.");
ng_errors(FAIL);
ng_name("u1", "bridge");
ng_register_data("u1", get_data1);
ng_connect(".", "u2", "bridge:", "uplink2");
ng_register_data("u2", get_data2);
ng_connect(".", "l0", "bridge:", "link0");
ng_register_data("l0", get_data0);
ng_connect(".", "l3", "bridge:", "link3");
ng_register_data("l3", get_data3);
/* unknown unicast 0 from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 0 && r[2] == 1 && r[3] == 0);
/* unknown unicast 2 from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
msg4.eh.ether_dhost[5] = 2;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 0);
/* known unicast 0 from uplink2 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 2;
msg4.eh.ether_dhost[5] = 0;
ng_send_data("u2", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 0 && r[3] == 0);
/* known unicast 0 from link3 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 3;
msg4.eh.ether_dhost[5] = 0;
ng_send_data("l3", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 0 && r[3] == 0);
/* (un)known unicast 2 from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
msg4.eh.ether_dhost[5] = 2;
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 0 && r[2] == 1 && r[3] == 0);
/* (un)known unicast 2 from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 0);
/* unknown multicast 2 from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
msg4.eh.ether_dhost[0] = 0xff;
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 1 && r[3] == 1);
/* unknown multicast 2 from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 1);
/* broadcast from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
memset(msg4.eh.ether_dhost, 0xff, sizeof(msg4.eh.ether_dhost));
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 1 && r[3] == 1);
/* broadcast from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 1);
/* inspect mac table */
ng_register_msg(get_tablesize);
rm.tok = ng_send_msg("bridge:", "gettable");
rm.cnt = 0;
ng_handle_events(50, &rm);
ATF_CHECK(rm.cnt == 2);
ng_shutdown("bridge:");
}
ATF_TC(uplink_classic);
ATF_TC_HEAD(uplink_classic, conf)
{
atf_tc_set_md_var(conf, "require.user", "root");
}
ATF_TC_BODY(uplink_classic, dummy)
{
int r[4];
struct gettable rm;
ng_init();
ng_errors(PASS);
ng_shutdown("bridge:");
ng_mkpeer(".", "l0", "bridge", "link0");
if(errno > 0)
atf_tc_skip("uplinks are not supported.");
ng_errors(FAIL);
ng_name("l0", "bridge");
ng_register_data("l0", get_data0);
ng_connect(".", "u1", "bridge:", "uplink1");
ng_register_data("u1", get_data1);
ng_connect(".", "u2", "bridge:", "uplink2");
ng_register_data("u2", get_data2);
ng_connect(".", "l3", "bridge:", "link3");
ng_register_data("l3", get_data3);
/* unknown unicast 0 from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 1 && r[3] == 1);
/* unknown unicast 2 from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
msg4.eh.ether_dhost[5] = 2;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 1);
/* known unicast 0 from uplink2 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 2;
msg4.eh.ether_dhost[5] = 0;
ng_send_data("u2", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 0 && r[3] == 0);
/* known unicast 0 from link3 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 3;
msg4.eh.ether_dhost[5] = 0;
ng_send_data("l3", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 0 && r[3] == 0);
/* (un)known unicast 2 from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
msg4.eh.ether_dhost[5] = 2;
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 1 && r[3] == 1);
/* (un)known unicast 2 from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 1);
/* unknown multicast 2 from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
msg4.eh.ether_dhost[0] = 0xff;
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 1 && r[3] == 1);
/* unknown multicast 2 from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 1);
/* broadcast from uplink1 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 1;
memset(msg4.eh.ether_dhost, 0xff, sizeof(msg4.eh.ether_dhost));
ng_send_data("u1", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 1 && r[1] == 0 && r[2] == 1 && r[3] == 1);
/* broadcast from link0 */
bzero(r, sizeof(r));
msg4.eh.ether_shost[5] = 0;
ng_send_data("l0", &msg4, sizeof(msg4));
ng_handle_events(50, &r);
ATF_CHECK(r[0] == 0 && r[1] == 1 && r[2] == 1 && r[3] == 1);
/* inspect mac table */
ng_register_msg(get_tablesize);
rm.tok = ng_send_msg("bridge:", "gettable");
rm.cnt = 0;
ng_handle_events(50, &rm);
ATF_CHECK(rm.cnt == 2);
ng_shutdown("bridge:");
}
ATF_TP_ADD_TCS(bridge)
{
ATF_TP_ADD_TC(bridge, basic);
ATF_TP_ADD_TC(bridge, loop);
ATF_TP_ADD_TC(bridge, persistence);
ATF_TP_ADD_TC(bridge, many_unicasts);
ATF_TP_ADD_TC(bridge, many_broadcasts);
ATF_TP_ADD_TC(bridge, uplink_private);
ATF_TP_ADD_TC(bridge, uplink_classic);
return atf_no_error();
}
static inline void
_get_data(void *data, size_t len, void *ctx, int i)
{
int *cnt = ctx;
(void)data;
fprintf(stderr, "[%d] Got %zu bytes of data.\n", i, len);
cnt[i]++;
}
#define GD(x) static void \
get_data##x(void *data, size_t len, void *ctx) {\
_get_data(data, len, ctx, x); \
}
GD(0)
GD(1)
GD(2)
GD(3)
static void
get_tablesize(char const *source, struct ng_mesg *msg, void *ctx)
{
struct gettable *rm = ctx;
struct ng_bridge_host_ary *gt = (void *)msg->data;
fprintf(stderr, "Response from %s to query %d\n", source, msg->header.token);
if (rm->tok == msg->header.token)
rm->cnt = gt->numHosts;
}