/* bogus_host()
*
* inputs - hostname
* output - 1 if a bogus hostname input, 0 if its valid
* side effects - none
*/
static int
bogus_host(char *host)
{
unsigned int length = 0;
unsigned int dots = 0;
char *s = host;
for (; *s; s++)
{
if (!IsServChar(*s))
return(1);
++length;
if ('.' == *s)
++dots;
}
return(!dots || length > HOSTLEN);
}
bool
valid_servername(const char *servername)
{
const char *s;
int dots = 0;
for(s = servername; *s != '\0'; s++)
{
if(!IsServChar(*s))
{
return false;
}
if(*s == '.')
dots++;
}
if(dots == 0)
{
return false;
}
return true;
}
/*
* bogus_host
*
* inputs - hostname
* output - 1 if a bogus hostname input, 0 if its valid
* side effects - none
*/
int bogus_host(char *host)
{
int bogus_server = 0;
char *s;
int dots = 0;
for( s = host; *s; s++ )
{
if (!IsServChar(*s))
{
bogus_server = 1;
break;
}
if ('.' == *s)
++dots;
}
if (!dots || bogus_server || strlen(host) > HOSTLEN)
return 1;
return 0;
}
/*
* m_links - LINKS message handler
* parv[0] = sender prefix
* parv[1] = servername mask
* or
* parv[0] = sender prefix
* parv[1] = server to query
* parv[2] = servername mask
*/
int m_links(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
const char* mask = "";
struct Client* acptr;
struct ConfItem* aconf;
char clean_mask[2 * HOSTLEN + 4];
char* p;
int bogus_server = 0;
static time_t last_used = 0L;
if (parc > 2)
{
if (!IsServer(sptr) && !HasUmode(sptr,UMODE_REMOTEINFO))
{
if (SeesOperMessages(sptr))
sendto_one(sptr,":%s NOTICE %s :You have no S umode", me.name, parv[0]);
else
sendto_one(sptr, form_str(ERR_NOPRIVILEGES), me.name, parv[0]);
return 0;
}
if (hunt_server(cptr, sptr, ":%s LINKS %s :%s", 1, parc, parv)
!= HUNTED_ISME)
return 0;
mask = parv[2];
}
else if (parc == 2)
mask = parv[1];
assert(0 != mask);
if(!NoFloodProtection(sptr))
{
/* reject non local requests */
if(!MyClient(sptr))
return 0;
if(IsHoneypot(sptr) || (last_used + PACE_WAIT) > CurrentTime)
{
/* safe enough to give this on a local connect only */
sendto_one(sptr,form_str(RPL_LOAD2HI),me.name,parv[0],"LINKS");
return 0;
}
else
{
last_used = CurrentTime;
}
}
/*
* *sigh* Before the kiddies find this new and exciting way of
* annoying opers, lets clean up what is sent to all opers
* -Dianora
*/
{
const char* s = mask;
while (*s)
{
if (!IsServChar(*s)) {
bogus_server = 1;
break;
}
s++;
}
}
if (bogus_server)
{
sendto_ops_flag(UMODE_SPY,
"BOGUS LINKS '%s' requested by %s (%s@%s) [%s]",
clean_string(clean_mask, (const unsigned char *) mask, 2 * HOSTLEN),
sptr->name, sptr->username,
sptr->host, sptr->user->server);
return 0;
}
if (*mask) /* only necessary if there is a mask */
mask = collapse(clean_string(clean_mask, (const unsigned char *) mask, 2 * HOSTLEN));
/* Here's a cute spacing hack for you -- asuffield */
if (MyConnect(sptr))
sendto_ops_flag(UMODE_SPY,
"LINKS %s%srequested by %s (%s@%s) [%s]",
mask, mask ? " " : "" , sptr->name, sptr->username,
sptr->host, sptr->user->server);
for (aconf = ConfigItemList; aconf; aconf = aconf->next)
{
if (aconf->status != CONF_NOCONNECT_SERVER)
continue;
if ((aconf->flags & CONF_FLAGS_HIDDEN_SERVER) && !HasUmode(sptr, UMODE_AUSPEX))
continue;
acptr = find_server(aconf->name);
if (!acptr)
continue;
if (!IsServer(acptr) && !IsMe(acptr))
continue;
if (*mask && !match(mask, acptr->name))
continue;
if (HasUmode(sptr,UMODE_AUSPEX))
sendto_one(sptr, form_str(RPL_LINKS),
me.name, parv[0], acptr->name, acptr->serv->up,
HasUmode(sptr, UMODE_SEEROUTING) ? acptr->hopcount : 0,
acptr->info[0] ? acptr->info : "(Unknown Location)");
else
{
if(acptr->info[0])
{
/* kludge, you didn't see this nor am I going to admit
* that I coded this.
*/
p = strchr(acptr->info,']');
if(p)
p += 2; /* skip the nasty [IP] part */
else
p = acptr->info;
}
else
{
static char unknown[] = "(Unknown Location)";
p = unknown;
}
#ifdef SERVERHIDE
if (strlen(acptr->name) < 6 || strcmp(".quiet", (acptr->name)+(strlen(acptr->name)-6)) || strcmp(".local", (acptr->name)+(strlen(acptr->name)-6)) || HasUmode(sptr,UMODE_SEEROUTING))
sendto_one(sptr, form_str(RPL_LINKS),
me.name, parv[0], acptr->name, HasUmode(sptr,UMODE_SEEROUTING) ? acptr->serv->up : NETWORK_NAME,
0, p);
#else
sendto_one(sptr, form_str(RPL_LINKS),
me.name, parv[0], acptr->name, acptr->serv->up,
acptr->hopcount, p);
#endif
}
}
sendto_one(sptr, form_str(RPL_ENDOFLINKS), me.name, parv[0],
EmptyString(mask) ? "*" : mask);
return 0;
}
