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5c18363271
mars-nwe/nwroute.c
Mario Fetka 5c18363271 mars_nwe-0.99.pl06
2011-11-13 00:38:59 +01:00

966 lines
28 KiB
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/* nwroute.c 08-Feb-98 */
/* (C)opyright (C) 1993,1998 Martin Stover, Marburg, Germany
*
* 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.
*/
#include "net.h"
#include "nwserv.h"
typedef struct {
uint32 net; /* destnet */
uint16 hops; /* hops to net over rnet */
uint16 ticks; /* ticks to net, ether 1/hop, isdn 7/hop */
uint32 rnet; /* net of forw. router */
uint8 rnode[IPX_NODE_SIZE]; /* node of forw. router */
} NW_ROUTES;
static int anz_routes=0;
static int max_nw_routes=0;
static NW_ROUTES **nw_routes=NULL;
typedef struct {
uint8 *name; /* Server Name */
int typ; /* Server Typ */
ipxAddr_t addr; /* Server Addr */
uint32 net; /* routing over NET */
int hops;
int flags;
} NW_SERVERS;
static int anz_servers=0;
static int max_nw_servers=0;
static NW_SERVERS **nw_servers=NULL;
#define NEEDS_UPDATE_SAP 1
#define NEEDS_UPDATE_SAP_QUERY 2
#define NEEDS_UPDATE_RIP 4
#define NEEDS_UPDATE_RIP_NET 8
#define NEEDS_UPDATE_ALL (8|4|2|1)
static void insert_delete_net(uint32 destnet,
uint32 rnet, /* routernet */
uint8 *rnode, /* routernode */
uint16 hops,
uint16 ticks,
int do_delete) /* delete == 1 */
{
int k = -1;
int freeslot = -1;
NW_ROUTES *nr = NULL;
NW_NET_DEVICE *nd_dev = NULL;
int ndticks = 99;
XDPRINTF((3,0,"Beg: %s net:0x%X, over 0x%X, 0x%02x:%02x:%02x:%02x:%02x:%02x",
(do_delete) ? "DEL" : "INS", destnet, rnet,
(int)rnode[0], (int)rnode[1], (int)rnode[2],
(int)rnode[3], (int)rnode[4], (int)rnode[5]));
if (!destnet || destnet == internal_net) return;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->is_up) {
if (nd->net == destnet) {
if (!do_delete) return; /* don't alter device */
nd_dev = nd;
}
if (nd->net == rnet) ndticks=nd->ticks;
}
}
if (!do_delete && nd_dev && nd_dev->ticks <= ndticks) return;
k=-1;
while (++k < anz_routes && nw_routes[k]->net != destnet) {
if (freeslot < 0 && !nw_routes[k]->net) freeslot=k;
}
if (k == anz_routes) { /* no route slot found */
if (do_delete) return; /* nothing to delete */
if (freeslot < 0) {
if (anz_routes == max_nw_routes) {
int new_max_nw = max_nw_routes+5;
NW_ROUTES **new_nwr
=(NW_ROUTES**)xcmalloc(new_max_nw*sizeof(NW_ROUTES*));
if (max_nw_servers)
memcpy(new_nwr, nw_routes, max_nw_routes*sizeof(NW_ROUTES*));
xfree(nw_routes);
nw_routes=new_nwr;
max_nw_routes=new_max_nw;
}
nw_routes[k] = (NW_ROUTES*)xmalloc(sizeof(NW_ROUTES));
anz_routes++;
} else k=freeslot;
nr=nw_routes[k];
memset(nr, 0, sizeof(NW_ROUTES));
nr->net = destnet;
nr->ticks = 0xffff;
nr->hops = 0xffff;
} else if (do_delete) {
nr=nw_routes[k];
if (nr->rnet == rnet && IPXCMPNODE(nr->rnode, rnode) ) {
/* only delete the routes, which we have inserted */
XDPRINTF((2,0,"ROUTE DEL NET=0x%x over Router NET 0x%x",
nr->net, rnet));
