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Systemd/src/libsystemd-network/test-ipv4ll.c
Umut Tezduyar Lindskog d9bf4f8c6c libnetworkd: add link local tests 
- Also only allow positive ifindex on both dhcp and ipv4ll

[tomegun: the kernel always sets a positive ifindex, but some APIs accept
          ifindex=0 with various meanings, so we should protect against
          accidentally passing ifindex=0 along.]
2014-04-27 23:39:13 +02:00

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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2014 Axis Communications AB. 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 <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include "util.h"
#include "socket-util.h"
#include "sd-ipv4ll.h"
#include "ipv4ll-internal.h"
static bool verbose = false;
static bool extended = false;
static int test_fd[2];
static int basic_request_handler_bind = 0;
static int basic_request_handler_stop = 0;
static void* basic_request_handler_user_data = (void*)0xCABCAB;
static void basic_request_handler(sd_ipv4ll *ll, int event, void *userdata) {
assert_se(userdata == basic_request_handler_user_data);
switch(event) {
case IPV4LL_EVENT_STOP:
basic_request_handler_stop = 1;
break;
case IPV4LL_EVENT_BIND:
basic_request_handler_bind = 1;
break;
default:
assert_se(0);
break;
}
}
int arp_network_send_raw_socket(int fd, const union sockaddr_union *link,
const struct ether_arp *arp) {
assert_se(arp);
assert_se(link);
assert_se(fd >= 0);
if (send(fd, arp, sizeof(struct ether_arp), 0) < 0)
return -errno;
return 0;
}
int arp_network_bind_raw_socket(int index, union sockaddr_union *link) {
if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK, 0, test_fd) < 0)
return -errno;
return test_fd[0];
}
static void test_arp_header(struct ether_arp *arp) {
assert_se(arp);
assert_se(arp->ea_hdr.ar_hrd == htons(ARPHRD_ETHER)); /* HTYPE */
assert_se(arp->ea_hdr.ar_pro == htons(ETHERTYPE_IP)); /* PTYPE */
assert_se(arp->ea_hdr.ar_hln == ETH_ALEN); /* HLEN */
assert_se(arp->ea_hdr.ar_pln == sizeof arp->arp_spa); /* PLEN */
assert_se(arp->ea_hdr.ar_op == htons(ARPOP_REQUEST)); /* REQUEST */
}
static void test_arp_probe(void) {
struct ether_arp arp;
struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
be32_t pa = 0x3030;
if (verbose)
printf("* %s\n", __FUNCTION__);
arp_packet_probe(&arp, pa, &mac_addr);
test_arp_header(&arp);
assert_se(memcmp(arp.arp_sha, &mac_addr, ETH_ALEN) == 0);
assert_se(memcmp(arp.arp_tpa, &pa, sizeof(pa)) == 0);
}
static void test_arp_announce(void) {
struct ether_arp arp;
struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
be32_t pa = 0x3131;
if (verbose)
printf("* %s\n", __FUNCTION__);
arp_packet_announcement(&arp, pa, &mac_addr);
test_arp_header(&arp);
assert_se(memcmp(arp.arp_sha, &mac_addr, ETH_ALEN) == 0);
assert_se(memcmp(arp.arp_tpa, &pa, sizeof(pa)) == 0);
assert_se(memcmp(arp.arp_spa, &pa, sizeof(pa)) == 0);
}
static void test_public_api_setters(sd_event *e) {
uint8_t seed[8];
sd_ipv4ll *ll;
struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
if (verbose)
printf("* %s\n", __FUNCTION__);
assert_se(sd_ipv4ll_new(&ll) == 0);
assert_se(ll);
assert_se(sd_ipv4ll_attach_event(NULL, NULL, 0) == -EINVAL);
assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
assert_se(sd_ipv4ll_attach_event(ll, e, 0) == -EBUSY);
assert_se(sd_ipv4ll_set_callback(NULL, NULL, NULL) == -EINVAL);
assert_se(sd_ipv4ll_set_callback(ll, NULL, NULL) == 0);
assert_se(sd_ipv4ll_set_address_seed(NULL, NULL) == -EINVAL);
assert_se(sd_ipv4ll_set_address_seed(ll, NULL) == -EINVAL);
assert_se(sd_ipv4ll_set_address_seed(ll, seed) == 0);
assert_se(sd_ipv4ll_set_mac(NULL, NULL) == -EINVAL);
assert_se(sd_ipv4ll_set_mac(ll, NULL) == -EINVAL);
assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
assert_se(sd_ipv4ll_set_index(NULL, -1) == -EINVAL);
assert_se(sd_ipv4ll_set_index(ll, -1) == -EINVAL);
assert_se(sd_ipv4ll_set_index(ll, -99) == -EINVAL);
assert_se(sd_ipv4ll_set_index(ll, 1) == 0);
assert_se(sd_ipv4ll_set_index(ll, 99) == 0);
assert_se(sd_ipv4ll_ref(ll) == ll);
assert_se(sd_ipv4ll_unref(ll) == ll);
/* Cleanup */
assert_se(sd_ipv4ll_unref(ll) == NULL);
}
static void test_basic_request(sd_event *e) {
sd_ipv4ll *ll;
struct ether_arp arp;
struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}};
if (verbose)
printf("* %s\n", __FUNCTION__);
assert_se(sd_ipv4ll_new(&ll) == 0);
assert_se(sd_ipv4ll_start(ll) == -EINVAL);
assert_se(sd_ipv4ll_attach_event(ll, e, 0) == 0);
assert_se(sd_ipv4ll_start(ll) == -EINVAL);
assert_se(sd_ipv4ll_set_mac(ll, &mac_addr) == 0);
assert_se(sd_ipv4ll_start(ll) == -EINVAL);
assert_se(sd_ipv4ll_set_callback(ll, basic_request_handler,
basic_request_handler_user_data) == 0);
assert_se(sd_ipv4ll_start(ll) == -EINVAL);
assert_se(sd_ipv4ll_set_index(ll, 1) == 0);
assert_se(sd_ipv4ll_start(ll) == 0);
sd_event_run(e, (uint64_t) -1);
assert_se(sd_ipv4ll_start(ll) == -EBUSY);
/* PROBE */
sd_event_run(e, (uint64_t) -1);
assert_se(read(test_fd[1], &arp, sizeof(struct ether_arp)) == sizeof(struct ether_arp));
test_arp_header(&arp);
if (extended) {
/* PROBE */
sd_event_run(e, (uint64_t) -1);
assert_se(read(test_fd[1], &arp, sizeof(struct ether_arp)) == sizeof(struct ether_arp));
test_arp_header(&arp);
/* PROBE */
sd_event_run(e, (uint64_t) -1);
assert_se(read(test_fd[1], &arp, sizeof(struct ether_arp)) == sizeof(struct ether_arp));
test_arp_header(&arp);
sd_event_run(e, (uint64_t) -1);
assert_se(basic_request_handler_bind == 1);
}
sd_ipv4ll_stop(ll);
assert_se(basic_request_handler_stop == 1);
/* Cleanup */
assert_se(sd_ipv4ll_unref(ll) == NULL);
safe_close(test_fd[1]);
}
int main(int argc, char *argv[]) {
sd_event *e;
assert_se(sd_event_new(&e) >= 0);
test_public_api_setters(e);
test_arp_probe();
test_arp_announce();
test_basic_request(e);
return 0;
}
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