From 35932fe6c8cb481eb687f98424776ce429570c21 Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Sun, 29 Oct 2000 00:02:20 +0000 Subject: [PATCH] - Very big cleanup. --- src/conf.c | 5 +- src/connlist.c | 24 +++---- src/connlist.h | 16 ++--- src/meta.c | 5 +- src/net.c | 69 +++++++++---------- src/protocol.c | 180 +++++++++++++++++++++++-------------------------- src/subnet.c | 29 ++++---- src/tincd.c | 6 +- 8 files changed, 154 insertions(+), 180 deletions(-) diff --git a/src/conf.c b/src/conf.c index 1536b583..ca6640a7 100644 --- a/src/conf.c +++ b/src/conf.c @@ -19,7 +19,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: conf.c,v 1.9.4.17 2000/10/24 15:46:15 guus Exp $ + $Id: conf.c,v 1.9.4.18 2000/10/29 00:02:17 guus Exp $ */ @@ -30,6 +30,7 @@ #include #include #include +#include #include @@ -85,7 +86,7 @@ static internal_config_t hazahaza[] = { config_t * add_config_val(config_t **cfg, int argtype, char *val) { - config_t *p, *r; + config_t *p; char *q; cp p = (config_t*)xmalloc(sizeof(*p)); diff --git a/src/connlist.c b/src/connlist.c index ebb276e7..2965ced2 100644 --- a/src/connlist.c +++ b/src/connlist.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: connlist.c,v 1.1.2.9 2000/10/28 16:41:37 guus Exp $ + $Id: connlist.c,v 1.1.2.10 2000/10/29 00:02:17 guus Exp $ */ #include @@ -27,6 +27,7 @@ #include "conf.h" #include +#include "xalloc.h" #include "system.h" /* Root of the connection list */ @@ -79,14 +80,7 @@ cp next = p->next; if(p->status.remove) - { - if(prev) - prev->next = next; - else - conn_list = next; - - free_conn_list(p); - } + conn_list_del(p); else prev = p; @@ -120,8 +114,10 @@ void conn_list_add(conn_list_t *cl) cp cl->next = conn_list; cl->prev = NULL; + if(cl->next) cl->next->prev = cl; + conn_list = cl; cp } @@ -134,7 +130,9 @@ cp else conn_list = cl->next; - cl->next->prev = cl->prev; + if(cl->next) + cl->next->prev = cl->prev; + free_conn_list(cl); cp } @@ -170,20 +168,20 @@ cp for(s = myself->subnets; s != NULL; s = s->next) { netstr = net2str(s); - syslog(LOG_DEBUG, ": %s", netstr); + syslog(LOG_DEBUG, " %s", netstr); free(netstr); } for(p = conn_list; p != NULL; p = p->next) { - syslog(LOG_DEBUG, _("%s at %s port %hd flags %d sockets %d, %d status %04x"), + syslog(LOG_DEBUG, _(" %s at %s port %hd flags %d sockets %d, %d status %04x"), p->name, p->hostname, p->port, p->flags, p->socket, p->meta_socket, p->status); for(s = p->subnets; s != NULL; s = s->next) { netstr = net2str(s); - syslog(LOG_DEBUG, ": %s", netstr); + syslog(LOG_DEBUG, " %s", netstr); free(netstr); } } diff --git a/src/connlist.h b/src/connlist.h index 3ea64eed..ee91aeaf 100644 --- a/src/connlist.h +++ b/src/connlist.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: connlist.h,v 1.1.2.5 2000/10/28 16:41:37 guus Exp $ + $Id: connlist.h,v 1.1.2.6 2000/10/29 00:02:18 guus Exp $ */ #ifndef __TINC_CONNLIST_H__ @@ -31,11 +31,11 @@ typedef struct conn_list_t { char *name; /* name of this connection */ - ipv4_t address; /* his real (internet) ip */ + ipv4_t address; /* his real (internet) ip */ char *hostname; /* the hostname of its real ip */ short unsigned int port; /* his portnumber */ int protocol_version; /* used protocol */ - int options; /* options