ipx_route_del(nr->net);
if (nd_dev != NULL) { /* this is net to our device */
/* I must delete and setup new, because there is */
/* no direct way to delete this route from interface :( */
exit_dev(nd_dev->devname, nd_dev->frame);
init_dev(nd_dev->devname, nd_dev->frame, nd_dev->net, 0);
}
nr->net = 0L;
} else {
XDPRINTF((3,0,"ROUTE NOT deleted NET=0x%x, RNET=0x%x",
nr->net, rnet));
}
return;
} else nr=nw_routes[k];
ticks+=ndticks;
if (ticks <= nr->ticks) {
if (ticks == nr->ticks && hops >= nr->hops) return;
nr->hops = hops;
nr->ticks = ticks;
nr->rnet = rnet;
memcpy(nr->rnode, rnode, IPX_NODE_SIZE);
XDPRINTF((2,0,"ADD ROUTE NET=0x%X, over 0x%X, 0x%02x:%02x:%02x:%02x:%02x:%02x",
nr->net, nr->rnet,
(int)nr->rnode[0], (int)nr->rnode[1], (int)nr->rnode[2],
(int)nr->rnode[3], (int)nr->rnode[4], (int)nr->rnode[5]));
ipx_route_add(nr->net, nr->rnet, nr->rnode);
}
}
NW_NET_DEVICE *find_netdevice(uint32 network)
/* return the device over which the network is routed, I hope */
{
uint32 net=network;
int l=2;
while (l--) {
int k=-1;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->is_up && nd->net == net) {
XDPRINTF((3, 0, "found netdevive %s, frame=%d, ticks=%d",
nd->devname, nd->frame, nd->ticks));
return(nd);
}
}
if (!l) return(NULL);
k=-1;
while (++k < anz_routes && nw_routes[k]->net != network);;
if (k < anz_routes) net=nw_routes[k]->rnet;
else return(NULL);
}
return(NULL);
}
static NW_NET_DEVICE *find_device_by_net(uint32 net)
/* return the device of this net I hope */
{
int k=-1;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->is_up && nd->net == net) return(nd);
}
return(NULL);
}
int activate_slow_net(uint32 net)
{
NW_NET_DEVICE *nd=find_device_by_net(net);
if (nd && nd->ticks > 6) { /* if 'slow net' */
if (acttime_stamp > nd->updated_time + 600) {
nd->needs_update=NEEDS_UPDATE_ALL;
nd->updated_time=acttime_stamp;
return(1);
}
}
return(0);
}
void insert_delete_server(uint8 *name, /* Server Name */
int styp, /* Server Typ */
ipxAddr_t *addr, /* Server Addr */
ipxAddr_t *from_addr,
int hops,
int do_delete, /* delete = 1 */
int flags)
{
int k=-1;
int freeslot=-1;
uint32 net;
uint8 sname[MAX_SERVER_NAME+2];
NW_SERVERS *nr=NULL;
strmaxcpy(sname, name, MAX_SERVER_NAME);
upstr(sname);
XDPRINTF((3,0,"%s %s %s,0x%04x",
visable_ipx_adr(addr),
(do_delete) ? "DEL" : "INS", sname, (int) styp));
k=-1;
if (!*sname) return;
while (++k < anz_servers && (nw_servers[k]->typ != styp ||
!nw_servers[k]->name || strcmp(nw_servers[k]->name, sname)) ) {
if (nw_servers[k]->name) {
XDPRINTF((10,0, "Server %s = typ=0x%04x",
nw_servers[k]->name, nw_servers[k]->typ));
}
if (freeslot < 0 && !nw_servers[k]->typ) freeslot=k;
}
if (k == anz_servers) { /* server not found */
if (do_delete) return; /* nothing to delete */
if (freeslot < 0) {
if (anz_servers == max_nw_servers) {
int new_max_nw = max_nw_servers+5;
NW_SERVERS **new_nws
=(NW_SERVERS**)xcmalloc(new_max_nw*sizeof(NW_SERVERS*));
