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hwsim_test: Use a valid IPv4 header in the test frame

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Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-12-24 14:18:14 +02:00
parent eaca46532f
commit 991e31cd66
1 changed files with 36 additions and 5 deletions
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41
mac80211_hwsim/tools/hwsim_test.c
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@ -17,6 +17,7 @@
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <netinet/ip.h>
#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
@ -26,11 +27,28 @@
static unsigned char addr1[ETH_ALEN], addr2[ETH_ALEN], bcast[ETH_ALEN];
static u_int16_t checksum(const void *buf, size_t len)
{
size_t i;
u_int32_t sum = 0;
const u_int16_t *pos = buf;
for (i = 0; i < len / 2; i++)
sum += *pos++;
while (sum >> 16)
sum = (sum & 0xffff) + (sum >> 16);
return sum ^ 0xffff;
}
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;
struct iphdr *ip;
int i;
printf("TX: %s(ifindex=%d) " MACSTR " -> " MACSTR "\n",
@ -40,8 +58,19 @@ static void tx(int s, const char *ifname, int ifindex,
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++)
ip = (struct iphdr *) (eth + 1);
memset(ip, 0, sizeof(*ip));
ip->ihl = 5;
ip->version = 4;
ip->ttl = 64;
ip->tos = 0;
ip->tot_len = htons(HWSIM_PACKETLEN - sizeof(*eth));
ip->protocol = 1;
ip->saddr = htonl(192 << 24 | 168 << 16 | 1 << 8 | 1);
ip->daddr = htonl(192 << 24 | 168 << 16 | 1 << 8 | 2);
ip->check = checksum(ip, sizeof(*ip));
pos = (char *) (ip + 1);
for (i = 0; i < sizeof(buf) - sizeof(*eth) - sizeof(*ip); i++)
*pos++ = i;
if (send(s, buf, sizeof(buf), 0) < 0)
@ -62,6 +91,7 @@ static void rx(int s, int iface, const char *ifname, int ifindex,
{
char buf[HWSIM_PACKETLEN + 1], *pos;
struct ether_header *eth;
struct iphdr *ip;
int len, i;
len = recv(s, buf, sizeof(buf), 0);
@ -76,12 +106,13 @@ static void rx(int s, int iface, const char *ifname, int ifindex,
MAC2STR(eth->ether_shost), MAC2STR(eth->ether_dhost), len);
if (len != HWSIM_PACKETLEN) {
printf("Ignore frame with unexpected RX length\n");
printf("Ignore frame with unexpected RX length (%d)\n", len);
return;
}
pos = (char *) (eth + 1);
for (i = 0; i < sizeof(buf) - 1 - sizeof(*eth); i++) {
ip = (struct iphdr *) (eth + 1);
pos = (char *) (ip + 1);
for (i = 0; i < sizeof(buf) - 1 - sizeof(*eth) - sizeof(*ip); 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",