turned on for this connection */ + long int options; /* options turned on for this connection */ int flags; /* his flags */ int socket; /* our udp vpn socket */ @@ -64,10 +64,8 @@ typedef struct conn_list_t { char *mychallenge; /* challenge we received from him */ char *hischallenge; /* challenge we sent to him */ - struct conn_list_t *nexthop; /* nearest meta-hop in this direction, will be changed to myuplink (GS) */ - struct conn_list_t *hisuplink; /* his nearest meta-hop in our direction */ - struct conn_list_t *myuplink; /* our nearest meta-hop in his direction */ - + struct conn_list_t *nexthop; /* nearest meta-hop in this direction */ + struct subnet_t *subnets; /* Pointer to a list of subnets belonging to this connection */ struct config_t *config; /* Pointer to configuration tree belonging to this host */ @@ -83,8 +81,8 @@ extern conn_list_t *myself; extern conn_list_t *new_conn_list(); extern void free_conn_list(conn_list_t *); -extern void add_conn_list(conn_list_t *); -extern void del_conn_list(conn_list_t *); +extern void conn_list_add(conn_list_t *); +extern void conn_list_del(conn_list_t *); extern conn_list_t *lookup_id(char *); extern void dump_conn_list(void); extern int read_host_config(conn_list_t *); diff --git a/src/meta.c b/src/meta.c index bc9d0b52..5774bb93 100644 --- a/src/meta.c +++ b/src/meta.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: meta.c,v 1.1.2.6 2000/10/24 15:46:16 guus Exp $ + $Id: meta.c,v 1.1.2.7 2000/10/29 00:02:18 guus Exp $ */ #include "config.h" @@ -28,9 +28,12 @@ #include #include #include +#include +#include #include "net.h" #include "system.h" +#include "protocol.h" int send_meta(conn_list_t *cl, char *buffer, int length) { diff --git a/src/net.c b/src/net.c index 3da023c3..8b243a5c 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 1.35.4.49 2000/10/28 21:52:22 guus Exp $ + $Id: net.c,v 1.35.4.50 2000/10/29 00:02:18 guus Exp $ */ #include "config.h" @@ -38,6 +38,7 @@ #include #include #include +#include #ifdef HAVE_TUNTAP #include LINUX_IF_TUN_H @@ -660,7 +661,6 @@ int setup_myself(void) { config_t const *cfg; subnet_t *net; - int i; cp myself = new_conn_list(); @@ -731,7 +731,7 @@ cp /* Read in all the subnets specified in the host configuration file */ - for(cfg = myself->config; cfg = get_config_val(cfg, subnet); cfg = cfg->next) + for(cfg = myself->config; (cfg = get_config_val(cfg, subnet)); cfg = cfg->next) { net = new_subnet(); net->type = SUBNET_IPV4; @@ -868,7 +868,6 @@ cp } if(p->status.meta) { - send_termreq(p); shutdown(p->meta_socket, 0); /* No more receptions */ close(p->meta_socket); } @@ -1016,7 +1015,6 @@ cp int handle_incoming_vpn_data() { vpn_packet_t pkt; - int lenin; int x, l = sizeof(x); struct sockaddr from; socklen_t fromlen = sizeof(from); @@ -1056,10 +1054,14 @@ cp void terminate_connection(conn_list_t *cl) { conn_list_t *p; - + subnet_t *s; cp if(cl->status.remove) - return; + { + return; + } + + cl->status.remove = 1; if(debug_lvl >= DEBUG_CONNECTIONS) syslog(LOG_NOTICE, _("Closing connection with %s (%s)"), @@ -1070,36 +1072,33 @@ cp if(cl->status.meta) close(cl->meta_socket); - cl->status.remove = 1; - - /* If this cl isn't active, don't send any DEL_HOSTs. */ - -/* FIXME: reprogram this. - if(cl->status.active) - notify_others(cl,NULL,send_del_host); -*/ - cp /* Find all connections that were lost because they were behind cl (the connection that was dropped). */ + if(cl->status.meta) for(p = conn_list; p != NULL; p = p->next) - { - if((p->nexthop == cl) && (p != cl)) - { - if(cl->status.active && p->status.active) -/* FIXME: reprogram this - notify_others(p,cl,send_del_host); -*/; - if(cl->socket) - close(cl->socket); - p->status.active = 0; - p->status.remove = 1; - } - } - + if((p->nexthop == cl) && (p != cl)) + terminate_connection(p); /* Sounds like recursion, but p does not have a meta connection :) */ + + /* Inform others of termination if it was still active */ + + if(cl->status.active) + for(p = conn_list; p != NULL; p = p->next) + if(p->status.meta && p->status.active && p!=cl) + send_del_host(p, cl); + + /* Remove the associated subnets */ + + for(s = cl->subnets; s; s = s->next) + subnet_del(s); + + /* Inactivate */ + cl->status.active = 0; - + + /* Check if this was our outgoing connection */ + if(cl->status.outgoing) { signal(SIGALRM, sigalrm_handler); @@ -1126,8 +1125,6 @@ cp now = time(NULL); for(p = conn_list; p != NULL; p = p->next) { - if(p->status.remove) - continue; if(p->status.active && p->status.meta) { if(p->last_ping_time + timeout < now) @@ -1178,9 +1175,7 @@ cp return 0; } - ncn->status.meta = 1; - ncn->next = conn_list; - conn_list = ncn; + conn_list_add(ncn); cp return 0; } @@ -1239,8 +1234,6 @@ cp void handle_tap_input(void) { vpn_packet_t vp; - subnet_t *subnet; - ipv4_t dest; int lenin; cp if(taptype == TAP_TYPE_TUNTAP) diff --git a/src/protocol.c b/src/protocol.c index c3681af4..71b13676 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 1.28.4.46 2000/10/28 21:05:18 guus Exp $ + $Id: protocol.c,v 1.28.4.47 2000/10/29 00:02:19 guus Exp $ */ #include "config.h" @@ -37,6 +37,7 @@ #include #include +#include #include "conf.h" #include "encr.h" @@ -44,6 +45,7 @@ #include "netutl.h" #include "protocol.h" #include "meta.h" +#include "connlist.h" #include "system.h" @@ -108,6 +110,7 @@ cp syslog(LOG_DEBUG, _("Got %s from %s (%s)"), request_name[request], cl->name, cl->hostname); } + if(request_handlers[request](cl)) /* Something went wrong. Probably scriptkiddies. Terminate. */ { @@ -122,6 +125,8 @@ cp cl->name, cl->hostname); return -1; } +cp + return 0; } /* Connection protocol: @@ -214,19 +219,17 @@ cp } } cp - if(!(cfg = get_config_val(cl->config, publickey))) - { - syslog(LOG_ERR, _("No public key known for %s (%s)"), cl->name, cl->hostname); - return -1; - } - else + if((cfg = get_config_val(cl->config, publickey))) { -cp cl->rsa_key = RSA_new(); BN_hex2bn(&cl->rsa_key->n, cfg->data.ptr); BN_hex2bn(&cl->rsa_key->e, "FFFF"); } - + else + { + syslog(LOG_ERR, _("No public key known for %s (%s)"), cl->name, cl->hostname); + return -1; + } cp return send_challenge(cl); } @@ -452,16 +455,10 @@ cp if(debug_lvl >= DEBUG_CONNECTIONS) syslog(LOG_NOTICE, _("Removing old entry for %s at %s in favour of new connection from %s"), cl->name, old->hostname, cl->hostname); - old->status.active = 0; + terminate_connection(old); } - /* Notify others of this connection */ - - for(p = conn_list; p; p = p->next) - if(p->status.active) - send_add_host(p, cl); - /* Activate this connection */ cl->allow_request = ALL; @@ -479,6 +476,24 @@ cp for(s = myself->subnets; s; s = s->next) send_add_subnet(cl, s); + + /* And send him all the hosts and their subnets we know... */ + + for(p = conn_list; p; p = p->next) + if(p != cl && p->status.active) + { + /* Notify others of this connection */ + + if(p->status.meta) + send_add_host(p, cl); + + /* Notify new connection of everything we know */ + + send_add_host(cl, p); + + for(s = p->subnets; s; s = s->next) + send_add_subnet(cl, s); + } cp return 0; } @@ -501,8 +516,8 @@ int add_subnet_h(conn_list_t *cl) { char *subnetstr; char *name; - conn_list_t *owner; - subnet_t *subnet, *old; + conn_list_t *owner, *p; + subnet_t *subnet; cp if(sscanf(cl->buffer, "%*d %as %as", &name, &subnetstr) != 2) { @@ -555,6 +570,12 @@ cp /* If everything is correct, add the subnet to the list of the owner */ subnet_add(owner, subnet); + + /* Tell the rest */ + + for(p = conn_list; p; p = p->next) + if(p->status.meta && p->status.active && p!= cl) + send_add_subnet(p, subnet); cp return 0; } @@ -575,8 +596,8 @@ int del_subnet_h(conn_list_t *cl) { char *subnetstr; char *name; - conn_list_t *owner; - subnet_t *subnet, *old; + conn_list_t *owner, *p; + subnet_t *subnet; cp if(sscanf(cl->buffer, "%*d %as %as", &name, &subnetstr) != 3) { @@ -629,6 +650,12 @@ cp /* If everything is correct, delete the subnet from the list of the owner */ subnet_del(subnet); + + /* Tell the rest */ + + for(p = conn_list; p; p = p->next) + if(p->status.meta && p->status.active && p!= cl) + send_del_subnet(p, subnet); cp return 0; } @@ -638,18 +665,18 @@ cp int send_add_host(conn_list_t *cl, conn_list_t *other) { cp - return send_request(cl, "%d %s %s %lx:%d %lx", ADD_HOST, - myself->name, other->name, other->address, other->port, other->options); + return send_request(cl, "%d %s %lx:%d %lx", ADD_HOST, + other->name, other->address, other->port, other->options); } int add_host_h(conn_list_t *cl) { - char *sender; - conn_list_t *old, *new, *hisuplink; + conn_list_t *old, *new; + conn_list_t *p; cp new = new_conn_list(); - if(sscanf(cl->buffer, "%*d %as %as %lx:%d %lx", &sender, &new->name, &new->address, &new->port, &new->options) != 5) + if(sscanf(cl->buffer, "%*d %as %lx:%d %lx", &new->name, &new->address, &new->port, &new->options) != 4) { syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s)"), cl->name, cl->hostname); return -1; @@ -657,10 +684,10 @@ cp /* Check if identity is a valid name */ - if(check_id(new->name) || check_id(sender)) + if(check_id(new->name)) { syslog(LOG_ERR, _("Got bad ADD_HOST from %s (%s): invalid identity name"), cl->name, cl->hostname); - free(sender); + free_conn_list(new); return -1; } @@ -670,32 +697,10 @@ cp { syslog(LOG_ERR, _("Warning: got ADD_HOST from %s (%s) for ourself, restarting"), cl->name, cl->hostname); sighup = 1; - free(sender); - return 0; - } - - /* We got an ADD_HOST from ourself!? */ - - if(!strcmp(sender, myself->name)) - { - syslog(LOG_ERR, _("Warning: got ADD_HOST from %s (%s) from ourself, restarting"), cl->name, cl->hostname); - sighup = 1; - free(sender); + free_conn_list(new); return 0; } - - /* Lookup his uplink */ - - if(!