if (max_nw_servers)
memcpy(new_nws, nw_servers, max_nw_servers*sizeof(NW_SERVERS*));
xfree(nw_servers);
nw_servers=new_nws;
max_nw_servers=new_max_nw;
}
nw_servers[k] = (NW_SERVERS*)xcmalloc(sizeof(NW_SERVERS));
anz_servers++;
} else k=freeslot;
nr = nw_servers[k];
new_str(nr->name, sname);
nr->typ = styp;
nr->hops = 0xffff;
} else if (do_delete) {
nr=nw_servers[k];
#if !IN_NWROUTED
if (!IPXCMPNODE(nr->addr.node, my_server_adr.node) ||
!IPXCMPNET (nr->addr.net, my_server_adr.net) )
#endif
{
#if !IN_NWROUTED
ins_del_bind_net_addr(nr->name, nr->typ, NULL);
#endif
xfree(nr->name);
memset(nr, 0, sizeof(NW_SERVERS));
}
return;
} else nr=nw_servers[k];
/* here now i perhaps must change the entry */
if (nr->hops > 16 || memcmp(&(nr->addr), addr, sizeof(ipxAddr_t))) {
memcpy(&(nr->addr), addr, sizeof(ipxAddr_t));
#if !IN_NWROUTED
ins_del_bind_net_addr(nr->name, nr->typ, addr);
if (IPXCMPNODE(from_addr->node, my_server_adr.node) &&
IPXCMPNET (from_addr->net, my_server_adr.net)
&& GET_BE16(from_addr->sock) == SOCK_SAP) {
hops = 0;
}
#endif
}
if (hops <= nr->hops && 0 != (net = GET_BE32(from_addr->net)) ) {
if (nr->net && nr->net != net && nr->hops >= hops) {
NW_NET_DEVICE *nrd=find_device_by_net(nr->net);
NW_NET_DEVICE *nnd=find_device_by_net(net);
if (nrd && nnd && nrd->ticks < nnd->ticks) return;
}
nr->net = net;
nr->hops = hops;
}
}
static uint32 rnet=0L; /* Router NET */
static int rmode; /* 0=normal, 1=shutdown response */
/* 10=request */
static int rentries=0;
static int max_rip_entries=0;
static uint8 *rip_buff=NULL;
static void init_rip_buff(uint32 net, int mode)
{
rnet = net;
rentries = 0;
rmode = mode;
if (!rip_buff) {
max_rip_entries=10;
rip_buff=xcmalloc(2+max_rip_entries*8);
}
U16_TO_BE16((mode > 9) ? 1 : 2, rip_buff); /* rip request or response */
}
static void ins_rip_buff(uint32 net, uint16 hops, uint16 ticks)
{
if (!net) return;
if (net != rnet || (!rentries && net == internal_net)) {
uint8 *p;
if (rentries >= max_rip_entries) {
int new_rip_entries=max_rip_entries+5;
uint8 *new_ripbuf=xcmalloc(2 + new_rip_entries*8);
if (max_rip_entries)
memcpy(new_ripbuf, rip_buff, 2 + max_rip_entries*8);
xfree(rip_buff);
rip_buff=new_ripbuf;
max_rip_entries=new_rip_entries;
}
p=rip_buff+2+(rentries*8);
U32_TO_BE32(net, p);
U16_TO_BE16(hops, p+4);
U16_TO_BE16(ticks, p+6);
rentries++;
}
}
static void build_rip_buff(uint32 destnet)
{
int is_wild = (destnet==MAX_U32);
int is_response = (rmode < 10);
int k;
if (!destnet) return;
if (is_wild) rentries=0;
if (is_response) {
if (is_wild || internal_net == destnet) {
ins_rip_buff(internal_net, (rmode==1) ? 16 : 1,
(rnet==internal_net) ? 1 : 2);
}
k=-1;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->is_up && (is_wild || nd->net == destnet))
ins_rip_buff(nd->net, (rmode==1) ? 16 : 1, nd->ticks+1);
}
}
k=-1;
while (++k < anz_routes) {
NW_ROUTES *nr=nw_routes[k];
if (nr->rnet != rnet && (is_wild || (nr->net == destnet)) )
