/*! \brief UID command handler (called by servers)
*
* \param client_p Pointer to allocated Client struct with physical connection
* to this server, i.e. with an open socket connected.
* \param source_p Pointer to allocated Client struct from which the message
* originally comes from. This can be a local or remote client.
* \param parc Integer holding the number of supplied arguments.
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
* pointers.
* \note Valid arguments for this command are:
*
* server introducing new nick (without services support)
* - parv[0] = sender prefix
* - parv[1] = nickname
* - parv[2] = hop count
* - parv[3] = TS
* - parv[4] = umode
* - parv[5] = username
* - parv[6] = hostname
* - parv[7] = ip
* - parv[8] = uid
* - parv[9] = ircname (gecos)
*
* server introducing new nick (with services support)
* - parv[ 0] = sender prefix
* - parv[ 1] = nickname
* - parv[ 2] = hop count
* - parv[ 3] = TS
* - parv[ 4] = umode
* - parv[ 5] = username
* - parv[ 6] = hostname
* - parv[ 7] = ip
* - parv[ 8] = uid
* - parv[ 9] = services id (timestamp)
* - parv[10] = ircname (gecos)
*/
static void
ms_uid(struct Client *client_p, struct Client *source_p,
int parc, char *parv[])
{
struct Client *target_p = NULL;
time_t newts = 0;
const char *svsid = "0";
if (parc < 10 || EmptyString(parv[parc-1]))
return;
if (check_clean_nick(client_p, source_p, parv[1], source_p) ||
check_clean_user(client_p, parv[1], parv[5], source_p) ||
check_clean_host(client_p, parv[1], parv[6], source_p))
return;
newts = atol(parv[3]);
svsid = parc == 11 ? parv[9] : "0";
/*
* If there is an ID collision, kill our client, and kill theirs.
* This may generate 401's, but it ensures that both clients always
* go, even if the other server refuses to do the right thing.
*/
if ((target_p = hash_find_id(parv[8])) != NULL)
{
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"ID collision on %s(%s <- %s)(both killed)",
target_p->name, target_p->from->name,
client_p->name);
kill_client_ll_serv_butone(NULL, target_p, "%s (ID collision)",
me.name);
++ServerStats.is_kill;
AddFlag(target_p, FLAGS_KILLED);
exit_client(target_p, &me, "ID Collision");
return;
}
if ((target_p = hash_find_client(parv[1])) == NULL)
uid_from_server(client_p, source_p, parc, parv, newts, svsid, parv[1], parv[parc-1]);
else if (IsUnknown(target_p))
{
exit_client(target_p, &me, "Overridden");
uid_from_server(client_p, source_p, parc, parv, newts, svsid, parv[1], parv[parc-1]);
}
else
perform_nick_collides(source_p, client_p, target_p, parc, parv, newts, svsid, parv[1],
parv[parc-1], parv[8]);
}
/*! \brief UID command handler
*
* \param source_p Pointer to allocated Client struct from which the message
* originally comes from. This can be a local or remote client.
* \param parc Integer holding the number of supplied arguments.
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
* pointers.
* \note Valid arguments for this command are:
*
* server introducing new nick/UID (without services support)
* - parv[0] = command
* - parv[1] = nickname
* - parv[2] = hop count
* - parv[3] = TS
* - parv[4] = umode
* - parv[5] = username
* - parv[6] = hostname
* - parv[7] = ip
* - parv[8] = uid
* - parv[9] = ircname (gecos)
*
* server introducing new nick/UID (with services support)
* - parv[ 0] = command
* - parv[ 1] = nickname
* - parv[ 2] = hop count
* - parv[ 3] = TS
* - parv[ 4] = umode
* - parv[ 5] = username
* - parv[ 6] = hostname
* - parv[ 7] = ip
* - parv[ 8] = uid
* - parv[ 9] = services id (account name)
* - parv[10] = ircname (gecos)
*/
static int
ms_uid(struct Client *source_p, int parc, char *parv[])
{
struct Client *target_p = NULL;
if (check_clean_nick(source_p, parv[1], source_p) ||
check_clean_user(source_p, parv[1], parv[5], source_p) ||
check_clean_host(source_p, parv[1], parv[6], source_p))
return 0;
/*
* If there is an ID collision, kill our client, and kill theirs.
* This may generate 401's, but it ensures that both clients always
* go, even if the other server refuses to do the right thing.