(new->hisuplink = lookup_id(sender))) - { - syslog(LOG_ERR, _("Got ADD_HOST from %s (%s) with origin %s which is not in our connection list"), - sender, cl->name, cl->hostname); - free(sender); - return -1; - } - free(sender); - /* Fill in more of the new conn_list structure */ new->hostname = hostlookup(htonl(new->address)); @@ -709,31 +714,34 @@ cp if(debug_lvl >= DEBUG_CONNECTIONS) syslog(LOG_NOTICE, _("Got duplicate ADD_HOST for %s (%s) from %s (%s)"), old->name, old->hostname, new->name, new->hostname); + free_conn_list(new); return 0; } else { if(debug_lvl >= DEBUG_CONNECTIONS) - syslog(LOG_NOTICE, _("Removing old entry for %s (%s)"), + syslog(LOG_NOTICE, _("Removing old entry for %s (%s) in favour of new connection"), old->name, old->hostname); - old->status.active = 0; + terminate_connection(old); } } + /* Hook it up into the conn_list */ + + conn_list_add(new); + + /* Tell the rest about the new host */ + + for(p = conn_list; p; p = p->next) + if(p->status.meta && p->status.active && p!=cl) + send_add_host(p, new); + /* Fill in rest of conn_list structure */ new->nexthop = cl; new->status.active = 1; - /* Hook it up into the conn_list */ - - conn_list_add(conn_list, new); - - /* Tell the rest about the new host */ -/* FIXME: reprogram this. - notify_others(new, cl, send_add_host); -*/ cp return 0; } @@ -741,21 +749,19 @@ cp int send_del_host(conn_list_t *cl, conn_list_t *other) { cp - return send_request(cl, "%d %s %s %lx:%d %lx", DEL_HOST, - myself->name, other->name, other->address, other->port, other->options); + return send_request(cl, "%d %s %lx:%d %lx", DEL_HOST, + other->name, other->address, other->port, other->options); } int del_host_h(conn_list_t *cl) { char *name; - char *sender; ip_t address; port_t port; - int options; - conn_list_t *old, *hisuplink; - + long int options; + conn_list_t *old, *p; cp - if(sscanf(cl->buffer, "%*d %as %as %lx:%d %lx", &sender, &name, &address, &port, &options) != 5) + if(sscanf(cl->buffer, "%*d %as %lx:%d %lx", &name, &address, &port, &options) != 4) { syslog(LOG_ERR, _("Got bad DEL_HOST from %s (%s)"), cl->name, cl->hostname); @@ -764,10 +770,10 @@ cp /* Check if identity is a valid name */ - if(check_id(name) || check_id(sender)) + if(check_id(name)) { syslog(LOG_ERR, _("Got bad DEL_HOST from %s (%s): invalid identity name"), cl->name, cl->hostname); - free(name); free(sender); + free(name); return -1; } @@ -777,33 +783,11 @@ cp { syslog(LOG_ERR, _("Warning: got DEL_HOST from %s (%s) for ourself, restarting"), cl->name, cl->hostname); - free(name); free(sender); - sighup = 1; - return 0; - } - - /* We got an ADD_HOST from ourself!? */ - - if(!strcmp(sender, myself->name)) - { - syslog(LOG_ERR, _("Warning: got DEL_HOST from %s (%s) from ourself, restarting"), cl->name, cl->hostname); + free(name); sighup = 1; - free(name); free(sender); return 0; } - /* Lookup his uplink */ - - if(!(hisuplink = lookup_id(sender))) - { - syslog(LOG_ERR, _("Got DEL_HOST from %s (%s) with origin %s which is not in our connection list"), - cl->name, cl->hostname, sender); - free(name); free(sender); - return -1; - } - - free(sender); - /* Check if the new host already exists in the connnection list */ if(!