ins_rip_buff(nr->net, (rmode==1) ? 16 : nr->hops+1, nr->ticks+1);
}
}
static void send_rip_buff(ipxAddr_t *from_addr)
{
while (rentries > 0) {
int entries = min(rentries, 50);
int datasize = (entries*8)+2;
ipxAddr_t to_addr;
rentries -= entries;
if (from_addr) memcpy(&to_addr, from_addr, sizeof(ipxAddr_t));
else {
memset(&to_addr, 0, sizeof(ipxAddr_t));
U32_TO_BE32(rnet, to_addr.net);
memset(to_addr.node, 0xFF, IPX_NODE_SIZE);
U16_TO_BE16(SOCK_RIP, to_addr.sock);
}
#if DO_DEBUG
if (nw_debug) {
uint8 *p = rip_buff;
int operation = GET_BE16(p);
XDPRINTF((2,0, "Send Rip %s entries=%d",
(operation==1) ? "Request" : "Response", entries));
p+=2;
while (entries--) {
#if 0
uint32 net = GET_BE32(p);
#endif
uint16 hops = GET_BE16(p+4);
uint16 ticks = GET_BE16(p+6);
XDPRINTF((2,0, "hops=%3d, ticks %3d, network:%02x.%02x.%02x.%02x",
(int)hops, (int)ticks, (int)*(p), (int)*(p+1), (int)*(p+2), (int)*(p+3)));
p+=8;
}
}
#endif
send_ipx_data(sockfd[RIP_SLOT], 1,
datasize,
(char *)rip_buff,
&to_addr, "SEND RIP");
if (rentries > 0)
memcpy(rip_buff+2, rip_buff+2+50*8, min(50, rentries)*8);
} /* while */
rentries=0;
}
static void send_rip_broadcast(int mode)
/* mode=0, standard broadcast */
/* mode=1, first trie */
/* mode=2, shutdown */
/* mode=4, only to needs update*/
{
int k=-1;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (mode == 4 && !(nd->needs_update&NEEDS_UPDATE_RIP)) continue;
if (nd->is_up && (nd->ticks < 7
|| mode || (nd->needs_update&NEEDS_UPDATE_RIP) )) {
/* isdn devices should not get RIP broadcasts everytime */
nd->needs_update&=~NEEDS_UPDATE_RIP;
init_rip_buff(nd->net, (mode == 2) ? 1 : 0);
build_rip_buff(MAX_U32);
send_rip_buff(NULL);
}
}
}
void rip_for_net(uint32 net)
{
int k=-1;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->is_up && (nd->ticks < 7
|| (nd->needs_update&NEEDS_UPDATE_RIP_NET) ) ) {
/* isdn devices should not get RIP broadcasts everytime */
nd->needs_update&=~NEEDS_UPDATE_RIP_NET;
init_rip_buff(nd->net, 10);
ins_rip_buff(net, MAX_U16, MAX_U16);
send_rip_buff(NULL);
}
}
}
void handle_rip(int fd, int ipx_pack_typ,
int data_len, IPX_DATA *ipxdata,
ipxAddr_t *from_addr)
/* All received rip packets reach this function */
/* It can be a RIP Request or a RIP Response */
{
int operation = GET_BE16(ipxdata->rip.operation);
int entries = (data_len-2) / 8;
uint8 *p = ((uint8*)ipxdata)+2;
int is_response = operation==2;
XDPRINTF((2,0, "Got Rip %s entries=%d from: %s",
(!is_response) ? "Request" : "Response", entries,
visable_ipx_adr(from_addr)));
if (!is_response) {
if (operation != 1) {
XDPRINTF((1,0, "UNKNOWN RIP operation %d", operation));
return;
}
init_rip_buff(GET_BE32(from_addr->net), 0);
}
while (entries--) {
uint32 net = GET_BE32(p);
uint16 hops = GET_BE16(p+4);
uint16 ticks = GET_BE16(p+6);
XDPRINTF((2,0,"hops=%3d, ticks %3d, network:%02x.%02x.%02x.%02x",
(int)hops, (int)ticks, (int)*(p), (int)*(p+1), (int)*(p+2), (int)*(p+3)));
if (is_response) {
