void icmpIpIn(icmpip_hdr* packet)
{
// check ICMP type
switch(packet->icmp.type)
{
case ICMP_TYPE_ECHOREQUEST:
// echo request
icmpEchoRequest(packet);
break;
default:
break;
}
}
/**
* @ingroup shell
*
* Shell command (ping).
* @param nargs number of arguments in args array
* @param args array of arguments
* @return OK for success, SYSERR for syntax error
*/
shellcmd xsh_ping(int nargs, char *args[])
{
int i = 0;
int interval = 1000, count = 10, recv = 0, echoq = 0;
ulong rtt = 0, min = 0, max = 0, total = 0;
ulong startsec = 0, startms = 0;
struct netaddr target;
struct packet *pkt = NULL;
char str[50];
/* Output help, if '--help' argument was supplied */
if (nargs == 2 && strncmp(args[1], "--help", 7) == 0)
{
printf("Usage: ping <IP>\n\n");
printf("Description:\n");
printf("\tSend ICMP echo requests to network hosts\n");
printf("Options:\n");
printf("\t<IP>\t\tIP address\n");
printf("\t-c count\tstop after sending count packets\n");
printf
("\t-i interval\tsleep interval milliseconds between pings\n");
printf("\t--help\t\tdisplay this help and exit\n");
return OK;
}
/* Check for correct number of arguments */
if (nargs < 2)
{
fprintf(stderr, "ping: too few arguments\n");
fprintf(stderr, "Try 'ping --help' for more information\n");
return SHELL_ERROR;
}
i = 1;
while (i < nargs)
{
if (0 == strncmp(args[i], "-c", 3))
{
i++;
if (i < nargs)
{
count = atoi(args[i]);
}
else
{
fprintf(stderr, "ping: -c requires integer argument\n");
return SHELL_ERROR;
}
}
else if (0 == strncmp(args[i], "-i", 3))
{
i++;
if (i < nargs)
{
interval = atoi(args[i]);
}
else
{
fprintf(stderr, "ping: -i requires integer argument\n");
return SHELL_ERROR;
}
}
else if (SYSERR == dot2ipv4(args[i], &target))
{
fprintf(stderr, "ping: %s is not a valid IPv4 address.\n",
args[i]);
return SHELL_ERROR;
}
i++;
}
netaddrsprintf(str, &target);
if (0 == strncmp(str, "ERROR", 6))
{
fprintf(stderr, "ping: destination IP address required.\n");
return SHELL_ERROR;
}
printf("PING %s\n", str);
echoq = echoQueueAlloc();
if (SYSERR == echoq)
{
printf("...No free echo queues!\n");
return SHELL_ERROR;
}
startsec = clktime;
startms = clkticks;
for (i = 0; i < count; i++)
{
// Send ping packet
if (SYSERR == icmpEchoRequest(&target, gettid(), i))
{
printf("...Failed to reach %s\n", str);
return SHELL_ERROR;
}
sleep(interval);
if (NOMSG != recvclr())
{
// pick reply packets off of the queue
pkt = echoQueueGet(echoq);
while ((NULL != (ulong)pkt) && (SYSERR != (ulong)pkt))
{
rtt = echoTripTime(pkt);
total += rtt;
if ((rtt < min) || (0 == min))
{
min = rtt;
}
if (rtt > max)
{
max = rtt;
}
echoPrintPkt(pkt, rtt);
netFreebuf(pkt);
recv++;
pkt = echoQueueGet(echoq);
}
}
}
echoQueueDealloc(echoq);
netaddrsprintf(str, &target);
printf("--- %s ping statistics ---\n", str);
printf("%d packets transmitted, %d received,", count, recv);
printf(" %d%% packet loss,", (count - recv) * 100 / count);
printf(" time %dms\n", (clktime - startsec) * 1000 +
((clkticks - startms) * 1000) / CLKTICKS_PER_SEC);
printf("rtt min/avg/max = %d.%03d/", min / 1000, min % 1000);
if (0 != recv)
{
printf("%d.%03d/", (total / recv) / 1000, (total / recv) % 1000);
}
else
{
printf("-/");
}
printf("%d.%03d ms\n", max / 1000, max % 1000);
return SHELL_OK;
}
