static int
lookupHost(ping_target *target)
{
-
struct hostent *hent;
+ struct sockaddr_in *iaddr;
- /* Local Variables */
+ int iip[4];
+ char c;
- struct sockaddr_in *iaddr;
+ iaddr = (struct sockaddr_in *) &(target->address);
+ iaddr->sin_family = AF_INET;
- /* Set up the target address we first assume that the name is the
- IP address as a string */
+ if (4 == sscanf(target->name, "%d.%d.%d.%d%c",
+ &iip[0], &iip[1], &iip[2], &iip[3], &c))
+ {
+ /* It's an IP address.
+ */
+ unsigned char ip[4];
- iaddr = (struct sockaddr_in *) &(target->address);
- iaddr->sin_family = AF_INET;
- if ((iaddr->sin_addr.s_addr = inet_addr(target->name)) >= 0) {
- char ip[4];
- ip[3] = iaddr->sin_addr.s_addr >> 24 & 255;
- ip[2] = iaddr->sin_addr.s_addr >> 16 & 255;
- ip[1] = iaddr->sin_addr.s_addr >> 8 & 255;
- ip[0] = iaddr->sin_addr.s_addr & 255;
+ ip[0] = iip[0];
+ ip[1] = iip[1];
+ ip[2] = iip[2];
+ ip[3] = iip[3];
+
+ if (ip[3] == 0)
+ {
+ if (debug_p > 1)
+ fprintf (stderr, "%s: ignoring bogus IP %s\n",
+ progname, target->name);
+ return 0;
+ }
+
+ iaddr->sin_addr.s_addr = ((ip[3] << 24) |
+ (ip[2] << 16) |
+ (ip[1] << 8) |
+ (ip[0]));
hent = gethostbyaddr (ip, 4, AF_INET);
- if (hent && hent->h_name && *hent->h_name) {
+
+ if (debug_p > 1)
+ fprintf (stderr, "%s: %s => %s\n",
+ progname, target->name,
+ ((hent && hent->h_name && *hent->h_name)
+ ? hent->h_name : "<unknown>"));
+
+ if (hent && hent->h_name && *hent->h_name)
target->name = strdup (hent->h_name);
- return 1;
- }
}
+ else
+ {
+ /* It's a host name.
+ */
+ hent = gethostbyname (target->name);
+ if (!hent)
+ {
+ fprintf (stderr, "%s: could not resolve host: %s\n",
+ progname, target->name);
+ return 0;
+ }
- /* Conversion of IP address failed, try to look the host up by name */
+ memcpy (&iaddr->sin_addr, hent->h_addr_list[0],
+ sizeof(iaddr->sin_addr));
- hent = gethostbyname(target->name);
- if (hent == NULL) {
- fprintf(stderr, "%s: could not resolve host %s\n",
- progname, target->name);
- return 0;
+ if (debug_p > 1)
+ fprintf (stderr, "%s: %s => %d.%d.%d.%d\n",
+ progname, target->name,
+ iaddr->sin_addr.s_addr & 255,
+ iaddr->sin_addr.s_addr >> 8 & 255,
+ iaddr->sin_addr.s_addr >> 16 & 255,
+ iaddr->sin_addr.s_addr >> 24 & 255);
}
- memcpy(&iaddr->sin_addr, hent->h_addr_list[0],
- sizeof(iaddr->sin_addr));
+ return 1;
+}
- /* Done */
- return 1;
+static void
+print_host (FILE *out, unsigned long ip, const char *name)
+{
+ char ips[50];
+ sprintf (ips, "%d.%d.%d.%d",
+ (ip) & 255,
+ (ip >> 8) & 255,
+ (ip >> 16) & 255,
+ (ip >> 24) & 255);
+ if (!name || !*name) name = "<unknown>";
+ fprintf (out, "%-16s %s\n", ips, name);
}
+
/*
* Create a target for a host.
*
if (! lookupHost(target))
goto target_init_error;
+ /* Don't ever use loopback (127.0.0) hosts */
+ {
+ struct sockaddr_in *iaddr = (struct sockaddr_in *) &(target->address);
+ unsigned long ip = iaddr->sin_addr.s_addr;
+ if ((ip & 255) == 127 &&
+ ((ip >> 8) & 255) == 0 &&
+ ((ip >> 16) & 255) == 0)
+ {
+ if (debug_p)
+ fprintf (stderr, "%s: ignoring loopback host %s\n",
+ progname, target->name);
+ goto target_init_error;
+ }
+ }
+
/* Done */
if (debug_p)
{
struct sockaddr_in *iaddr = (struct sockaddr_in *) &(target->address);
unsigned long ip = iaddr->sin_addr.s_addr;
- fprintf (stderr, "%s: added host %d.%d.%d.%d (%s)\n", progname,
- ip & 255, ip >> 8 & 255, ip >> 16 & 255, ip >> 24 & 255,
- target->name);
+ fprintf (stderr, "%s: added ", progname);
+ print_host (stderr, ip, target->name);
}
return target;
/* Get the name and address */
name = addr = NULL;
- if ((addr = strtok(buf, " \t\n")) != NULL)
- name = strtok(NULL, " \t\n");
+ if ((addr = strtok(buf, " ,;\t\n")) != NULL)
+ name = strtok(NULL, " ,;\t\n");
else
continue;
addr = NULL;
}
}
- /*printf ("\"%s\" \"%s\"\n", name, addr);*/
+
+ /* If the name is all digits, it's not a name. */
+ if (name)
+ {
+ const char *s;
+ for (s = name; *s; s++)
+ if (*s < '0' || *s > '9')
+ break;
+ if (! *s)
+ {
+ if (debug_p > 1)
+ fprintf (stderr, "%s: skipping bogus name \"%s\" (%s)\n",
+ progname, name, addr);
+ name = NULL;
+ }
+ }
/* Create a new target using first the name then the address */
if (ip1 == ip2)
{
if (debug_p)
- fprintf (stderr, "%s: deleted duplicate: %s\n",
- progname, rest2->next->name);
+ {
+ fprintf (stderr, "%s: deleted duplicate: ", progname);
+ print_host (stderr, ip2, rest2->next->name);
+ }
rest2->next = rest2->next->next;
}
}
(((unsigned char) hent->h_addr_list[0][2]) << 8) |
(((unsigned char) hent->h_addr_list[0][3])));
+ if (base == ((127 << 24) | 1))
+ {
+ fprintf (stderr,
+ "%s: unable to determine local subnet address: \"%s\"\n"
+ " resolves to loopback address %d.%d.%d.%d.\n",
+ progname, hostname,
+ (base >> 24) & 255, (base >> 16) & 255,
+ (base >> 8) & 255, (base ) & 255);
+ return NULL;
+ }
+
for (i = 255; i >= 0; i--) {
int ip = (base & 0xFFFFFF00) | i;
pi->targets = delete_duplicate_hosts (pi->targets);
+ if (debug_p)
+ {
+ ping_target *t;
+ fprintf (stderr, "%s: Target list:\n", progname);
+ for (t = pi->targets; t; t = t->next)
+ {
+ struct sockaddr_in *iaddr = (struct sockaddr_in *) &(t->address);
+ unsigned long ip = iaddr->sin_addr.s_addr;
+ fprintf (stderr, "%s: ", progname);
+ print_host (stderr, ip, t->name);
+ }
+ }
+
/* Make sure there is something to ping */
if (pi->targets == NULL) {
si->sweep_colors, &si->sweep_segs,
False, True, False);
+ if (si->sweep_segs <= 0)
+ si->sweep_segs = 1;
+
/* Done */
return si;
projects / xscreensaver / blobdiff