insert_delete_net(net, GET_BE32(from_addr->net),
from_addr->node, hops, ticks, (hops > 15) ? 1 : 0);
} else { /* rip request */
build_rip_buff(net);
if (net == MAX_U32) break;
}
p+=8;
}
if (!is_response) /* rip request */
send_rip_buff(from_addr);
}
/* <========================= SAP ============================> */
static void send_sap_to_addr(int entry, int hops, int ticks,
int respond_typ, ipxAddr_t *to_addr)
{
if (entry > -1) {
IPX_DATA ipx_data;
NW_SERVERS *nw=nw_servers[entry];
memset(&ipx_data, 0, sizeof(ipx_data.sip));
strcpy((char*)ipx_data.sip.server_name, nw->name);
memcpy(&ipx_data.sip.server_adr, &nw->addr, sizeof(ipxAddr_t));
XDPRINTF((4, 0, "%s SERVER=%s, typ=0x%x, ticks=%d, hops=%d, sock=0x%x",
(respond_typ==4) ? "NEAREST" : "GENERAL", nw->name,
nw->typ, ticks, hops, (int)GET_BE16(nw->addr.sock)));
U16_TO_BE16(respond_typ, ipx_data.sip.response_type);
U16_TO_BE16(nw->typ, ipx_data.sip.server_type);
U16_TO_BE16(hops, ipx_data.sip.intermediate_networks);
send_ipx_data(sockfd[SAP_SLOT],
4, /* this is the official packet typ for SAP's */
sizeof(ipx_data.sip),
(char *)&(ipx_data.sip),
to_addr, "Sap Server Response");
}
}
void send_server_response(int respond_typ,
int styp, ipxAddr_t *to_addr)
/* respond_typ 2 = general, 4 = nearest service respond */
{
int j = -1;
int ticks = 99;
int hops = 15;
int entry = -1;
while (ticks && ++j < anz_servers) {
NW_SERVERS *nw=nw_servers[j];
if (nw->typ == styp && nw->name && *(nw->name)) {
int xticks=999;
if (nw->net != internal_net) {
NW_NET_DEVICE *nd=find_netdevice(nw->net);
if (nd) xticks = nd->ticks;
} else xticks = 0;
if (xticks < ticks || (xticks == ticks && nw->hops <= hops)) {
ticks = xticks;
hops = nw->hops;
entry = j;
}
}
}
send_sap_to_addr(entry, hops+1, ticks, respond_typ, to_addr);
}
static void send_sip_to_net(uint32 nd_net, int nd_ticks, int mode)
{
ipxAddr_t wild;
int j=-1;
memset(&wild, 0, sizeof(ipxAddr_t));
U32_TO_BE32(nd_net, wild.net);
memset(wild.node, 0xFF, IPX_NODE_SIZE);
U16_TO_BE16(SOCK_SAP, wild.sock);
while (++j < anz_servers) {
NW_SERVERS *nw=nw_servers[j];
if ( !nw->typ /* server has no typ */
|| ( nw->net == nd_net && nw->hops) /* server has same net but */
/* hops */
|| ( mode == 2 && nw->hops) ) { /* no SAP to this NET */
XDPRINTF((3, 0, "No SAP mode=%d, to net=0x%lx for server '%s'",
mode, nd_net, nw->name));
continue;
}
#ifdef CONFIG_C_LEASING
if (nd_ticks > 6
&& nw->typ != 0x0004
&& nw->typ != 0x0107
&& nw->typ != 0x023f
&& nw->typ != 0x027b
&& nw->typ != 0x044c) continue;
#endif
send_sap_to_addr(j, (mode == 2) ? 16 : nw->hops+1,
nd_ticks,
2, /* General */
&wild);
} /* while */
}
static void send_sap_broadcast(int mode)
/* mode=0, standard broadcast */
/* mode=1, first trie */
/* mode=2, shutdown */
/* mode=4, only update*/
{
int k=-1;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (mode == 4 && !(nd->needs_update&NEEDS_UPDATE_SAP)) continue;
if (nd->is_up && (nd->ticks < 7 ||
