/** * Handler for the IRC "KILL" command. * * This function implements the IRC command "KILL" which is used to selectively * disconnect clients. It can be used by IRC operators and servers, for example * to "solve" nick collisions after netsplits. See RFC 2812 section 3.7.1. * * Please note that this function is also called internally, without a real * KILL command being received over the network! Client is Client_ThisServer() * in this case, and the prefix in Req is NULL. * * @param Client The client from which this command has been received or * Client_ThisServer() when generated interanlly. * @param Req Request structure with prefix and all parameters. * @return CONNECTED or DISCONNECTED. */ GLOBAL bool IRC_KILL(CLIENT *Client, REQUEST *Req) { CLIENT *prefix; char reason[COMMAND_LEN]; assert (Client != NULL); assert (Req != NULL); if (Client_Type(Client) != CLIENT_SERVER && !Op_Check(Client, Req)) return Op_NoPrivileges(Client, Req); /* Get prefix (origin); use the client if no prefix is given. */ if (Req->prefix) prefix = Client_Search(Req->prefix); else prefix = Client; /* Log a warning message and use this server as origin when the * prefix (origin) is invalid. And this is the reason why we don't * use the _IRC_GET_SENDER_OR_RETURN_ macro above! */ if (!prefix) { Log(LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!", Req->prefix ); prefix = Client_ThisServer(); } if (Client != Client_ThisServer()) Log(LOG_NOTICE|LOG_snotice, "Got KILL command from \"%s\" for \"%s\": \"%s\".", Client_Mask(prefix), Req->argv[0], Req->argv[1]); /* Build reason string: Prefix the "reason" if the originator is a * regular user, so users can't spoof KILLs of servers. */ if (Client_Type(Client) == CLIENT_USER) snprintf(reason, sizeof(reason), "KILLed by %s: %s", Client_ID(Client), Req->argv[1]); else strlcpy(reason, Req->argv[1], sizeof(reason)); return IRC_KillClient(Client, prefix, Req->argv[0], reason); }
/** * Handler for the IRC command "SQUIT". * See RFC 2813 section 4.1.2 and RFC 2812 section 3.1.8. */ GLOBAL bool IRC_SQUIT(CLIENT * Client, REQUEST * Req) { char msg[COMMAND_LEN], logmsg[COMMAND_LEN]; CLIENT *from, *target; CONN_ID con; int loglevel; assert(Client != NULL); assert(Req != NULL); if (Client_Type(Client) != CLIENT_SERVER && !Client_HasMode(Client, 'o')) return Op_NoPrivileges(Client, Req); /* Bad number of arguments? */ if (Req->argc != 2) return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, Client_ID(Client), Req->command); if (Client_Type(Client) == CLIENT_SERVER && Req->prefix) { from = Client_Search(Req->prefix); if (Client_Type(from) != CLIENT_SERVER && !Op_Check(Client, Req)) return Op_NoPrivileges(Client, Req); } else from = Client; if (!from) return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->prefix); if (Client_Type(Client) == CLIENT_USER) loglevel = LOG_NOTICE | LOG_snotice; else loglevel = LOG_DEBUG; Log(loglevel, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID(from), Req->argv[0], Req->argv[1]); target = Client_Search(Req->argv[0]); if (Client_Type(Client) != CLIENT_SERVER && target == Client_ThisServer()) return Op_NoPrivileges(Client, Req); if (!target) { /* The server is (already) unknown */ Log(LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID(Client), Req->argv[0]); return CONNECTED; } con = Client_Conn(target); if (Req->argv[1][0]) if (Client_NextHop(from) != Client || con > NONE) snprintf(msg, sizeof(msg), "%s (SQUIT from %s)", Req->argv[1], Client_ID(from)); else strlcpy(msg, Req->argv[1], sizeof(msg)); else snprintf(msg, sizeof(msg), "Got SQUIT from %s", Client_ID(from)); if (con > NONE) { /* We are directly connected to the target server, so we * have to tear down the connection and to inform all the * other remaining servers in the network */ IRC_SendWallops(Client_ThisServer(), Client_ThisServer(), "Received SQUIT %s from %s: %s", Req->argv[0], Client_ID(from), Req->argv[1][0] ? Req->argv[1] : "-"); Conn_Close(con, NULL, msg, true); if (con == Client_Conn(Client)) return DISCONNECTED; } else { /* This server is not directly connected, so the SQUIT must * be forwarded ... */ if (Client_Type(from) != CLIENT_SERVER) { /* The origin is not an IRC server, so don't evaluate * this SQUIT but simply forward it */ IRC_WriteStrClientPrefix(Client_NextHop(target), from, "SQUIT %s :%s", Req->argv[0], Req->argv[1]); } else { /* SQUIT has been generated by another server, so * remove the target server from the network! */ logmsg[0] = '\0'; if (!strchr(msg, '(')) snprintf(logmsg, sizeof(logmsg), "%s (SQUIT from %s)", Req->argv[1], Client_ID(from)); Client_Destroy(target, logmsg[0] ? logmsg : msg, msg, false); } } return CONNECTED; } /* IRC_SQUIT */