(old = lookup_id(name))) @@ -816,7 +800,7 @@ cp /* Check if the rest matches */ - if(address!=old->address || port!=old->port || options!=old->options || hisuplink!=old->hisuplink || cl!=old->myuplink) + if(address!=old->address || port!=old->port || options!=old->options || cl!=old->nexthop) { syslog(LOG_WARNING, _("Got DEL_HOST from %s (%s) for %s which doesn't match"), cl->name, cl->hostname, old->name); return 0; @@ -824,10 +808,14 @@ cp /* Ok, since EVERYTHING seems to check out all right, delete it */ - old->status.termreq = 1; old->status.active = 0; - terminate_connection(old); + + /* Tell the rest about the new host */ + + for(p = conn_list; p; p = p->next) + if(p->status.meta && p->status.active && p!=cl) + send_del_host(p, old); cp return 0; } @@ -893,7 +881,6 @@ cp } free(errorstring); - cl->status.termreq = 1; terminate_connection(cl); cp return 0; @@ -908,7 +895,6 @@ cp int termreq_h(conn_list_t *cl) { cp - cl->status.termreq = 1; terminate_connection(cl); cp return 0; diff --git a/src/subnet.c b/src/subnet.c index 215b156b..1a9a5608 100644 --- a/src/subnet.c +++ b/src/subnet.c @@ -17,10 +17,11 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: subnet.c,v 1.1.2.7 2000/10/28 21:05:20 guus Exp $ + $Id: subnet.c,v 1.1.2.8 2000/10/29 00:02:20 guus Exp $ */ #include +#include #include "config.h" #include @@ -114,28 +115,22 @@ cp /* Remove it from owner's list */ if(subnet->prev) - { - subnet->prev->next = subnet->next; - } + subnet->prev->next = subnet->next; else - { - subnet->owner->subnets = subnet->next; - } + subnet->owner->subnets = subnet->next; - subnet->next->prev = subnet->prev; + if(subnet->next) + subnet->next->prev = subnet->prev; /* Remove it from the global list */ if(subnet->global_prev) - { - subnet->global_prev->global_next = subnet->global_next; - } + subnet->global_prev->global_next = subnet->global_next; else - { - subnet_list[subnet->type] = subnet->global_next; - } + subnet_list[subnet->type] = subnet->global_next; - subnet->global_next->global_prev = subnet->global_prev; + if(subnet->global_next) + subnet->global_next->global_prev = subnet->global_prev; free_subnet(subnet); cp @@ -288,7 +283,7 @@ cp for(i=0; i<8; i++) if((address.x[i] & subnet->net.ipv6.mask.x[i]) != subnet->net.ipv6.address.x[i]) break; - if(i=8) + if(i == 8) break; } cp @@ -305,7 +300,7 @@ cp for(subnet = subnet_list[SUBNET_IPV4]; subnet != NULL; subnet = subnet->global_next) { netstr = net2str(subnet); - syslog(LOG_DEBUG, "%s owner %s", netstr, subnet->owner->name); + syslog(LOG_DEBUG, " %s owner %s", netstr, subnet->owner->name); free(netstr); } diff --git a/src/tincd.c b/src/tincd.c index 41361d7c..ca873ef2 100644 --- a/src/tincd.c +++ b/src/tincd.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: tincd.c,v 1.10.4.16 2000/10/28 21:05:20 guus Exp $ + $Id: tincd.c,v 1.10.4.17 2000/10/29 00:02:20 guus Exp $ */ #include "config.h" @@ -33,6 +33,7 @@ #include #include #include +#include #ifdef HAVE_SYS_IOCTL_H # include @@ -119,8 +120,7 @@ parse_options(int argc, char **argv, char **envp) { int r; int option_index = 0; - config_t *p; - + while((r = getopt_long(argc, argv, "c:Ddkn:K::", long_options, &option_index)) != EOF) { switch(r) -- 2.20.1