test-ndisc-rs.c revision 4d7b83da7b78647f4ba3f1d6fa2dc8d7b9833d93
/*-*- 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-ndisc.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_ndisc *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_ndisc_get_prefixlen(nd, &addrs[i].addr,
&prefixlen) >= 0);
assert_se(addrs[i].prefixlen == prefixlen);
printf("/%d onlink\n", prefixlen);
} else {
assert_se(sd_ndisc_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_ndisc *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_ndisc_get_prefixlen(nd, &addrs[i].addr,
&prefixlen) >= 0);
assert_se(addrs[i].prefixlen == prefixlen);
printf("/%d onlink\n", prefixlen);
} else {
assert_se(sd_ndisc_get_prefixlen(nd, &addrs[i].addr,
&prefixlen) == -EADDRNOTAVAIL);
printf("/128 offlink\n");
}
}
send_ra_function = send_ra_short_prefix;
assert_se(sd_ndisc_set_callback(nd, test_short_prefix_cb, e) >= 0);
assert_se(sd_ndisc_stop(nd) >= 0);
assert_se(sd_ndisc_router_discovery_start(nd) >= 0);
}
static void test_prefixes(void) {
sd_event *e;
sd_ndisc *nd;
if (verbose)
printf("* %s\n", __FUNCTION__);
send_ra_function = send_ra_prefixes;
assert_se(sd_event_new(&e) >= 0);
assert_se(sd_ndisc_new(&nd) >= 0);
assert_se(nd);
assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
assert_se(sd_ndisc_set_index(nd, 42) >= 0);
assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
assert_se(sd_ndisc_set_callback(nd, test_prefixes_cb, e) >= 0);
assert_se(sd_ndisc_router_discovery_start(nd) >= 0);
sd_event_loop(e);
nd = sd_ndisc_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_ndisc *nd, int event, void *userdata) {
sd_event *e = userdata;
static int idx = 0;
struct {
uint8_t flag;
int event;
} flag_event[] = {
{ 0, SD_NDISC_EVENT_ROUTER_ADVERTISMENT_NONE },
{ ND_RA_FLAG_OTHER, SD_NDISC_EVENT_ROUTER_ADVERTISMENT_OTHER },
{ ND_RA_FLAG_MANAGED, SD_NDISC_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_ndisc_get_mtu(nd, &mtu) == -ENOMSG);
sd_event_exit(e, 0);
}
static void test_rs(void) {
sd_event *e;
sd_ndisc *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_ndisc_new(&nd) >= 0);
assert_se(nd);
assert_se(sd_ndisc_attach_event(nd, e, 0) >= 0);
assert_se(sd_ndisc_set_index(nd, 42) >= 0);
assert_se(sd_ndisc_set_mac(nd, &mac_addr) >= 0);
assert_se(sd_ndisc_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_ndisc_stop(nd) >= 0);
assert_se(sd_ndisc_router_discovery_start(nd) >= 0);
assert_se(sd_ndisc_stop(nd) >= 0);
assert_se(sd_ndisc_router_discovery_start(nd) >= 0);
sd_event_loop(e);
test_hangcheck = sd_event_source_unref(test_hangcheck);
nd = sd_ndisc_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;
}