/* protocol_subnet.c -- handle the meta-protocol, subnets Copyright (C) 1999-2002 Ivo Timmermans , 2000-2002 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. $Id: protocol_subnet.c,v 1.1.4.7 2002/09/09 19:40:09 guus Exp $ */ #include "config.h" #include #include #include #include #include #include #include #include #include #include "conf.h" #include "net.h" #include "netutl.h" #include "protocol.h" #include "meta.h" #include "connection.h" #include "node.h" #include "system.h" int send_add_subnet(connection_t *c, subnet_t *subnet) { int x; char *netstr; cp(); x = send_request(c, "%d %lx %s %s", ADD_SUBNET, random(), subnet->owner->name, netstr = net2str(subnet)); free(netstr); cp(); return x; } int add_subnet_h(connection_t *c) { char subnetstr[MAX_STRING_SIZE]; char name[MAX_STRING_SIZE]; node_t *owner; subnet_t *s; cp(); if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING, name, subnetstr) != 2) { syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_SUBNET", c->name, c->hostname); return -1; } /* Check if owner name is a valid */ if(check_id(name)) { syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid name")); return -1; } /* Check if subnet string is valid */ s = str2net(subnetstr); if(!s) { syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_SUBNET", c->name, c->hostname, _("invalid subnet string")); return -1; } if(seen_request(c->buffer)) return 0; /* Check if the owner of the new subnet is in the connection list */ owner = lookup_node(name); if(!owner) { owner = new_node(); owner->name = xstrdup(name); node_add(owner); } /* Check if we already know this subnet */ if(lookup_subnet(owner, s)) { free_subnet(s); return 0; } /* If we don't know this subnet, but we are the owner, retaliate with a DEL_SUBNET */ if(owner == myself) { if(debug_lvl >= DEBUG_PROTOCOL) syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself"), "ADD_SUBNET", c->name, c->hostname); s->owner = myself; send_del_subnet(c, s); return 0; } /* If everything is correct, add the subnet to the list of the owner */ subnet_add(owner, s); /* Tell the rest */ forward_request(c); cp(); return 0; } int send_del_subnet(connection_t *c, subnet_t *s) { int x; char *netstr; cp(); netstr = net2str(s); x = send_request(c, "%d %lx %s %s", DEL_SUBNET, random(), s->owner->name, netstr); free(netstr); cp(); return x; } int del_subnet_h(connection_t *c) { char subnetstr[MAX_STRING_SIZE]; char name[MAX_STRING_SIZE]; node_t *owner; subnet_t *s, *find; cp(); if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING, name, subnetstr) != 2) { syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_SUBNET", c->name, c->hostname); return -1; } /* Check if owner name is a valid */ if(check_id(name)) { syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid name")); return -1; } /* Check if the owner of the new subnet is in the connection list */ owner = lookup_node(name); if(!owner) { if(debug_lvl >= DEBUG_PROTOCOL) syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which is not in our node tree"), "DEL_SUBNET", c->name, c->hostname, name); return 0; } /* Check if subnet string is valid */ s = str2net(subnetstr); if(!s) { syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_SUBNET", c->name, c->hostname, _("invalid subnet string")); return -1; } if(seen_request(c->buffer)) return 0; /* If everything is correct, delete the subnet from the list of the owner */ s->owner = owner; find = lookup_subnet(owner, s); free_subnet(s); if(!find) { if(debug_lvl >= DEBUG_PROTOCOL) syslog(LOG_WARNING, _("Got %s from %s (%s) for %s which does not appear in his subnet tree"), "DEL_SUBNET", c->name, c->hostname, name); return 0; } /* If we are the owner of this subnet, retaliate with an ADD_SUBNET */ if(owner == myself) { if(debug_lvl >= DEBUG_PROTOCOL) syslog(LOG_WARNING, _("Got %s from %s (%s) for ourself"), "DEL_SUBNET", c->name, c->hostname); send_add_subnet(c, find); return 0; } /* Tell the rest */ forward_request(c); /* Finally, delete it. */ subnet_del(owner, find); cp(); return 0; }