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#pragma once
/*
* Test Helpers
* Bunch of helpers to setup the environment for networking tests. This
* includes net-namespace setups, veth setups, and more.
*/
#include <assert.h>
#include <endian.h>
#include <errno.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <poll.h>
#include <sched.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "n-acd.h"
static inline void test_if_query(const char *name, int *indexp, struct ether_addr *macp) {
struct ifreq ifr = {};
size_t l;
int r, s;
l = strlen(name);
assert(l <= IF_NAMESIZE);
if (indexp) {
*indexp = if_nametoindex(name);
assert(*indexp > 0);
}
if (macp) {
s = socket(AF_INET, SOCK_DGRAM, 0);
assert(s >= 0);
strncpy(ifr.ifr_name, name, l);
r = ioctl(s, SIOCGIFHWADDR, &ifr);
assert(r >= 0);
memcpy(macp->ether_addr_octet, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
close(s);
}
}
static inline void test_veth_cmd(int ifindex, const char *cmd) {
char *p, name[IF_NAMESIZE + 1] = {};
int r;
p = if_indextoname(ifindex, name);
assert(p);
r = asprintf(&p, "ip link set %s %s", name, cmd);
assert(r >= 0);
/* Again: Ewwww... */
r = system(p);
assert(r == 0);
free(p);
}
static inline void test_veth_new(int *parent_indexp,
struct ether_addr *parent_macp,
int *child_indexp,
struct ether_addr *child_macp) {
int r;
/* Eww... but it works. */
r = system("ip link add type veth");
assert(r == 0);
r = system("ip link set veth0 up");
assert(r == 0);
r = system("ip link set veth1 up");
assert(r == 0);
test_if_query("veth0", parent_indexp, parent_macp);
test_if_query("veth1", child_indexp, child_macp);
}
static inline int test_setup(void) {
int r;
r = unshare(CLONE_NEWNET);
if (r < 0) {
assert(errno == EPERM);
return 77;
}
return 0;
}
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