(nd->needs_update&NEEDS_UPDATE_SAP) || mode)) {
/* isdn devices should not get SAP broadcasts everytime */
nd->needs_update &= ~NEEDS_UPDATE_SAP;
send_sip_to_net(nd->net, nd->ticks, mode);
}
}
}
static FILE *open_route_info_fn(int force, FILE *ff, int section)
{
static int tacs=0;
FILE *f=NULL;
if (section>1 && !(print_route_mode&2))
return(ff);
if (print_route_tac > 0) {
if (!tacs || force) {
char fnbuf[300];
char *fn;
if (print_route_mode&2) {
sprintf(fnbuf, "%s.%d", pr_route_info_fn, section);
fn = fnbuf;
} else {
fn=pr_route_info_fn;
}
f=fopen(fn, (print_route_mode&0x1) ? "w" : "a");
if (section == 1) {
if (NULL != f)
tacs = print_route_tac-1;
else {
print_route_tac=0;
errorp(0, "route info", "Openerror of `%s`", fn);
}
} else {
if (NULL != f)
fclose(ff);
else
f = ff; /* we use old file */
}
} else tacs--;
}
return(f);
}
void print_routing_info(int force)
{
FILE *f= open_route_info_fn(force, NULL, 1);
if (f) {
int k=-1;
int i;
time_t xtime;
time(&xtime);
fprintf(f, "%s", ctime(&xtime) );
fprintf(f, "<--------- %d Devices ---------------->\n", count_net_devices);
fprintf(f, "%-15s %-15s %5s Network Status\n", "DevName", "Frame", "Ticks");
while (++k < count_net_devices) {
uint8 frname[30];
NW_NET_DEVICE *nd=net_devices[k];
(void) get_frame_name(frname, nd->frame);
fprintf(f, "%-15s %-15s %5d %08lX %s\n",
nd->devname, frname, nd->ticks, nd->net,
(!nd->is_up) ? "DOWN"
: ( (nd->is_up==1) ? "UP"
: "ADDED") );
}
if (print_route_mode&2) {
f= open_route_info_fn(1, f, 2);
fprintf(f, "%s", ctime(&xtime) );
}
i=0;
k=-1;
while (++k < anz_routes) {
NW_ROUTES *nr = nw_routes[k];
if (nr->net) i++;
}
fprintf(f, "<--------- %d Routes ---------->\n", i);
fprintf(f, "%8s Hops Ticks %9s Router Node\n", "Network", "RouterNet");
k=-1;
while (++k < anz_routes) {
NW_ROUTES *nr = nw_routes[k];
if (nr->net) {
fprintf(f, "%08lX %4d %5d %08lX %02x:%02x:%02x:%02x:%02x:%02x\n",
nr->net, nr->hops, nr->ticks, nr->rnet,
(int)nr->rnode[0], (int)nr->rnode[1], (int)nr->rnode[2],
(int)nr->rnode[3], (int)nr->rnode[4], (int)nr->rnode[5]);
}
}
if (print_route_mode&2) {
f= open_route_info_fn(1, f, 3);
fprintf(f, "%s", ctime(&xtime) );
}
i=0;
k=-1;
while (++k < anz_servers) {
NW_SERVERS *ns = nw_servers[k];
if (ns->typ) i++;
}
fprintf(f, "<--------- %d Servers ---------->\n", i);
fprintf(f, "%-20s %4s %9s Hops Server-Address\n","Name", "Typ", "RouterNet");
k=-1;
while (++k < anz_servers) {
NW_SERVERS *ns = nw_servers[k];
if (ns->typ) {
char sname[50];
strmaxcpy(sname, ns->name, 20);
fprintf(f, "%-20s %4x %08lX %4d %s\n", sname, ns->typ,
ns->net, ns->hops, xvisable_ipx_adr(&(ns->addr), 1));
}
} /* while */
fclose(f);
}
}
static int look_for_interfaces(void);
void send_sap_rip_broadcast(int mode)
/* mode=0, standard broadcast */
/* mode=1, first trie */
/* mode=2, shutdown */
/* mode=3, update routes */
/* mode=4, resend to net */
/* mode=5, force update routes */
{
static int flipflop=1;
