hostap/mac80211_hwsim/tools/hwsim_test.c

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/*
* hwsim_test - Data connectivity test for mac80211_hwsim
* Copyright (c) 2009, Atheros Communications
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
#define HWSIM_ETHERTYPE ETHERTYPE_IP
#define HWSIM_PACKETLEN 1500
static unsigned char addr1[ETH_ALEN], addr2[ETH_ALEN], bcast[ETH_ALEN];
static void tx(int s, const char *ifname, int ifindex,
const unsigned char *src, const unsigned char *dst)
{
char buf[HWSIM_PACKETLEN], *pos;
struct ether_header *eth;
int i;
printf("TX: %s(ifindex=%d) " MACSTR " -> " MACSTR "\n",
ifname, ifindex, MAC2STR(src), MAC2STR(dst));
eth = (struct ether_header *) buf;
memcpy(eth->ether_dhost, dst, ETH_ALEN);
memcpy(eth->ether_shost, src, ETH_ALEN);
eth->ether_type = htons(HWSIM_ETHERTYPE);
pos = (char *) (eth + 1);
for (i = 0; i < sizeof(buf) - sizeof(*eth); i++)
*pos++ = i;
if (send(s, buf, sizeof(buf), 0) < 0)
perror("send");
}
struct rx_result {
int rx_unicast1:1;
int rx_broadcast1:1;
int rx_unicast2:1;
int rx_broadcast2:1;
};
static void rx(int s, int iface, const char *ifname, int ifindex,
struct rx_result *res)
{
char buf[HWSIM_PACKETLEN + 1], *pos;
struct ether_header *eth;
int len, i;
len = recv(s, buf, sizeof(buf), 0);
if (len < 0) {
perror("recv");
return;
}
eth = (struct ether_header *) buf;
printf("RX: %s(ifindex=%d) " MACSTR " -> " MACSTR " (len=%d)\n",
ifname, ifindex,
MAC2STR(eth->ether_shost), MAC2STR(eth->ether_dhost), len);
if (len != HWSIM_PACKETLEN) {
printf("Ignore frame with unexpected RX length\n");
return;
}
pos = (char *) (eth + 1);
for (i = 0; i < sizeof(buf) - 1 - sizeof(*eth); i++) {
if ((unsigned char) *pos != (unsigned char) i) {
printf("Ignore frame with unexpected contents\n");
printf("i=%d received=0x%x expected=0x%x\n",
i, (unsigned char) *pos, (unsigned char) i);
return;
}
pos++;
}
if (iface == 1 &&
memcmp(eth->ether_dhost, addr1, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr2, ETH_ALEN) == 0)
res->rx_unicast1 = 1;
else if (iface == 1 &&
memcmp(eth->ether_dhost, bcast, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr2, ETH_ALEN) == 0)
res->rx_broadcast1 = 1;
else if (iface == 2 &&
memcmp(eth->ether_dhost, addr2, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr1, ETH_ALEN) == 0)
res->rx_unicast2 = 1;
else if (iface == 2 &&
memcmp(eth->ether_dhost, bcast, ETH_ALEN) == 0 &&
memcmp(eth->ether_shost, addr1, ETH_ALEN) == 0)
res->rx_broadcast2 = 1;
}
int main(int argc, char *argv[])
{
int s1 = -1, s2 = -1, ret = -1;
struct ifreq ifr;
int ifindex1, ifindex2;
struct sockaddr_ll ll;
fd_set rfds;
struct timeval tv;
struct rx_result res;
if (argc != 3) {
fprintf(stderr, "usage: hwsim_test <ifname1> <ifname2>\n");
return -1;
}
memset(bcast, 0xff, ETH_ALEN);
s1 = socket(PF_PACKET, SOCK_RAW, htons(HWSIM_ETHERTYPE));
if (s1 < 0) {
perror("socket");
goto fail;
}
s2 = socket(PF_PACKET, SOCK_RAW, htons(HWSIM_ETHERTYPE));
if (s2 < 0) {
perror("socket");
goto fail;
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, argv[1], sizeof(ifr.ifr_name));
if (ioctl(s1, SIOCGIFINDEX, &ifr) < 0) {
perror("ioctl[SIOCGIFINDEX]");
goto fail;
}
ifindex1 = ifr.ifr_ifindex;
if (ioctl(s1, SIOCGIFHWADDR, &ifr) < 0) {
perror("ioctl[SIOCGIFHWADDR]");
goto fail;
}
memcpy(addr1, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, argv[2], sizeof(ifr.ifr_name));
if (ioctl(s2, SIOCGIFINDEX, &ifr) < 0) {
perror("ioctl[SIOCGIFINDEX]");
goto fail;
}
ifindex2 = ifr.ifr_ifindex;
if (ioctl(s2, SIOCGIFHWADDR, &ifr) < 0) {
perror("ioctl[SIOCGIFHWADDR]");
goto fail;
}
memcpy(addr2, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
memset(&ll, 0, sizeof(ll));
ll.sll_family = PF_PACKET;
ll.sll_ifindex = ifindex1;
ll.sll_protocol = htons(HWSIM_ETHERTYPE);
if (bind(s1, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
perror("bind");
goto fail;
}
memset(&ll, 0, sizeof(ll));
ll.sll_family = PF_PACKET;
ll.sll_ifindex = ifindex2;
ll.sll_protocol = htons(HWSIM_ETHERTYPE);
if (bind(s2, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
perror("bind");
goto fail;
}
tx(s1, argv[1], ifindex1, addr1, addr2);
tx(s1, argv[1], ifindex1, addr1, bcast);
tx(s2, argv[2], ifindex2, addr2, addr1);
tx(s2, argv[2], ifindex2, addr2, bcast);
tv.tv_sec = 1;
tv.tv_usec = 0;
memset(&res, 0, sizeof(res));
for (;;) {
int r;
FD_ZERO(&rfds);
FD_SET(s1, &rfds);
FD_SET(s2, &rfds);
r = select(s2 + 1, &rfds, NULL, NULL, &tv);
if (r < 0) {
perror("select");
goto fail;
}
if (r == 0)
break; /* timeout */
if (FD_ISSET(s1, &rfds))
rx(s1, 1, argv[1], ifindex1, &res);
if (FD_ISSET(s2, &rfds))
rx(s2, 2, argv[2], ifindex2, &res);
if (res.rx_unicast1 && res.rx_broadcast1 &&
res.rx_unicast2 && res.rx_broadcast2) {
ret = 0;
break;
}
}
if (ret) {
printf("Did not receive all expected frames:\n"
"rx_unicast1=%d rx_broadcast1=%d "
"rx_unicast2=%d rx_broadcast2=%d\n",
res.rx_unicast1, res.rx_broadcast1,
res.rx_unicast2, res.rx_broadcast2);
} else {
printf("Both unicast and broadcast working in both "
"directions\n");
}
fail:
close(s1);
close(s2);
return ret;
}