From 24a2c7e51a0b080c4bdb55f697b3f0458ebc3fb1 Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Mon, 24 Sep 2001 14:12:00 +0000 Subject: [PATCH] Not only keep track of nexthop, but also of lastbutonehop. If destination cl wants indirectdata, send it to the lastbutonehop instead, unless it too has requested so, and so on. --- src/connection.h | 3 ++- src/net.c | 28 ++++++++++++++++++------- src/protocol.c | 53 +++++++++++++++++++++++++++++++++--------------- src/protocol.h | 4 ++-- 4 files changed, 62 insertions(+), 26 deletions(-) diff --git a/src/connection.h b/src/connection.h index fb7d2797..5d34cd21 100644 --- a/src/connection.h +++ b/src/connection.h @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: connection.h,v 1.1.2.11 2001/07/20 20:25:10 guus Exp $ + $Id: connection.h,v 1.1.2.12 2001/09/24 14:11:59 guus Exp $ */ #ifndef __TINC_CONNECTION_H__ @@ -97,6 +97,7 @@ typedef struct connection_t { char *hischallenge; /* challenge we sent to him */ struct connection_t *nexthop; /* nearest meta-hop in this direction */ + struct connection_t *lastbutonehop; /* meta-hop closest to him */ avl_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this connection */ diff --git a/src/net.c b/src/net.c index d25cec75..7a2a8e7f 100644 --- a/src/net.c +++ b/src/net.c @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: net.c,v 1.35.4.130 2001/09/24 13:31:15 guus Exp $ + $Id: net.c,v 1.35.4.131 2001/09/24 14:12:00 guus Exp $ */ #include "config.h" @@ -230,6 +230,7 @@ cp */ void send_packet(connection_t *cl, vpn_packet_t *packet) { + connection_t *hop; cp if(debug_lvl >= DEBUG_TRAFFIC) syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"), @@ -254,15 +255,28 @@ cp return; } - /* Check if it has to go via TCP or UDP... */ -cp - if((cl->options | myself->options) & OPTION_TCPONLY) + if(myself->options & OPTION_TCPONLY) { - if(send_tcppacket(cl, packet)) - terminate_connection(cl, 1); + if(send_tcppacket(cl->nexthop, packet)) + terminate_connection(cl->nexthop, 1); } else - send_udppacket(cl, packet); + { + if(myself->options & OPTION_INDIRECT) + send_udppacket(cl->nexthop, packet); + else + { + hop = cl; + + while(hop->options & OPTION_INDIRECT) + if(hop->lastbutonehop == myself) + break; + else + hop = hop->lastbutonehop; + + send_udppacket(hop, packet); + } + } } /* Broadcast a packet to all active direct connections */ diff --git a/src/protocol.c b/src/protocol.c index 1d39a83f..e9ee9665 100644 --- a/src/protocol.c +++ b/src/protocol.c @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: protocol.c,v 1.28.4.105 2001/09/01 12:02:39 guus Exp $ + $Id: protocol.c,v 1.28.4.106 2001/09/24 14:12:00 guus Exp $ */ #include "config.h" @@ -263,6 +263,7 @@ cp cl->allow_request = ALL; cl->nexthop = cl; + cl->lastbutonehop = myself; cl->cipher_pkttype = EVP_bf_cbc(); cl->cipher_pktkeylength = cl->cipher_pkttype->key_len + cl->cipher_pkttype->iv_len; @@ -775,19 +776,19 @@ cp int send_add_host(connection_t *cl, connection_t *other) { cp - return send_request(cl, "%d %s %lx:%d %lx", ADD_HOST, - other->name, other->address, other->port, other->options); + return send_request(cl, "%d %s %lx:%d %lx %s", ADD_HOST, + other->name, other->address, other->port, other->options, other->lastbutonehop->name); } int add_host_h(connection_t *cl) { connection_t *old, *new, *p; - char name[MAX_STRING_SIZE]; + char name[MAX_STRING_SIZE], lastbutone[MAX_STRING_SIZE]; avl_node_t *node; cp new = new_connection(); - if(sscanf(cl->buffer, "%*d "MAX_STRING" %lx:%hd %lx", name, &new->address, &new->port, &new->options) != 