int force_print_routes=(mode == 1) ? 1 : 0;
if (mode == 5) {
force_print_routes++;
mode = 3;
}
if (auto_detect_interfaces)
force_print_routes += look_for_interfaces();
if (mode) {
if (mode == 3) {
if (force_print_routes) {
send_rip_broadcast(1);
send_sap_broadcast(1);
}
} else {
send_rip_broadcast(mode);
send_sap_broadcast(mode);
}
} else {
if (flipflop) {
send_rip_broadcast(mode);
flipflop=0;
} else {
send_sap_broadcast(mode);
flipflop=1;
}
}
if (flipflop || force_print_routes)
print_routing_info(force_print_routes); /* every second time */
}
static void sap_find_nearest_server(uint32 net)
/* searches for the nearest server on network net */
{
SQP sqp;
ipxAddr_t wild;
memset(&wild, 0, sizeof(ipxAddr_t));
memset(wild.node, 0xFF, IPX_NODE_SIZE);
U32_TO_BE32(net, wild.net);
U16_TO_BE16(SOCK_SAP, wild.sock);
U16_TO_BE16(3, sqp.query_type); /* 3 nearest Server Query */
U16_TO_BE16(4, sqp.server_type); /* file server */
send_ipx_data(sockfd[SAP_SLOT], 17, sizeof(SQP),
(char*)&sqp, &wild, "SERVER Query");
}
void get_servers(void)
{
int k=-1;
while (++k < count_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->is_up && (nd->ticks < 7
|| nd->needs_update&NEEDS_UPDATE_SAP_QUERY)){
nd->needs_update &= ~NEEDS_UPDATE_SAP_QUERY;
sap_find_nearest_server(nd->net);
}
}
if (!count_net_devices) sap_find_nearest_server(internal_net);
}
int dont_send_wdog(ipxAddr_t *addr)
/* returns != 0 if ticks are to high for wdogs */
{
NW_NET_DEVICE *nd;
if (!wdogs_till_tics) return(0); /* ever send wdogs */
else if (wdogs_till_tics < 0) return(1); /* never send wdogs */
if (NULL != (nd=find_netdevice(GET_BE32(addr->net))))
return((nd->ticks < wdogs_till_tics) ? 0 : 1);
return(0);
}
void realloc_net_devices(void)
{
int new_max_netd=max_net_devices+2;
NW_NET_DEVICE **new_nd=(NW_NET_DEVICE**)
xcmalloc(new_max_netd*sizeof(NW_NET_DEVICE*));
if (max_net_devices)
memcpy(new_nd, net_devices, max_net_devices*sizeof(NW_NET_DEVICE*));
xfree(net_devices);
net_devices=new_nd;
max_net_devices=new_max_netd;
}
/* ---------------------------------------------------- */
int test_ins_device_net(uint32 rnet)
{
int rnetframe;
uint8 rnetdevname[100];
int k = -1;
int foundfree=-1; /* first matching/free entry */
NW_NET_DEVICE *nd;
if (!rnet || rnet == internal_net) return(0);
while (++k < count_net_devices) {
nd=net_devices[k];
if (!nd->is_up) {
if (nd->net == rnet) {
foundfree = k;
break;
} else if (foundfree < 0 && !nd->net)
foundfree = k;
} else if (nd->net == rnet) return(0);
}
if ((rnetframe=get_interface_frame_name(rnetdevname, rnet)) < 0)
return(0);
if (foundfree > -1 && (net_devices[foundfree])->net != rnet) {
int devfound = -1;
int framefound = -1;
k = foundfree - 1;
foundfree = -1;
while (++k < count_net_devices) {
nd = net_devices[k];
if (!nd->is_up && !nd->net) {
int dfound = !strcmp(nd->devname, rnetdevname);
int ffound = nd->frame == rnetframe;
if (dfound && ffound) {
devfound = k;
framefound = k;
break;