*/
if ((target_p = hash_find_id(parv[8])))
{
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
"ID collision on %s(%s <- %s)(both killed)",
target_p->name, target_p->from->name,
source_p->from->name);
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (ID collision)",
me.id, target_p->id, me.name);
++ServerStats.is_kill;
AddFlag(target_p, FLAGS_KILLED);
exit_client(target_p, "ID Collision");
return 0;
}
if ((target_p = hash_find_client(parv[1])) == NULL)
uid_from_server(source_p, parc, parv);
else if (IsUnknown(target_p))
{
exit_client(target_p, "Overridden by other sign on");
uid_from_server(source_p, parc, parv);
}
else if (perform_uid_introduction_collides(source_p, target_p, parc, parv))
uid_from_server(source_p, parc, parv);
return 0;
}
static void
perform_nick_collides(struct Client *source_p, struct Client *client_p,
struct Client *target_p, int parc, char *parv[],
time_t newts, const char *svsid, char *nick, char *gecos, char *uid)
{
int sameuser = 0;
/* Server introducing new nick */
if (IsServer(source_p))
{
/* If we don't have a TS, or their TS's are the same, kill both */
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo))
{
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick collision on %s(%s <- %s)(both killed)",
target_p->name, target_p->from->name,
client_p->name);
/* if we have a UID, issue a kill for it */
if (uid)
sendto_one(client_p, ":%s KILL %s :%s (Nick collision (new))",
me.id, uid, me.name);
kill_client_ll_serv_butone(NULL, target_p,
"%s (Nick collision (new))", me.name);
++ServerStats.is_kill;
sendto_one(target_p, form_str(ERR_NICKCOLLISION),
me.name, target_p->name, target_p->name);
AddFlag(target_p, FLAGS_KILLED);
exit_client(target_p, &me, "Nick collision (new)");
return;
}
/* the timestamps are different */
else
{
sameuser = !irccmp(target_p->username, parv[5]) &&
!irccmp(target_p->host, parv[6]);
/*
* If the users are the same (loaded a client on a different server)
* and the new users ts is older, or the users are different and the
* new users ts is newer, ignore the new client and let it do the kill
*/
if ((sameuser && newts < target_p->tsinfo) ||
(!sameuser && newts > target_p->tsinfo))
{
if (uid)
sendto_one(client_p, ":%s KILL %s :%s (Nick collision (new))",
me.id, uid, me.name);
return;
}
else
{
if (sameuser)
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick collision on %s(%s <- %s)(older killed)",
target_p->name, target_p->from->name,
client_p->name);
else
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick collision on %s(%s <- %s)(newer killed)",
target_p->name, target_p->from->name,
client_p->name);
++ServerStats.is_kill;
sendto_one(target_p, form_str(ERR_NICKCOLLISION),
me.name, target_p->name, target_p->name);
/* if it came from a LL server, itd have been source_p,
* so we dont need to mark target_p as known
*/
kill_client_ll_serv_butone(source_p, target_p,
"%s (Nick collision (new))", me.name);
AddFlag(target_p, FLAGS_KILLED);
exit_client(target_p, &me, "Nick collision");
if (!uid && (parc == 9 || parc == 10))
nick_from_server(client_p, source_p, parc, parv, newts, svsid, nick, gecos);
else if (uid && (parc == 10 || parc == 11))
uid_from_server(client_p, source_p, parc, parv, newts, svsid, nick, gecos);
return;
}
}
}
/* its a client changing nick and causing a collide */
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo))
{
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick change collision from %s to %s(%s <- %s)(both killed)",
source_p->name, target_p->name, target_p->from->name,
client_p->name);
sendto_one(target_p, form_str(ERR_NICKCOLLISION), me.name,
target_p->name, target_p->name);
++ServerStats.is_kill;
kill_client_ll_serv_butone(NULL, source_p, "%s (Nick change collision)",
me.name);
++ServerStats.is_kill;
kill_client_ll_serv_butone(NULL, target_p, "%s (Nick change collision)",
me.name);
AddFlag(target_p, FLAGS_KILLED);
exit_client(target_p, &me, "Nick collision (new)");
AddFlag(source_p, FLAGS_KILLED);
exit_client(source_p, &me, "Nick collision (old)");
return;
}
else
{
sameuser = !irccmp(target_p->username, source_p->username) &&
!irccmp(target_p->host, source_p->host);
if ((sameuser && newts < target_p->tsinfo) ||
(!sameuser && newts > target_p->tsinfo))
{
if (sameuser)
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick change collision from %s to %s(%s <- %s)(older killed)",
source_p->name, target_p->name, target_p->from->name,
client_p->name);
else
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick change collision from %s to %s(%s <- %s)(newer killed)",
source_p->name, target_p->name, target_p->from->name,
client_p->name);
++ServerStats.is_kill;
kill_client_ll_serv_butone(client_p, source_p,
"%s (Nick change collision)", me.name);
AddFlag(source_p, FLAGS_KILLED);
if (sameuser)
exit_client(source_p, &me, "Nick collision (old)");
else
exit_client(source_p, &me, "Nick collision (new)");
return;
}
else
{
if (sameuser)
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick collision on %s(%s <- %s)(older killed)",
target_p->name, target_p->from->name,
client_p->name);
else
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Nick collision on %s(%s <- %s)(newer killed)",
target_p->name, target_p->from->name,
client_p->name);
kill_client_ll_serv_butone(source_p, target_p,
"%s (Nick collision)", me.name);
++ServerStats.is_kill;
sendto_one(target_p, form_str(ERR_NICKCOLLISION),
me.name, target_p->name, target_p->name);
AddFlag(target_p, FLAGS_KILLED);
exit_client(target_p, &me, "Nick collision");
}
}
/*
* we should only ever call nick_from_server() here, as
* this is a client changing nick, not a new client
*/
nick_from_server(client_p, source_p, parc, parv, newts, svsid, nick, gecos);
}
