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Systemd/src/libsystemd-network/test-icmp6-rs.c
Patrik Flykt 99af546d0e test-icmp6-nd: Add test cases for prefixes 
Add test cases that feeds an Router Advertisement to the ICMPv6 code
and verify that the correct prefix lengths are returned given an IPv6
address.

Enhance the prefix verification test by adding a shorter prefix and
check that the intended prefix lengths are now updated.
2015-01-27 09:35:24 +02:00

358 lines
13 KiB
C
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2014 Intel Corporation. All rights reserved.
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <netinet/icmp6.h>
#include "socket-util.h"
#include "dhcp6-internal.h"
#include "sd-icmp6-nd.h"
static struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
};
static bool verbose = false;
static sd_event_source *test_hangcheck;
static int test_fd[2];
typedef int (*send_ra_t)(uint8_t flags);
static send_ra_t send_ra_function;
static int test_rs_hangcheck(sd_event_source *s, uint64_t usec,
void *userdata) {
assert_se(false);
return 0;
}
int dhcp_network_icmp6_bind_router_solicitation(int index) {
assert_se(index == 42);
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, test_fd) < 0)
return -errno;
return test_fd[0];
}
static int send_ra_short_prefix(uint8_t flags) {
uint8_t advertisement[] = {
0x86, 0x00, 0xbe, 0xd7, 0x40, 0xc0, 0x00, 0xb4,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x34, 0xc0, 0x00, 0x00, 0x01, 0xf4,
0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) ==
sizeof(advertisement));
return 0;
}
static void test_short_prefix_cb(sd_icmp6_nd *nd, int event, void *userdata) {
sd_event *e = userdata;
struct {
struct in6_addr addr;
uint8_t prefixlen;
bool success;
} addrs[] = {
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
52, true },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0x0d, 0xad,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
64, false },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
60, true },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x9d, 0xab, 0xcd,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
64, true },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xed,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } } },
52, true },
};
uint8_t prefixlen;
unsigned int i;
for (i = 0; i < ELEMENTSOF(addrs); i++) {
printf(" %s prefix %02x%02x:%02x%02x:%02x%02x:%02x%02x",
__FUNCTION__,
addrs[i].addr.s6_addr[0], addrs[i].addr.s6_addr[1],
addrs[i].addr.s6_addr[2], addrs[i].addr.s6_addr[3],
addrs[i].addr.s6_addr[4], addrs[i].addr.s6_addr[5],
addrs[i].addr.s6_addr[6], addrs[i].addr.s6_addr[7]);
if (addrs[i].success) {
assert_se(sd_icmp6_ra_get_prefixlen(nd, &addrs[i].addr,
&prefixlen) >= 0);
assert_se(addrs[i].prefixlen == prefixlen);
printf("/%d onlink\n", prefixlen);
} else {
assert_se(sd_icmp6_ra_get_prefixlen(nd, &addrs[i].addr,
&prefixlen) == -EADDRNOTAVAIL);
printf("/128 offlink\n");
}
}
sd_event_exit(e, 0);
}
static int send_ra_prefixes(uint8_t flags) {
uint8_t advertisement[] = {
0x86, 0x00, 0xbe, 0xd7, 0x40, 0xc0, 0x00, 0xb4,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x3f, 0xc0, 0x00, 0x00, 0x01, 0xf4,
0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x40, 0x00, 0x00, 0x00, 0x02, 0x58,
0x00, 0x00, 0x02, 0x1c, 0x00, 0x00, 0x00, 0x00,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0x0d, 0xad,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x3c, 0x80, 0x00, 0x00, 0x03, 0x84,
0x00, 0x00, 0x03, 0x20, 0x00, 0x00, 0x00, 0x00,
0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x03, 0x84,
0x00, 0x00, 0x03, 0x20, 0x00, 0x00, 0x00, 0x00,
0x20, 0x01, 0x0d, 0xb8, 0x00, 0x9d, 0xab, 0xcd,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53
};
assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) ==
sizeof(advertisement));
return 0;
}
static void test_prefixes_cb(sd_icmp6_nd *nd, int event, void *userdata) {
sd_event *e = userdata;
struct {
struct in6_addr addr;
uint8_t prefixlen;
bool success;
} addrs[] = {
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
63, true },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0x0d, 0xad,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
64, false },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0x0b, 0x16, 0xd0, 0x0d,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