} else {
if (dfound) {
if (devfound < 0 && nd->frame < 0)
devfound =k;
} else if (ffound) {
if (framefound < 0 && nd->devname[0] == '*')
framefound=k;
} else if (nd->frame < 0 && nd->devname[0] == '*') {
if (foundfree < 0)
foundfree = k;
}
}
}
}
if (devfound > -1) foundfree = devfound;
else if (framefound > -1) foundfree = framefound;
}
if ( foundfree < 0 ) {
NW_NET_DEVICE **pnd;
int matched=0;
k=-1;
if (count_net_devices >= max_net_devices)
realloc_net_devices();
while (++k < count_net_devices) {
nd = net_devices[k];
if (nd->wildmask&3) {
int dfound = !strcmp(nd->devname, rnetdevname);
int ffound = nd->frame == rnetframe;
if ( (dfound && ffound) || (dfound && (nd->wildmask&2) )
|| (ffound && (nd->wildmask&1))) {
pnd=&(net_devices[count_net_devices++]);
*pnd= (NW_NET_DEVICE*)xcmalloc(sizeof(NW_NET_DEVICE));
(*pnd)->wildmask = nd->wildmask;
(*pnd)->ticks = nd->ticks;
matched++;
nd=*pnd;
break;
}
}
}
if (!matched) return(0);
} else {
nd = net_devices[foundfree];
}
nd->net = rnet;
nd->frame = rnetframe;
new_str(nd->devname, rnetdevname);
nd->is_up = 2;
nd->needs_update=NEEDS_UPDATE_ALL;
/* now perhaps i must delete an existing route over */
/* another device */
k = -1;
while (++k < anz_routes) {
NW_ROUTES *nr = nw_routes[k];
if (nr->net == rnet) {
ipx_route_del(nr->net);
nr->net = 0L;
/* I must delete and setup new, because there is */
/* no direct way to delete this route from interface :( */
exit_dev(nd->devname, nd->frame);
init_dev(nd->devname, nd->frame, nd->net, 0);
break;
}
}
return(1);
}
static int look_for_interfaces(void)
{
FILE *f=fopen("/proc/net/ipx_interface", "r");
int find_diffs=0;
if (f) {
char buff[200];
NW_NET_DEVICE *nd;
int k = -1;
while (++k < count_net_devices) {
nd=net_devices[k];
if (nd->is_up == 2) nd->is_up = -2; /* this will be put DOWN */
}
while (fgets((char*)buff, sizeof(buff), f) != NULL){
uint32 rnet;
uint8 dname[25];
int flags;
int fframe = read_interface_data((uint8*) buff, &rnet, NULL, &flags, dname);
if (fframe < 0) continue;
if (rnet > 0L && !(flags & 2)) { /* not internal */
int found=0;
k=-1;
while (++k < count_net_devices) {
nd=net_devices[k];
if (nd->net == rnet) {
found++;
break;
}
}
if (found && nd->is_up) {
if (nd->is_up == -2) nd->is_up=2; /* reset */
} else find_diffs+=test_ins_device_net(rnet);
}
}
fclose(f);
k = -1;
while (++k < count_net_devices) {
nd=net_devices[k];
if (nd->is_up < 0) {
int j;
find_diffs++;
nd->is_up = 0; /* this will be put DOWN */
XDPRINTF((1,0,"Device %s net=0x%x removed",
nd->devname ? nd->devname : "?", nd->net));
for (j=0; j < anz_routes; j++){
NW_ROUTES *nr=nw_routes[j];
if (nr && nr->rnet == nd->net) {
nr->net = 0L; /* remove route */
XDPRINTF((1,0,"Route to net=0x%x removed", nr->net));
}
}
if (nd->wildmask & 1)
new_str(nd->devname, "*");
if (nd->wildmask & 2)
nd->frame = -1;
if (nd->wildmask & 4)
nd->net = 0;
}
}
}
return(find_diffs);
}
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