4) + if(sscanf(cl->buffer, "%*d "MAX_STRING" %lx:%hd %lx "MAX_STRING, name, &new->address, &new->port, &new->options, lastbutone) != 5) { syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s)"), cl->name, cl->hostname); return -1; @@ -802,20 +803,35 @@ cp return -1; } + if(check_id(lastbutone)) + { + syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s): invalid lastbutone name"), cl->name, cl->hostname); + free_connection(new); + return -1; + } + /* Check if somebody tries to add ourself */ if(!strcmp(name, myself->name)) { - syslog(LOG_ERR, _("Warning: got ADD_HOST from %s (%s) for ourself, restarting"), cl->name, cl->hostname); - sighup = 1; + syslog(LOG_ERR, _("Got ADD_HOST from %s (%s) for ourself!"), cl->name, cl->hostname); free_connection(new); - return 0; + return -1; } /* Fill in more of the new connection structure */ new->hostname = hostlookup(htonl(new->address)); + new->lastbutonehop = lookup_id(lastbutone); + + if(!new->lastbutonehop) + { + syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s): unknown lastbutone"), cl->name, cl->hostname); + free_connection(new); + return -1; + } + /* Check if the new host already exists in the connnection list */ if((old = lookup_id(name))) @@ -864,20 +880,20 @@ cp int send_del_host(connection_t *cl, connection_t *other) { cp - return send_request(cl, "%d %s %lx:%d %lx", DEL_HOST, - other->name, other->address, other->port, other->options); + return send_request(cl, "%d %s %lx:%d %lx %s", DEL_HOST, + other->name, other->address, other->port, other->options, other->lastbutonehop->name); } int del_host_h(connection_t *cl) { - char name[MAX_STRING_SIZE]; + char name[MAX_STRING_SIZE], lastbutone[MAX_STRING_SIZE]; ipv4_t address; port_t port; long int options; connection_t *old, *p; avl_node_t *node; cp - if(sscanf(cl->buffer, "%*d "MAX_STRING" %lx:%hd %lx", name, &address, &port, &options) != 4) + if(sscanf(cl->buffer, "%*d "MAX_STRING" %lx:%hd %lx "MAX_STRING, name, &address, &port, &options, lastbutone) != 5) { syslog(LOG_ERR, _("Got bad DEL_HOST from %s (%s)"), cl->name, cl->hostname); @@ -892,14 +908,19 @@ cp return -1; } + if(check_id(lastbutone)) + { + syslog(LOG_ERR, _("Got bad DEL_HOST from %s (%s): invalid lastbutone name"), cl->name, cl->hostname); + return -1; + } + /* Check if somebody tries to delete ourself */ if(!strcmp(name, myself->name)) { - syslog(LOG_ERR, _("Warning: got DEL_HOST from %s (%s) for ourself, restarting"), + syslog(LOG_ERR, _("Got DEL_HOST from %s (%s) for ourself!"), cl->name, cl->hostname); - sighup = 1; - return 0; + return -1; } /* Check if the deleted host already exists in the connnection list */ @@ -913,7 +934,7 @@ cp /* Check if the rest matches */ - if(address!=old->address || port!=old->port || options!=old->options || cl!=old->nexthop) + if(address!=old->address || port!=old->port || options!=old->options || cl!=old->nexthop || strcmp(lastbutone, old->lastbutonehop->name)) { syslog(LOG_WARNING, _("Got DEL_HOST from %s (%s) for %s which doesn't match"), cl->name, cl->hostname, old->name); return 0; diff --git a/src/protocol.h b/src/protocol.h index c202f5c2..0d163868 100644 --- a/src/protocol.h +++ b/src/protocol.h @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: protocol.h,v 1.5.4.21 2001/05/24 21:30:36 guus Exp $ + $Id: protocol.h,v 1.5.4.22 2001/09/24 14:12:00 guus Exp $ */ #ifndef __TINC_PROTOCOL_H__ @@ -30,7 +30,7 @@ incompatible version have different protocols. */ -#define PROT_CURRENT 10 +#define PROT_CURRENT 11 /* Request numbers */ -- 2.20.1