60, true },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0x00, 0x9d, 0xab, 0xcd,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } },
64, true },
{ { { { 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xed,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } } },
63, false },
};
uint8_t prefixlen;
unsigned int i;
for (i = 0; i < ELEMENTSOF(addrs); i++) {
printf(" %s prefix %02x%02x:%02x%02x:%02x%02x:%02x%02x",
__FUNCTION__,
addrs[i].addr.s6_addr[0], addrs[i].addr.s6_addr[1],
addrs[i].addr.s6_addr[2], addrs[i].addr.s6_addr[3],
addrs[i].addr.s6_addr[4], addrs[i].addr.s6_addr[5],
addrs[i].addr.s6_addr[6], addrs[i].addr.s6_addr[7]);
if (addrs[i].success) {
assert_se(sd_icmp6_ra_get_prefixlen(nd, &addrs[i].addr,
&prefixlen) >= 0);
assert_se(addrs[i].prefixlen == prefixlen);
printf("/%d onlink\n", prefixlen);
} else {
assert_se(sd_icmp6_ra_get_prefixlen(nd, &addrs[i].addr,
&prefixlen) == -EADDRNOTAVAIL);
printf("/128 offlink\n");
}
}
send_ra_function = send_ra_short_prefix;
assert_se(sd_icmp6_nd_set_callback(nd, test_short_prefix_cb, e) >= 0);
assert_se(sd_icmp6_nd_stop(nd) >= 0);
assert_se(sd_icmp6_router_solicitation_start(nd) >= 0);
}
static void test_prefixes(void) {
sd_event *e;
sd_icmp6_nd *nd;
if (verbose)
printf("* %s\n", __FUNCTION__);
send_ra_function = send_ra_prefixes;
assert_se(sd_event_new(&e) >= 0);
assert_se(sd_icmp6_nd_new(&nd) >= 0);
assert_se(nd);
assert_se(sd_icmp6_nd_attach_event(nd, e, 0) >= 0);
assert_se(sd_icmp6_nd_set_index(nd, 42) >= 0);
assert_se(sd_icmp6_nd_set_mac(nd, &mac_addr) >= 0);
assert_se(sd_icmp6_nd_set_callback(nd, test_prefixes_cb, e) >= 0);
assert_se(sd_icmp6_router_solicitation_start(nd) >= 0);
sd_event_loop(e);
nd = sd_icmp6_nd_unref(nd);
assert_se(!nd);
close(test_fd[1]);
sd_event_unref(e);
}
static int send_ra(uint8_t flags) {
uint8_t advertisement[] = {
0x86, 0x00, 0xde, 0x83, 0x40, 0xc0, 0x00, 0xb4,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x04, 0x40, 0xc0, 0x00, 0x00, 0x01, 0xf4,
0x00, 0x00, 0x01, 0xb8, 0x00, 0x00, 0x00, 0x00,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x19, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x1f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
0x72, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x01, 0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53,
};
advertisement[5] = flags;
assert_se(write(test_fd[1], advertisement, sizeof(advertisement)) ==
sizeof(advertisement));
if (verbose)
printf(" sent RA with flag 0x%02x\n", flags);
return 0;
}
int dhcp_network_icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
return send_ra_function(0);
}
static void test_rs_done(sd_icmp6_nd *nd, int event, void *userdata) {
sd_event *e = userdata;
static int idx = 0;
struct {
uint8_t flag;
int event;
} flag_event[] = {
{ 0, ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE },
{ ND_RA_FLAG_OTHER, ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER },
{ ND_RA_FLAG_MANAGED, ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED }
};
uint32_t mtu;
assert_se(nd);
assert_se(event == flag_event[idx].event);
idx++;
if (verbose)
printf(" got event %d\n", event);
if (idx < 3) {
send_ra(flag_event[idx].flag);
return;
}
assert_se(sd_icmp6_ra_get_mtu(nd, &mtu) == -ENOMSG);
sd_event_exit(e, 0);
}
static void test_rs(void) {
sd_event *e;
sd_icmp6_nd *nd;
usec_t time_now = now(clock_boottime_or_monotonic());
if (verbose)
printf("* %s\n", __FUNCTION__);
send_ra_function = send_ra;
assert_se(sd_event_new(&e) >= 0);
assert_se(sd_icmp6_nd_new(&nd) >= 0);
assert_se(nd);
assert_se(sd_icmp6_nd_attach_event(nd, e, 0) >= 0);
assert_se(sd_icmp6_nd_set_index(nd, 42) >= 0);
assert_se(sd_icmp6_nd_set_mac(nd, &mac_addr) >= 0);
assert_se(sd_icmp6_nd_set_callback(nd, test_rs_done, e) >= 0);
assert_se(sd_event_add_time(e, &test_hangcheck, clock_boottime_or_monotonic(),
time_now + 2 *USEC_PER_SEC, 0,
test_rs_hangcheck, NULL) >= 0);
assert_se(sd_icmp6_nd_stop(nd) >= 0);
assert_se(sd_icmp6_router_solicitation_start(nd) >= 0);
assert_se(sd_icmp6_nd_stop(nd) >= 0);
assert_se(sd_icmp6_router_solicitation_start(nd) >= 0);
sd_event_loop(e);
test_hangcheck = sd_event_source_unref(test_hangcheck);
nd = sd_icmp6_nd_unref(nd);
assert_se(!nd);
close(test_fd[1]);
sd_event_unref(e);
}
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
test_rs();
test_prefixes();
return 0;
}
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